原地址：http://geagle001.blog.163.com/blog/static/188226090201173110404762/
用户要实现后台的播放的控制，需要按下面的方法来实现。这样实现的效果就是和iPod后台播放的效果一样。在后台播放音乐的时候可以通过任务栏来控制。任务栏通过双击Home键来调出，调出后向左滑到最前门可以看到这个控制按钮。如下图：
1.在View显示的时候接收remote-control事件
- (void)viewDidAppear:(BOOL)animated {
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[super viewDidAppear:animated];
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[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
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[self becomeFirstResponder];
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}
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2.在View消失或者我们不需要响应控制的时候取消接收remote-control 事件
- (void)viewWillDisappear:(BOOL)animated {
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[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
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[self resignFirstResponder];
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[super viewWillDisappear:animated];
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}
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3 重新下面的函数
- (BOOL) canBecomeFirstResponder {
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return YES;
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}
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4 接收遥控事件
- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {
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if (receivedEvent.type == UIEventTypeRemoteControl) {
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switch (receivedEvent.subtype) {
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case UIEventSubtypeRemoteControlTogglePlayPause:
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[self playOrStop: nil];
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break;
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case UIEventSubtypeRemoteControlPreviousTrack:
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[self previousTrack: nil];
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break;
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case UIEventSubtypeRemoteControlNextTrack:
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[self nextTrack: nil];
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break;
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default:
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break;
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}
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}
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}
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