iPhone多媒体遥控

 

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。

1.在View显示的时候接收remote-control事件

- (void)viewDidAppear:(BOOL)animated {

[super viewDidAppear:animated];

[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

[self becomeFirstResponder];

}

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 {

[[UIApplication sharedApplication] endReceivingRemoteControlEvents];

[self resignFirstResponder];

[super viewWillDisappear:animated];

}

                        

3 重新下面的函数

- (BOOL) canBecomeFirstResponder  {

return YES;

}

4 接收遥控事件

- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {

if (receivedEvent.type == UIEventTypeRemoteControl) {

switch (receivedEvent.subtype) {

case UIEventSubtypeRemoteControlTogglePlayPause:

[self playOrStop: nil];

break;

case UIEventSubtypeRemoteControlPreviousTrack:

[self previousTrack: nil];

break;

case UIEventSubtypeRemoteControlNextTrack:

[self nextTrack: nil];

break;

default:

break;

}

}

}