### Install Dependencies with Pod Install

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/README.md

Run the 'pod install' command to download and integrate the Hyphenate SDK and its dependencies into your Xcode project.

```bash
$ pod install
```

--------------------------------

### Call Initiation

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMCallManager.html

Methods for starting voice and video calls.

```APIDOC
## startCall:remoteName:ext:completion:

### Description
Initiates a call of a specified type to a remote user.

### Method
- (void)startCall:(EMCallType)_aType_ remoteName:(NSString *)_aRemoteName_ ext:(NSString *)_aExt_ completion:(void ( ^ ) ( EMCallSession *aCallSession , EMError *aError ))_aCompletionBlock_

### Parameters
- **aType** (EMCallType) - The type of call to initiate (e.g., voice, video).
- **aRemoteName** (NSString *) - The username of the callee.
- **aExt** (NSString *) - Optional extension information to send with the call.
- **aCompletionBlock** (void ( ^ ) ( EMCallSession *aCallSession , EMError *aError )) - A block that is executed upon completion of the call initiation, providing the call session and any error.

### Discussion
This is a general method to start a call, supporting different call types.

## startVoiceCall:completion:

### Description
Initiates a voice call to a specified user.

### Method
- (void)startVoiceCall:(NSString *)_aUsername_ completion:(void ( ^ ) ( EMCallSession *aCallSession , EMError *aError ))_aCompletionBlock_

### Parameters
- **aUsername** (NSString *) - The username of the callee.
- **aCompletionBlock** (void ( ^ ) ( EMCallSession *aCallSession , EMError *aError )) - A block that is executed upon completion, providing the call session and any error.

### Discussion
Use this method for initiating standard voice calls.

## startVideoCall:completion:

### Description
Initiates a video call to a specified user.

### Method
- (void)startVideoCall:(NSString *)_aUsername_ completion:(void ( ^ ) ( EMCallSession *aCallSession , EMError *aError ))_aCompletionBlock_

### Parameters
- **aUsername** (NSString *) - The username of the callee.
- **aSuccessBlock** (void ( ^ ) ( EMCallSession *aCallSession , EMError *aError )) - A block that is executed upon completion, providing the call session and any error.

### Discussion
Use this method for initiating standard video calls.
```

--------------------------------

### startVideoRecord:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Starts recording the video stream and saves it to the specified file path.

```APIDOC
## startVideoRecord:

### Description
Start recording video.

### Method
`- (BOOL)startVideoRecord:(NSString *)_aPath_`

### Parameters
#### Path Parameters
- **aPath** (NSString *) - Description: File save path

### Discussion
Start recording video.
```

--------------------------------

### Install CocoaPods

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/README.md

Install CocoaPods using the RubyGems package manager. This is a prerequisite for managing iOS project dependencies.

```bash
$ gem install cocoapods
```

--------------------------------

### startVideoRecordingToFilePath:error:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Starts recording the video stream and saves it to a specified file path.

```APIDOC
## startVideoRecordingToFilePath:error:

### Description
Start recording video.

### Method
`- (void)startVideoRecordingToFilePath:(NSString *)_aPath_ error:(EMError **)_aError_`

### Parameters
#### Path Parameters
- **aPath** (NSString *) - Description: File saved path
- **aError** (EMError **) - Description: Error

### Discussion
Start recording video.
```

--------------------------------

### sharedClient

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Get the singleton instance of the EMClient.

```APIDOC
## sharedClient

### Description
Get SDK singleton instance.

### Method Signature
`+ (instancetype)sharedClient`
```

--------------------------------

### Get Chatroom Specification (Synchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Fetches a chatroom's specification from the server. This is a synchronous method that will block the current thread.

```APIDOC
## getChatroomSpecificationFromServerWithId:error:

### Description
Fetch chatroom’s specification.

### Method
`getChatroomSpecificationFromServerWithId:error:`

### Parameters
#### Path Parameters
- **aChatroomId** (NSString) - The ID of the chatroom.
- **pError** (EMError **) - Pointer to an EMError object for error details.

### Return Value
- **EMChatroom *** - Chatroom instance.

### Discussion
Synchronization method, will block the current thread.
```

--------------------------------

### Get Chatroom Announcement (Synchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Retrieves the announcement of a chatroom from the server synchronously. Returns the announcement string or an EMError.

```APIDOC
## getChatroomAnnouncementWithId:error:

### Description
Get the announcement of chatroom from the server.

### Method
`- (NSString *)getChatroomAnnouncementWithId:(NSString *)_aChatroomId_ error:(EMError **)_pError_`

### Parameters
- **aChatroomId** (NSString) - Chatroom id
- **pError** (EMError **) - error

### Return Value
The announcement of chatroom

### Discussion
Get the announcement of chatroom from the server.
```

--------------------------------

### noDisturbingStartH

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMPushOptions.html

Sets or gets the start hour for the Do Not Disturb mode.

```APIDOC
## Property: noDisturbingStartH

### Description
No disturbing mode start time (in hour).

### Type
`NSInteger`

### Declared In
`EMPushOptions.h`
```

--------------------------------

### initializeSDKWithOptions:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Initialize the Hyphenate SDK with the provided options.

```APIDOC
## initializeSDKWithOptions:

### Description
Initialize the SDK.

### Method Signature
`- (EMError *)initializeSDKWithOptions:(EMOptions *)_aOptions_`

### Parameters
*   **aOptions** (EMOptions *) - SDK setting options.

### Return Value
*   EMError - An error object if initialization fails, otherwise nil.
```

