/**
 有人加入会议
 @param uid  加入用户ID
 @param meetingID  会议ID
 @return 用于显示发言者视频画面的view
 */
- (UIView *)onJoined:(NSString *)uid meeting:(NSString *)meetingID
{
}
/**
 有人离开会议
 @param uid  离开用户ID
 @param meetingID  会议ID
 */
- (void)onLeft:(NSString *)uid meeting:(NSString *)meetingID
{
}
@optional

/**
 一些异常情况可能会引起会议出错，请在收到该回调后主动离开会议
 @param error  错误信息
 @param meetingID  会议ID
 */
- (void)onMeetingError:(NSError *)error meeting:(NSString *)meetingID
{
}

/**
 成员数发生变化
 
 @param membersNumber 成员数
 */
- (void)meetingMembersNumberUpdated:(NSInteger)membersNumber
{
}
/**
 自己被剔
 */
- (void)meetingUserKicked
{
}
/**
 收到消息
 
 @param message 消息
 @param fromID  消息来源
 */
- (void)meetingMessageReceived:(NSString *)message fromID:(NSString *)fromID
{
}
/**
 收到私信消息
 
 @param message 消息
 @param fromID  消息来源
 */
- (void)meetingPrivateMessageReceived:(NSString *)message fromID:(NSString *)fromID
{
}

/**
 设置视频参数
 
 @param config 参数
 */
- (void)setVideoConfig:(XHVideoConfig *)config;
/**
 创建会议
 */
- (void)createMeeting:(XHMeetingItem *)meetingItem completion:(void(^)(NSString *meetingID ,NSError *error))completion;

/**
 加入会议
 */
- (void)joinMeeting:(NSString *)meetingID completion:(void(^)(NSError *error))completion;

/**
 离开会议
 */
- (void)leaveMeeting:(NSString *)meetingID completion:(void(^)(NSError *error))completion;

/**
 返回切换后的摄像头方向
 
 @return 切换后的摄像头方向
 */
- (XHCameraDirection)switchCamera;

/**
 切换到大视频预览页面
 */
- (void)changeToBigPreview:(UIView *)view;
/**
 切换到小视频预览页面
 */
- (void)changeToSmall:(UIView *)view;


/**
 发送消息
 
 @param message 消息
 @param completion 回调
 */
- (void)sendMessage:(NSString *)message completion:(void(^)(NSError *error))completion;

/**
 发送私信消息
 
 @param message 消息
 @param toID 收件人id
 @param completion 回调
 */
- (void)sendMessage:(NSString *)message toID:(NSString *)toID completion:(void(^)(NSError *error))completion;

/**
 禁言

 @param member 用户id
 @param seconds 禁言时长，单位为秒
 @param meetingId 会议id
 @param completion 回调
 */
- (void)muteMember:(NSString*)member
        muteSeconds:(NSInteger)seconds
       frommeeting:(NSString *)meetingId
         completion:(void(^)(NSError *error))completion;

/**
 解除禁言

 @param members 用户id，可以是多个用户
 @param meetingId 会议id
 @param completion 回调
 */
- (void)unMuteMembers:(NSArray<NSString *> *)members
         frommeeting:(NSString *)meetingId
           completion:(void(^)(NSError *error))completion;

/**
 剔除用户

 @param member 用户id
 @param meetingId 会议id
 @param completion 回调
 */
- (void)kickMember:(NSString *)member
         frommeeting:(NSString *)meetingId
           completion:(void(^)(NSError *error))completion;