AliyunMixRecorderDelegate

@protocol AliyunMixRecorderDelegate <AliyunIRecorderDelegate>

/**
 mixRecord的视频拼接开始
 */
- (void)mixRecorderComposerDidStart;

/**
 mixRecord的视频拼接进度

 @param progress 进度
 */
- (void)mixRecorderComposerOnProgress:(CGFloat)progress;

/**
 mixRecord的视频拼接完成
 */
- (void)mixRecorderComposerDidComplete;

/**
 mixRecord的视频拼接异常错误

 @param errorCode 错误码
 */
- (void)mixRecorderComposerDidError:(int)errorCode;

@end