--------------------------------

### optionsWithAppkey:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMOptions.html

Initializes and returns an SDK settings options instance with the provided application key.

```APIDOC
## + optionsWithAppkey:(NSString *)_aAppkey_

### Description
Get a SDK setting options instance.

### Method
+

### Parameters
#### Parameters
- **aAppkey** (NSString *) - App‘s unique identifier

### Return Value
SDK’s setting options instance

### Discussion
Get a SDK setting options instance
```

--------------------------------

### init

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMChatroom.html

Initializes a chatroom instance. It is recommended to use `chatroomWithId:` instead.

```APIDOC
## - init

### Description
Initialize chatroom instance.

### Method
-

### Return Value
nil

### Discussion
Initialize chatroom instance
Please use [+chatroomWithId:]
```

--------------------------------

### Get Self IDs on Other Platform (Asynchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMContactManager.html

Get the ID list of the current account on another platform (Windows or Web) asynchronously.

```APIDOC
## getSelfIdsOnOtherPlatformWithCompletion:

### Description
Get the ID list of the current account on another platform (Windows or Web) asynchronously.

### Method
`- (void)getSelfIdsOnOtherPlatformWithCompletion:(void ( ^ ) ( NSArray *aList , EMError *aError ))_aCompletionBlock_`

### Parameters
#### Path Parameters
- **aCompletionBlock** (void (^)(NSArray *, EMError *)) - The callback block of completion, receiving the list of IDs and an error object.
```

--------------------------------

### Get Self IDs on Other Platform (Synchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMContactManager.html

Get the ID list of the current account on another platform (Windows or Web). This is a synchronous method.

```APIDOC
## getSelfIdsOnOtherPlatformWithError:

### Description
Get the ID list of the current account on another platform (Windows or Web).

### Method
`- (NSArray *)getSelfIdsOnOtherPlatformWithError:(EMError **)_pError_`

### Parameters
#### Path Parameters
- **pError** (EMError **) - Pointer to an EMError object to capture any errors.

### Return Value
- **NSArray** - A list of IDs on other platforms.
```

--------------------------------

### Load Messages

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMConversation.html

Loads messages from the local database starting from a specified message ID, with a given count and search direction. If the message ID is nil, loading starts from the latest message.

```APIDOC
## Load Messages

### Description
Loads messages from the local database starting from a specified message ID, with a given count and search direction. If the message ID is nil, loading starts from the latest message.

### Method Signature
- (void)loadMessagesStartFromId:(NSString *)_aMessageId_ count:(int)_aCount_ searchDirection:(EMMessageSearchDirection)_aDirection_ completion:(void ( ^ ) (NSArray *aMessages , EMError *aError ))_aCompletionBlock_

### Parameters
- **aMessageId** (NSString *) - The ID of the message to start loading from. If nil, starts from the latest message.
- **aCount** (int) - The maximum number of messages to load.
- **aDirection** (EMMessageSearchDirection) - The direction to search for messages (e.g., EMMessageSearchDirectionUp for messages before aMessageId, EMMessageSearchDirectionDown for messages after aMessageId).
- **aCompletionBlock** (void ( ^ ) (NSArray *aMessages , EMError *aError )) - A block that is executed upon completion, receiving an array of messages and an error object if any.
```

--------------------------------

### options

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Provides access to the SDK's configuration settings.

```APIDOC
## options

### Description
SDK setting options

### Property
`@property (nonatomic, strong, readonly) EMOptions *options`
```

--------------------------------

### loginWithUsername:password:completion:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Login to the IM server using username and password asynchronously.

```APIDOC
## loginWithUsername:password:completion:

### Description
Login with password.

### Method Signature
`- (void)loginWithUsername:(NSString *)_aUsername_ password:(NSString *)_aPassword_ completion:(void ( ^ ) ( NSString *aUsername , EMError *aError ))_aCompletionBlock_`

### Parameters
*   **aUsername** (NSString *) - The username for login.
*   **aPassword** (NSString *) - The password for login.
*   **aCompletionBlock** (void ( ^ ) ( NSString *aUsername , EMError *aError )) - The callback block executed upon completion.
```

--------------------------------

### currentUsername

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Gets the username of the currently logged-in user.

```APIDOC
## currentUsername

### Description
Current logged in user’s username

### Property
`@property (nonatomic, strong, readonly) NSString *currentUsername`
```

--------------------------------

### Initialization Methods

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMFileMessageBody.html

Methods to initialize an EMFileMessageBody instance.

```APIDOC
## Initialization Methods

### `initWithLocalPath:displayName:`

Initialize a file message body instance

`- (instancetype)initWithLocalPath:(NSString *)_aLocalPath_ displayName:(NSString *)_aDisplayName_`

**Parameters:**
- `aLocalPath` (NSString *) - Local path of the attachment
- `aDisplayName` (NSString *) - Display name of the attachment

**Return Value:**
File message body instance

**Discussion:**
Initialize a file message body instance

### `initWithData:displayName:`

Initialize a file message body instance

`- (instancetype)initWithData:(NSData *)_aData_ displayName:(NSString *)_aDisplayName_`

**Parameters:**
- `aData` (NSData *) - The data of attachment file
- `aDisplayName` (NSString *) - Display name of the attachment

**Return Value:**
File message body instance

**Discussion:**
Initialize a file message body instance
```

