iOS如何实现音乐的后台播放

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实现步骤：

1、首先修改info.plist

2、其次引入两个需要的框架

#import #import

3、设置播放器及后台播放

- (void)viewDidLoad { [super viewDidLoad];// 设置后台播放 [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];// 设置播放器 NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"那些花儿" ofType:@"mp3"] ]; _player = [[AVPlayer alloc] initWithURL:url]; [_player play]; _isPlayingNow = YES; //后台播放显示信息设置 [self setPlayingInfo];}#pragma mark - 接收方法的设置- (void)remoteControlReceivedWithEvent:(UIEvent *)event { if (event.type == UIEventTypeRemoteControl) { //判断是否为远程控制 switch (event.subtype) { case UIEventSubtypeRemoteControlPlay: if (!_isPlayingNow) { [_player play]; } _isPlayingNow = !_isPlayingNow; break; case UIEventSubtypeRemoteControlPause: if (_isPlayingNow) { [_player pause]; } _isPlayingNow = !_isPlayingNow; break; case UIEventSubtypeRemoteControlNextTrack: NSLog(@"下一首"); break; case UIEventSubtypeRemoteControlPreviousTrack: NSLog(@"上一首 "); break; default: break; } }}

4、设置后台播放时显示的东西，例如歌曲名字，图片等

- (void)setPlayingInfo {// MPMediaItemArtwork *artWork = [[MPMediaItemArtwork alloc] initWithImage:[UIImage imageNamed:@"pushu.jpg"]]; NSDictionary *dic = @{MPMediaItemPropertyTitle:@"那些花儿", MPMediaItemPropertyArtist:@"朴树", MPMediaItemPropertyArtwork:artWork }; [[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:dic];}

5、远程控制设置

- (void)viewDidAppear:(BOOL)animated {// 接受远程控制 [self becomeFirstResponder]; [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];}- (void)viewDidDisappear:(BOOL)animated {// 取消远程控制 [self resignFirstResponder]; [[UIApplication sharedApplication] endReceivingRemoteControlEvents];}

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