iOS IM消息声音连声用延时解决

最近做IM消息, 接受到很多消息时, 如果播放声音, 会造成持续的连声, 可以这样解决, 用延时来做, 记录下 !

//注册声音

- (void)registerSystemSound

{

   NSString *path1 = [[NSBundlemainBundle] pathForResource:@"sendmsg"ofType:@"caf"];

   NSString *path2 = [[NSBundlemainBundle] pathForResource:@"in"ofType:@"caf"];

   //注册声音到系统

   CFURLRef url1 = (__bridgeCFURLRef)[NSURLfileURLWithPath:path1];

   AudioServicesCreateSystemSoundID(url1,&sendmsg_sound_id);

    

   CFURLRef url2 = (__bridgeCFURLRef)[NSURLfileURLWithPath:path2];

   AudioServicesCreateSystemSoundID(url2,&receive_sound_id);

}

//播放声音

- (void)playSound:(int)type

{

    if(_isSoundPlaying) {

       return;

    };

    

   _isSoundPlaying = YES;

     //这个是重点

    [selfdelayExecutePlaySoundTimeInterval:20.fcompletionCallBack:^{

       _isSoundPlaying = NO;

    }];

        //添加音频结束时的回调

       AudioServicesAddSystemSoundCompletion(sendmsg_sound_id,NULL, NULL,completionCallback, (__bridgevoid *)(self));

       AudioServicesPlaySystemSound(sendmsg_sound_id);

}

//这样是每次都要注册一个声音, 播放完就注销了, 个人不建议这么做, 这个注销的可以写在dealloc中, 就是声音只需要注册一次就够了

staticvoid completionCallback (SystemSoundID  mySSID,void* clientData)

{

   // 在播放结束后循环播放

//    AudioServicesPlaySystemSound(mySSID);

    // 移除完成后执行的函数
    AudioServicesRemoveSystemSoundCompletion(mySSID);
    
    // 释放声音对象以及相关的所有资源
    AudioServicesDisposeSystemSoundID(mySSID);

}

//延时操作

-(void)delayExecutePlaySoundTimeInterval:(CGFloat)timeInterval completionCallBack:(void(^)(void))completionBlock {

    dispatch_time_t popTime =dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeInterval *NSEC_PER_SEC));

    dispatch_after(popTime,dispatch_get_main_queue(), ^(void){

        completionBlock();

    });

}