--------------------------------

### Get Video Width

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Retrieves the original video width.

```APIDOC
## getVideoWidth

### Description
Get video original width

### Method
`- (int)getVideoWidth`

### Return Value
Video original width
```

--------------------------------

### noDisturbingEndH

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMPushOptions.html

Sets or gets the end hour for the Do Not Disturb mode.

```APIDOC
## Property: noDisturbingEndH

### Description
No disturbing mode end time (in hour).

### Type
`NSInteger`

### Declared In
`EMPushOptions.h`
```

--------------------------------

### asyncAcceptJoinApplication

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Accepts a user's application to join a group. Requires owner's authority.

```APIDOC
## asyncAcceptJoinApplication:applicant:success:failure:

### Description
Accepts a user's application to join a group. Requires owner's authority.

### Method
`- (void)asyncAcceptJoinApplication:(NSString *)_aGroupId_ applicant:(NSString *)_aUsername_ success:(void ( ^ ) ( ))_aSuccessBlock_ failure:(void ( ^ ) ( EMError *aError ))_aFailureBlock_`

### Parameters
#### Path Parameters
* **aGroupId** (NSString) - Group id
* **aUsername** (NSString) - The applicant
* **aSuccessBlock** (void ( ^ ) ( )) - The callback block of success
* **aFailureBlock** (void ( ^ ) ( EMError *aError )) - The callback block of failure

### Discussion
Accept user’s application, need owner‘s authority
```

--------------------------------

### noDisturbStatus

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMPushOptions.html

Sets or gets the Do Not Disturb setting for notification messages.

```APIDOC
## Property: noDisturbStatus

### Description
No disturbing setting of notification message.

### Type
`EMPushNoDisturbStatus`

### Declared In
`EMPushOptions.h`
```

--------------------------------

### Initialize Group Instance

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMGroup.html

Initializes a group instance. It is recommended to use `+groupWithId:` instead.

```APIDOC
## Initialize Group Instance

### Description
Initialize a group instance.

### Discussion
Please use `+groupWithId:`.

### Return Value
- **nil** (object) - Returns nil.
```

--------------------------------

### displayStyle

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMPushOptions.html

Sets or gets the display style of the notification message.

```APIDOC
## Property: displayStyle

### Description
Display style of notification message.

### Type
`EMPushDisplayStyle`

### Declared In
`EMPushOptions.h`
```

--------------------------------

### Initialization

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMImageMessageBody.html

Initializes an image message body instance with the original image data and optional thumbnail data.

```APIDOC
## Initialization

### Description
Initializes an image message body instance with the original image data and optional thumbnail data.

### Method
- (instancetype)initWithData:(NSData *)_aData_ thumbnailData:(NSData *)_aThumbnailData_

### Parameters
#### Parameters
- **aData** (NSData *) - Original image object in NSData format.
- **aThumbnailData** (NSData *) - Thumbnail in NSData format. Will not push to server, but only for local usage.

### Return Value
An image message body instance.
```

--------------------------------

### groupWithId:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMGroup.html

Get group instance, create a instance if it does not exist.

```APIDOC
## `+ groupWithId:`

Get group instance, create a instance if it does not exist.

`+ (instancetype)groupWithId:(NSString *)_aGroupId_`
```

--------------------------------

### Create Chatroom (Asynchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Creates a chatroom asynchronously with specified details. The result is returned via a completion block.

```APIDOC
## createChatroomWithSubject:description:invitees:message:maxMembersCount:completion:

### Description
Create a group.

### Method
`createChatroomWithSubject:description:invitees:message:maxMembersCount:completion:`

### Parameters
#### Path Parameters
- **aSubject** (NSString) - Group subject.
- **aDescription** (NSString) - Group description.
- **aInvitees** (NSArray) - Group members, without creater.
- **aMessage** (NSString) - Invitation message.
- **aMaxMembersCount** (NSInteger) - Max members count.
- **aCompletionBlock** (void ( ^ ) ( EMChatroom *aChatroom , EMError *aError )) - The callback block of completion.

### Discussion
Create a group.
```

--------------------------------

### registerWithUsername:password:completion:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Register a new IM user asynchronously. It is highly recommended to use the REST API for registration from your backend for better reliability.

```APIDOC
## registerWithUsername:password:completion:

### Description
Register a new IM user.

### Method Signature
`- (void)registerWithUsername:(NSString *)_aUsername_ password:(NSString *)_aPassword_ completion:(void ( ^ ) ( NSString *aUsername , EMError *aError ))_aCompletionBlock_`

### Parameters
*   **aUsername** (NSString *) - The desired username.
*   **aPassword** (NSString *) - The password for the new user.
*   **aCompletionBlock** (void ( ^ ) ( NSString *aUsername , EMError *aError )) - The callback block executed upon completion.

### Note
To ensure good reliability, registering new IM user via REST API from developer backend is highly recommended.
```

--------------------------------

### Get Chatroom Announcement

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Retrieves the announcement for a specified chatroom from the server.

```APIDOC
## getChatroomAnnouncementWithId:completion:

### Description
Get the announcement of chatroom from the server.

### Method
`- (void)getChatroomAnnouncementWithId:(NSString *)_aChatroomId_ completion:(void ( ^ ) ( NSString *aAnnouncement , EMError *aError ))_aCompletionBlock_`

### Parameters
* **aChatroomId** (NSString) - Chatroom id
* **aCompletionBlock** (void (^)(NSString *aAnnouncement, EMError *aError)) - The callback block of completion
```

