iOS中关于音乐锁屏控制音乐(锁屏信息设置)的实例代码

appDelegate里面加入如下代码获取后台播放权限

- (void)setAudioBackstagePlay{
  AVAudioSession *audioSession = [AVAudioSession sharedInstance];
  [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
  [audioSession setActive:YES error:nil];
}

//重写父类方法，接受外部事件的处理
- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {
  NSLog(@"remote");
  if(receivedEvent.type == UIEventTypeRemoteControl) {
    switch(receivedEvent.subtype) {// 得到事件类型
      caseUIEventSubtypeRemoteControlTogglePlayPause:// 暂停 ios6
        [_player musicPause];// 调用你所在项目的暂停按钮的响应方法 下面的也是如此
        break;
      caseUIEventSubtypeRemoteControlPreviousTrack:// 上一首
        [self lastMusic];
        break;
      caseUIEventSubtypeRemoteControlNextTrack:// 下一首
        [self nextMusic];
        break;
      caseUIEventSubtypeRemoteControlPlay://播放
        [_player musicPlay];
        break;
      caseUIEventSubtypeRemoteControlPause:// 暂停 ios7
        [_player musicPause];
        break;
      default:
        break;
    }
  }
}

- (void)configNowPlayingCenter {
  NSLog(@"锁屏设置");
//   BASE_INFO_FUN(@"配置NowPlayingCenter");
  YBVideoListModel * list = _model.audioList[_currentIndexPath.row];
  //以下代码是加载锁屏显示网络图片以及其他设置
  [[SDWebImageManager sharedManager] downloadImageWithURL:[NSURL URLWithString:list.thumbUrl] options:SDWebImageRetryFailed progress:nil completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
    if(image == nil) {
      image = [UIImage imageNamed:@"default_music"];
    }
    NSMutableDictionary * info = [NSMutableDictionary dictionary];
    //音乐的标题
    [info setObject:list.title forKey:MPMediaItemPropertyTitle];
    //音乐的艺术家
    NSString *author= list.singer;
    [info setObject:author forKey:MPMediaItemPropertyArtist];
    //音乐的播放时间
    [info setObject:@(_player.player.currentTime.value) forKey:MPNowPlayingInfoPropertyElapsedPlaybackTime];
    //音乐的播放速度
    [info setObject:@(1) forKey:MPNowPlayingInfoPropertyPlaybackRate];
    //音乐的总时间
    [info setObject:@(list.duration) forKey:MPMediaItemPropertyPlaybackDuration];
    //音乐的封面
    MPMediaItemArtwork * artwork = [[MPMediaItemArtwork alloc] initWithImage:image];
    [info setObject:artwork forKey:MPMediaItemPropertyArtwork];
    //完成设置
    [[MPNowPlayingInfoCenter defaultCenter]setNowPlayingInfo:info];
  }];
}