实现音乐的后台播放，，以及播放时，可以控制其暂停，下一首等操作，以及锁屏图片歌曲名等的显示 此实例需要真机调试，效果图如下：
工程下载：github工程下载
实现步骤： 1、首先修改info.plist
2、其次引入两个需要的框架
#import <AVFoundation/AVFoundation.h>#import <MediaPlayer/MediaPlayer.h>
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 {// <MediaPlayer/MediaPlayer.h>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];}
得意时应善待他人，因为你失意时会需要他们