--------------------------------

### asyncGetMyGroupsFromServer

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Fetches all of the user's groups from the server, updating both memory and the database upon success.

```APIDOC
## asyncGetMyGroupsFromServer

### Description
Get all of user’s groups from server, will update group list in memory and DB after success.

### Method
`- (void)asyncGetMyGroupsFromServer:(void ( ^ ) ( NSArray *aList ))_aSuccessBlock_ failure:(void ( ^ ) ( EMError *aError ))_aFailureBlock_`

### Parameters
* `aSuccessBlock` - The callback block of success.
* `aFailureBlock` - The callback block of failure.

### Discussion
Get all of user’s groups from server, will update group list in memory and DB after success.

### Declared In
`IEMGroupManager.h`
```

--------------------------------

### Get Contacts from Server (Asynchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMContactManager.html

Retrieve all contacts from the server asynchronously.

```APIDOC
## asyncGetContactsFromServer:failure:

### Description
Get all the friends from the server asynchronously.

### Method
`- (void)asyncGetContactsFromServer:(void ( ^ ) ( NSArray *aList ))_aSuccessBlock_ failure:(void ( ^ ) ( EMError *aError ))_aFailureBlock_`

### Parameters
#### Path Parameters
- **aSuccessBlock** (void (^)(NSArray *)) - The callback block executed on successful retrieval of contacts.
- **aFailureBlock** (void (^)(EMError *)) - The callback block executed if an error occurs during retrieval.
```

--------------------------------

### Get Blacklist from DB

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMContactManager.html

Retrieve the blacklist of users from the local database.

```APIDOC
## getBlackListFromDB

### Description
Get the blacklist of users from the local database.

### Method
`- (NSArray *)getBlackListFromDB`

### Return Value
- **NSArray** - A list of users in the blacklist.
```

--------------------------------

### getLoggedInDevicesFromServerWithUsername:password:error:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Retrieves all device information for logged-in users from the server. This is a synchronous operation.

```APIDOC
## getLoggedInDevicesFromServerWithUsername:password:error:

### Description
Get all the device information [EMDeviceConfig](../Classes/EMDeviceConfig.html) that logged in to the server.

### Method
`- (NSArray *)getLoggedInDevicesFromServerWithUsername:(NSString *)_aUsername_ password:(NSString *)_aPassword_ error:(EMError **)_pError_`

### Parameters
* `aUsername` - The username for authentication.
* `aPassword` - The password for authentication.
* `pError` - Pointer to an EMError object to store any error information.

### Return Value
An array of EMDeviceConfig objects representing logged-in devices.

### Discussion
Synchronization method will block the current thread.
```

--------------------------------

### asyncAddOccupants:toGroup:welcomeMessage:success:failure:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Invites users to join a specified group. Requires owner's authority. A welcome message can be included.

```APIDOC
## asyncAddOccupants:toGroup:welcomeMessage:success:failure:

### Description
Invite User to join a group.

### Method
Objective-C

### Parameters
- **aOccupants** (NSArray) - Invited users
- **aGroupId** (NSString) - Group id
- **aWelcomeMessage** (NSString) - Welcome message
- **aSuccessBlock** (void (^)(EMGroup *aGroup)) - The callback block of success
- **aFailureBlock** (void (^)(EMError *aError)) - The callback block of failure

### Discussion
Invite User to join a group
```

--------------------------------

### Get Contacts from DB

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMContactManager.html

Retrieve all contacts stored in the local database.

```APIDOC
## getContactsFromDB

### Description
Get all the friends from the local database.

### Method
`- (NSArray *)getContactsFromDB`

### Return Value
- **NSArray** - A list of contacts.
```

--------------------------------

### getAllChatroomsFromServerWithCompletion

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Asynchronously retrieves all chatrooms from the server.

```APIDOC
## getAllChatroomsFromServerWithCompletion:

### Description
Get all the chatrooms from server.

### Method
`- (void)getAllChatroomsFromServerWithCompletion:(void ( ^ ) ( NSArray *aList , EMError *aError ))_aCompletionBlock_`

### Parameters
#### Path Parameters
* **_aCompletionBlock_** (void ( ^ ) (NSArray *aList , EMError *aError)) - The callback block of completion.
  * **aList** (NSArray) - The list of chatrooms.
  * **aError** (EMError) - An error object if the operation failed.
```

--------------------------------

### Get Voice Volume

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Retrieves the current voice volume of the call.

```APIDOC
## getVoiceVolume

### Description
Get voice volume of the call

### Method
`- (int)getVoiceVolume`

### Return Value
Volume
```

--------------------------------

### Call Extension

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Gets the call extension. The type must be NSString.

```APIDOC
## ext

### Description
Call extention

Type must be NSString

### Property
`@property (nonatomic, readonly) NSString *ext`
```

--------------------------------

### asyncFetchChatroomInfo

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Asynchronously fetches the specification of a chatroom, optionally including the members list.

```APIDOC
## asyncFetchChatroomInfo:includeMembersList:success:failure:

### Description
Fetch chatroom’s specification.

### Method
`- (void)asyncFetchChatroomInfo:(NSString *)_aChatroomId_ includeMembersList:(BOOL)_aIncludeMembersList_ success:(void ( ^ ) ( EMChatroom *aChatroom ))_aSuccessBlock_ failure:(void ( ^ ) ( EMError *aError ))_aFailureBlock_`

### Parameters
#### Path Parameters
* **_aChatroomId_** (NSString) - Required - Chatroom id
* **_aIncludeMembersList_** (BOOL) - Required - Whether get member list
* **_aSuccessBlock_** (void ( ^ ) (EMChatroom *aChatroom)) - The callback block of success.
  * **aChatroom** (EMChatroom) - The fetched chatroom object.
* **_aFailureBlock_** (void ( ^ ) (EMError *aError)) - The callback block of failure.
  * **aError** (EMError) - An error object if the operation failed.
```

