在设置这个锁屏之前，首先得设置应用支持后台音乐播放，TAGETS->Info->Required background modes->App plays audio or streams audio/video using AirPlay
或者在plist中设置如上边数据。
1.添加self为第一响应者，并设置接收远程控制
[self becomeFirstResponder];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; -(BOOL)becomeFirstResponder{
return YES;
}
2.利用data初始化音乐播放器AVAudioPlayer，并设置prepareToPlay。
self.AudioPlayer = [[AVAudioPlayer alloc]initWithData:data error:&error];
[self.AudioPlayer prepareToPlay];
3.在播放/暂停的按钮控制中，设置音乐锁屏信息，一般每次播放和暂停的时候刷新锁屏信息
- (IBAction)clickbtn:(id)sender {
UIButton *btn = sender;
if (btn.tag == ) {
[self.AudioPlayer play];
}else{
[self.AudioPlayer pause];
}
btn.tag *= -;
if (self.AudioPlayer.isPlaying) {
NSLog(@"yes");
}else{
NSLog(@"no");
}
NSMutableDictionary *songInfo = [ [NSMutableDictionary alloc] init];
//锁屏图片
UIImage *img = [UIImage imageNamed:@"logo152"];
if (img) {
MPMediaItemArtwork *albumArt = [[MPMediaItemArtwork alloc]initWithImage:img];
[songInfo setObject: albumArt forKey:MPMediaItemPropertyArtwork ];
}
//锁屏标题
NSString *title = @"music";
[songInfo setObject:[NSNumber numberWithFloat:] forKey:MPMediaItemPropertyPlaybackDuration];
[songInfo setObject:title forKey:MPMediaItemPropertyTitle];
[songInfo setObject:title forKey:MPMediaItemPropertyAlbumTitle];
[[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:songInfo ];
}
4.添加接收远程控制的方法
- (void)remoteControlReceivedWithEvent:(UIEvent *)event
{
switch (event.subtype)
{
case UIEventSubtypeRemoteControlPlay:
NSLog(@"%s-%d",__FUNCTION__,__LINE__);
//play
[self.AudioPlayer play];
break;
case UIEventSubtypeRemoteControlPause:
// NSLog(@"%s-%d",__FUNCTION__,__LINE__);
//pause
[self.AudioPlayer pause];
break;
case UIEventSubtypeRemoteControlStop:
NSLog(@"%s-%d",__FUNCTION__,__LINE__);
//stop
break;
default:
break;
}
}