--------------------------------

### applicationDidEnterBackground:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Handles the application entering the background state by disconnecting from the server.

```APIDOC
## applicationDidEnterBackground:

### Description
Disconnect from server when app enters background.

### Method
Called when the application transitions to the background.

### Parameters
#### Path Parameters
- **aApplication** (id) - The application object (UIApplication).
```

--------------------------------

### Get Public Groups From Server

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Methods for retrieving public groups from the server.

```APIDOC
## asyncGetPublicGroupsFromServerWithCursor:pageSize:success:failure:

### Description
Asynchronously retrieves public groups from the server using cursor-based pagination.

### Parameters
- **cursor** (NSString *) - The cursor for pagination.
- **pageSize** (NSInteger) - The number of groups per page.
- **success** (void (^)(NSArray *groups, NSString *cursor, EMError *error)) - A block that is called with the list of groups and the next cursor.
- **failure** (void (^)(EMError *error)) - A block that is called when the operation fails.

## getPublicGroupsFromServerWithCursor:pageSize:completion:

### Description
Retrieves public groups from the server using cursor-based pagination.

### Parameters
- **cursor** (NSString *) - The cursor for pagination.
- **pageSize** (NSInteger) - The number of groups per page.
- **completion** (void (^)(NSArray *groups, NSString *cursor, EMError *error)) - A block that is called with the list of groups and the next cursor.

## getPublicGroupsFromServerWithCursor:pageSize:error:

### Description
Retrieves public groups from the server using cursor-based pagination and handles potential errors.

### Parameters
- **cursor** (NSString *) - The cursor for pagination.
- **pageSize** (NSInteger) - The number of groups per page.
- **error** (EMError *) - An error object if the operation fails.
```

--------------------------------

### Create Chatroom (Synchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Creates a chatroom with specified details. This is a synchronous method that will block the current thread.

```APIDOC
## createChatroomWithSubject:description:invitees:message:maxMembersCount:error:

### Description
Create a chatroom.

### Method
`createChatroomWithSubject:description:invitees:message:maxMembersCount:error:`

### Parameters
#### Path Parameters
- **aSubject** (NSString) - Subject of the chatroom.
- **aDescription** (NSString) - Description of the chatroom.
- **aInvitees** (NSArray) - Members to invite (excluding the creator).
- **aMessage** (NSString) - Invitation message.
- **aMaxMembersCount** (NSInteger) - Maximum number of members allowed in the chatroom.
- **pError** (EMError **) - Pointer to an EMError object for error details.

### Return Value
- **EMChatroom *** - The created chatroom object.

### Discussion
Synchronization method will block the current thread.
```

--------------------------------

### Get Last Received Message

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMConversation.html

Retrieves the last received message in the conversation.

```APIDOC
## Get Last Received Message

### `lastReceivedMessage`

Retrieves the last received message.

`- (EMMessage *)lastReceivedMessage`

#### Return Value

Message instance.
```

--------------------------------

### Get Video Lost Rate

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Retrieves the video package lost rate.

```APIDOC
## getVideoLostRateInPercent

### Description
Get video package lost rate

### Method
`- (int)getVideoLostRateInPercent`

### Return Value
Video package lost rate
```

--------------------------------

### asyncRegisterWithUsername:password:success:failure:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Asynchronously registers a new user with the specified username and password. Provides callbacks for success and failure.

```APIDOC
## asyncRegisterWithUsername:password:success:failure:

### Description
Register a new user.

### Method
Asynchronous method for user registration.

### Parameters
#### Path Parameters
- **aUsername** (NSString) - Username for the new user.
- **aPassword** (NSString) - Password for the new user.
- **aSuccessBlock** (void (^)(void)) - The callback block executed on successful registration.
- **aFailureBlock** (void (^)(EMError *aError)) - The callback block executed on registration failure, providing an error object.
```

--------------------------------

### Accept Join Application

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Methods for accepting applications to join a group.

```APIDOC
## acceptJoinApplication:applicant:

### Description
Accepts an application from a user to join a group.

### Parameters
- **groupId** (NSString *) - The ID of the group.
- **applicant** (NSString *) - The identifier of the applicant.

## asyncAcceptJoinApplication:applicant:success:failure:

### Description
Asynchronously accepts an application from a user to join a group.

### Parameters
- **groupId** (NSString *) - The ID of the group.
- **applicant** (NSString *) - The identifier of the applicant.
- **success** (void (^)(EMGroup *group)) - A block that is called when the operation succeeds.
- **failure** (void (^)(EMError *error)) - A block that is called when the operation fails.
```

--------------------------------

### Get My Groups From Server

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Methods for retrieving the current user's groups from the server.

```APIDOC
## asyncGetMyGroupsFromServer:failure:

### Description
Asynchronously retrieves all groups the current user is a member of from the server.

### Parameters
- **failure** (void (^)(EMError *error)) - A block that is called when the operation fails.

## getMyGroupsFromServerWithError:

### Description
Retrieves all groups the current user is a member of from the server and handles potential errors.

### Parameters
- **error** (EMError *) - An error object if the operation fails.

## getJoinedGroupsFromServerWithCompletion:

### Description
Retrieves all groups the current user has joined from the server.

### Parameters
- **completion** (void (^)(NSArray *groups, EMError *error)) - A block that is called with the list of groups.

## getJoinedGroupsFromServerWithPage:pageSize:completion:

### Description
Retrieves groups the current user has joined from the server with pagination.

### Parameters
- **pageNumber** (NSInteger) - The page number to retrieve.
- **pageSize** (NSInteger) - The number of groups per page.
- **completion** (void (^)(NSArray *groups, EMError *error)) - A block that is called with the list of groups.

## getJoinedGroupsFromServerWithPage:pageSize:error:

### Description
Retrieves groups the current user has joined from the server with pagination and handles potential errors.

### Parameters
- **pageNumber** (NSInteger) - The page number to retrieve.
- **pageSize** (NSInteger) - The number of groups per page.
- **error** (EMError *) - An error object if the operation fails.

## getJoinedGroups

### Description
Retrieves all groups the current user has joined.
```

--------------------------------

### Configure Podfile for Hyphenate SDK

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/README.md

Add the Hyphenate SDK dependency to your project's Podfile. Ensure you are using the correct spec repository source.

```ruby
source 'https://github.com/CocoaPods/Specs.git'

target 'projectTarget' do
  pod 'Hyphenate'
end
```

--------------------------------

### Get Video Latency

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Retrieves the video latency in milliseconds, which changes in real time.

```APIDOC
## getVideoLatency

### Description
Get video latency, in milliseconds, changing in real time

### Method
`- (int)getVideoLatency`

### Return Value
The delay time
```

--------------------------------

### Make Video Call

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMCallManager.html

Initiates a video call to a specified username.

```APIDOC
## makeVideoCall:error:

### Description
Start a video call session

### Method
- (EMCallSession *)makeVideoCall:(NSString *)_aUsername_ error:(EMError **)_pError_

### Parameters
#### Path Parameters
- **aUsername** (NSString) - Required - The callee's username
- **pError** (EMError **) - Required - Error object to capture any errors

### Return Value
- EMCallSession - Session instance

### Discussion
Start a video call session
```

--------------------------------

### Get Group Instance

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMGroup.html

Retrieves a group instance by its ID. If the group does not exist, it will be created.

```APIDOC
## Get Group Instance

### Description
Get group instance, create a instance if it does not exist.

### Parameters
#### Path Parameters
- **aGroupId** (string) - Required - Group id

### Return Value
- **Group instance** (object) - Description of the returned group instance.
```

--------------------------------

### kickAllDevicesWithUsername:password:completion:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Asynchronously forces all logged-in devices for a specified user to log out. A completion block is provided to handle the result of the operation.

```APIDOC
## kickAllDevicesWithUsername:password:completion:

### Description
Force all logged in device to logout.

### Method
Asynchronous method.

### Parameters
#### Path Parameters
- **aUsername** (NSString) - Username
- **aPassword** (NSString) - Password
- **aCompletionBlock** (void (^)(EMError *aError)) - The callback block of completion.

### Return Value
None.
```

--------------------------------

### getLoggedInDevicesFromServerWithUsername:password:completion:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Retrieves all device information for logged-in users from the server asynchronously.

```APIDOC
## getLoggedInDevicesFromServerWithUsername:password:completion:

### Description
Get all the device information [EMDeviceConfig](../Classes/EMDeviceConfig.html) that logged in to the server.

### Method
`- (void)getLoggedInDevicesFromServerWithUsername:(NSString *)_aUsername_ password:(NSString *)_aPassword_ completion:(void ( ^ ) ( NSArray *aList , EMError *aError ))_aCompletionBlock_`

### Parameters
* `aUsername` - The username for authentication.
* `aPassword` - The password for authentication.
* `aCompletionBlock` - The callback block of completion, receiving a list of logged-in devices and an error object.
```

--------------------------------

### registerWithUsername:password:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Register a new IM user with a username and password. It is highly recommended to use the REST API for registration from your backend for better reliability.

```APIDOC
## registerWithUsername:password:

### Description
Register a new IM user.

### Method Signature
`- (EMError *)registerWithUsername:(NSString *)_aUsername_ password:(NSString *)_aPassword_`

### Parameters
*   **aUsername** (NSString *) - The desired username.
*   **aPassword** (NSString *) - The password for the new user.

### Return Value
*   EMError - An error object if registration fails, otherwise nil.

### Note
To ensure good reliability, registering new IM user via REST API from developer backend is highly recommended.
```

--------------------------------

### Get Video Frame Rate

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Retrieves the video frame rate, which changes in real time.

```APIDOC
## getVideoFrameRate

### Description
Get video frame rate, changing in real time

### Method
`- (int)getVideoFrameRate`

### Return Value
The video frame rate
```

--------------------------------

### Get Group Specification (Asynchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Fetches group specification from the server asynchronously using a completion block.

```APIDOC
## getGroupSpecificationFromServerWithId:completion:

### Description
Fetch group specification, including: ID, name, description, setting, owner, admins.

### Method
`- (void)getGroupSpecificationFromServerWithId:(NSString *)_aGroupId_ completion:(void ( ^ ) ( EMGroup *aGroup , EMError *aError ))_aCompletionBlock_`

### Parameters
* **aGroupId** (NSString) - Group id
* **aCompletionBlock** (void ( ^ ) ( EMGroup *aGroup , EMError *aError )) - The callback block of completion

### Discussion
Fetch group specification, including: ID, name, description, setting, owner, admins.
```

--------------------------------

### displayName

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMPushOptions.html

Sets or gets the user's nickname to be displayed in Apple Push Notification service messages.

```APIDOC
## Property: displayName

### Description
User’s nickname to be displayed in apple push notification service messages.

### Type
`NSString *`

### Declared In
`EMPushOptions.h`
```

--------------------------------

### uploadDebugLogToServerWithCompletion:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Uploads the debugging log to the server asynchronously.

```APIDOC
## uploadDebugLogToServerWithCompletion:

### Description
Upload debugging log to server.

### Method
`- (void)uploadDebugLogToServerWithCompletion:(void ( ^ ) ( EMError *aError ))_aCompletionBlock_`

### Parameters
* `aCompletionBlock` - The callback of completion block.
```

--------------------------------

### asyncLoginWithUsername:password:success:failure:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Asynchronously logs in a user with the provided username and password. Callbacks are provided for success and failure scenarios.

```APIDOC
## asyncLoginWithUsername:password:success:failure:

### Description
Login.

### Method
Asynchronous method for user login.

### Parameters
#### Path Parameters
- **aUsername** (NSString) - Username for login.
- **aPassword** (NSString) - Password for login.
- **aSuccessBlock** (void (^)(void)) - The callback block executed on successful login.
- **aFailureBlock** (void (^)(EMError *aError)) - The callback block executed on login failure, providing an error object.
```

--------------------------------

### EMOptions Properties

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMOptions.html

Configuration options for the Hyphenate SDK.

```APIDOC
## EMOptions Properties

### Description

Properties to configure the Hyphenate SDK settings.

### Properties

- **appkey** (NSString *) - Readonly - Application’s unique identifier.
- **enableConsoleLog** (BOOL) - Whether print log to console, default is NO.
- **logLevel** (EMLogLevel) - Log output level, default is EMLogLevelDebug.
- **usingHttpsOnly** (BOOL) - Whether using https only, default is NO.
- **isAutoLogin** (BOOL) - Whether auto login, default is YES. Value is saved locally. When initializing the EMOptions, SDK looks for the local value first.
- **isDeleteMessagesWhenExitGroup** (BOOL) - Whether to delete all the group messages when leaving the group, default is YES.
- **isDeleteMessagesWhenExitChatRoom** (BOOL) - Whether to delete all the chat room messages when leaving the chat room, default is YES.
- **isChatroomOwnerLeaveAllowed** (BOOL) - If allow chat room’s owner can leave the chat room, default is YES.
- **isAutoAcceptGroupInvitation** (BOOL) - Whether to automatically accept group invitation, default is YES.
- **isAutoAcceptFriendInvitation** (BOOL) - Whether to automatically approve friend request, default is NO.
- **enableDeliveryAck** (BOOL) - Whether to send delivery acknowledgement, default is NO. If set to YES, SDK will automatically send a delivery acknowledgement when receiving a chat message.
- **sortMessageByServerTime** (BOOL) - Whether to sort messages by server received time when loading message from database, default is YES.
- **apnsCertName** (NSString *) - Certificate name of Apple Push Notification Service.
```

--------------------------------

### Get Group Blacklist (Synchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Retrieves the blacklist of a group from the server. Requires owner or admin permissions. This is a synchronous method.

```APIDOC
## getGroupBlacklistFromServerWithId:pageNumber:pageSize:error:

### Description
Get the blacklist of group from the server, need owner / admin permissions.

### Method
`- (NSArray *)getGroupBlacklistFromServerWithId:(NSString *)_aGroupId_ pageNumber:(NSInteger)_aPageNum_ pageSize:(NSInteger)_aPageSize_ error:(EMError **)_pError_`

### Parameters
* **aGroupId** (NSString) - Group id
* **aPageNum** (NSInteger) - Page number
* **aPageSize** (NSInteger) - Page size
* **pError** (EMError **) - Error

### Discussion
Get the blacklist of group from the server, need owner / admin permissions.
```

--------------------------------

### Get Group Member List (Asynchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Retrieves a list of group members from the server asynchronously using a completion block.

```APIDOC
## getGroupMemberListFromServerWithId:cursor:pageSize:completion:

### Description
Get the list of group members from the server.

### Method
`- (void)getGroupMemberListFromServerWithId:(NSString *)_aGroupId_ cursor:(NSString *)_aCursor_ pageSize:(NSInteger)_aPageSize_ completion:(void ( ^ ) ( EMCursorResult *aResult , EMError *aError ))_aCompletionBlock_`

### Parameters
* **aGroupId** (NSString) - Group id
* **aCursor** (NSString) - Cursor, input nil the first time
* **aPageSize** (NSInteger) - Page size
* **aCompletionBlock** (void ( ^ ) ( EMCursorResult *aResult , EMError *aError )) - The callback block of completion

### Discussion
Get the list of group members from the server.
```

--------------------------------

### asyncUploadLogToServer

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Uploads logs to the server. This asynchronous method uses callbacks for success and failure.

```APIDOC
## asyncUploadLogToServer:failure:

### Description
Uploads logs to the server.

### Method
`- (void)asyncUploadLogToServer:(void ( ^ ) ( ))aSuccessBlock_ failure:(void ( ^ ) ( EMError *aError ))aFailureBlock_`

### Parameters
#### Path Parameters
* **aSuccessBlock** (void ( ^ ) ( )) - The callback block of success
* **aFailureBlock** (void ( ^ ) ( EMError *aError )) - The callback block of failure
```

--------------------------------

### Get Group Member List (Synchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMGroupManager.html

Retrieves a list of group members from the server using pagination. This is a synchronous method.

```APIDOC
## getGroupMemberListFromServerWithId:cursor:pageSize:error:

### Description
Get the list of group members from the server.

### Method
`- (EMCursorResult *)getGroupMemberListFromServerWithId:(NSString *)_aGroupId_ cursor:(NSString *)_aCursor_ pageSize:(NSInteger)_aPageSize_ error:(EMError **)_pError_`

### Parameters
* **aGroupId** (NSString) - Group id
* **aCursor** (NSString) - Cursor, input nil the first time
* **aPageSize** (NSInteger) - Page size
* **pError** (EMError **) - Error

### Return Value
List and cursor (EMCursorResult *)

### Discussion
Get the list of group members from the server.
```

--------------------------------

### loginWithUsername:password:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Login to the IM server using username and password. This is a synchronous method and will block the current thread.

```APIDOC
## loginWithUsername:password:

### Description
Login with password.

### Method Signature
`- (EMError *)loginWithUsername:(NSString *)_aUsername_ password:(NSString *)_aPassword_`

### Parameters
*   **aUsername** (NSString *) - The username for login.
*   **aPassword** (NSString *) - The password for login.

### Return Value
*   EMError - An error object if login fails, otherwise nil.

### Discussion
Synchronization method will block the current thread.
```

--------------------------------

### asyncGetPushOptionsFromServer

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Retrieves APNS options from the server. This asynchronous method uses callbacks for success and failure.

```APIDOC
## asyncGetPushOptionsFromServer:failure:

### Description
Retrieves APNS options from the server.

### Method
`- (void)asyncGetPushOptionsFromServer:(void ( ^ ) ( EMPushOptions *aOptions ))aSuccessBlock_ failure:(void ( ^ ) ( EMError *aError ))aFailureBlock_`

### Parameters
#### Path Parameters
* **aSuccessBlock** (void ( ^ ) ( EMPushOptions *aOptions )) - The callback block of success
* **aFailureBlock** (void ( ^ ) ( EMError *aError )) - The callback block of failure
```

--------------------------------

### Get Push Notification Options From Server (Asynchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Retrieves Apple Push Notification Service options from the server asynchronously.

```APIDOC
## getPushNotificationOptionsFromServerWithCompletion:

### Description
Retrieves Apple Push Notification Service options from the server asynchronously.

### Method
`- (void)getPushNotificationOptionsFromServerWithCompletion:(void ( ^ ) ( EMPushOptions *aOptions , EMError *aError ))_aCompletionBlock_`

### Parameters
*   **aCompletionBlock** (void ( ^ ) ( EMPushOptions *aOptions , EMError *aError )) - The callback block executed upon completion, receiving options and error.
```

--------------------------------

### getChatroomsFromServerWithPage:pageSize:completion:

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMChatroomManager.html

Asynchronously retrieves a specified number of chatrooms from the server using a completion block.

```APIDOC
## getChatroomsFromServerWithPage:pageSize:completion:

### Description
Asynchronously retrieves a specified number of chatrooms from the server using a completion block.

### Method
- (void)getChatroomsFromServerWithPage:(NSInteger)_aPageNum_ pageSize:(NSInteger)_aPageSize_ completion:(void ( ^ ) ( EMPageResult *aResult , EMError *aError ))_aCompletionBlock_

### Parameters
- **aPageNum** (NSInteger) - Page number
- **aPageSize** (NSInteger) - Page size
- **aCompletionBlock** (void ( ^ ) ( EMPageResult *aResult , EMError *aError )) - The callback block of completion

### Declared In
IEMChatroomManager.h
```

--------------------------------

### Get Push Options From Server (Synchronous)

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMClient.html

Retrieves Apple Push Notification Service options from the server. This is a synchronous method.

```APIDOC
## getPushOptionsFromServerWithError:

### Description
Retrieves Apple Push Notification Service options from the server. This is a synchronization method that will block the current thread.

### Method
`- (EMPushOptions *)getPushOptionsFromServerWithError:(EMError **)_pError_`

### Parameters
*   **pError** (EMError **) - A pointer to an EMError object to capture any errors.

### Return Value
EMPushOptions - The retrieved push notification options.
```

--------------------------------

### asyncGetBlackListFromServer

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Protocols/IEMContactManager.html

Retrieves the blacklist of users from the server.

```APIDOC
## asyncGetBlackListFromServer

### Description
Get the blacklist from the server.

### Method
Asynchronous method.

### Parameters
- **aSuccessBlock** (void (^)(NSArray *aList)) - Required - The callback block of success.
- **aFailureBlock** (void (^)(EMError *aError)) - Required - The callback block of failure.

### Discussion
Get the blacklist from the server.
```

--------------------------------

### Remote Video Resolution

Source: https://github.com/hyphenateinc/hyphenate-sdk-ios/blob/master/HyphenateSDK/doc/Classes/EMCallSession.html

Gets the remote video resolution. Returns ({-1, 1}) if no data is available, typically after a few seconds of calling.

```APIDOC
## remoteVideoResolution

### Description
Remote video resolution return (-1, 1) if no data is available. Usually no data until few seconds of calling later.

### Property
`@property (nonatomic, readonly) CGSize remoteVideoResolution`
```