我想检测 iPhone 上的耳机按钮点击，请参阅检测耳机按钮点击 iPhone SDK。我遵循http://developer.apple.com/library/IOS/#documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/RemoteControl/RemoteControl.html，然后我编写了如下代码，但它不能工作！！
- (BOOL)canBecomeFirstResponder
{
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent
{
if (receivedEvent.type == UIEventTypeRemoteControl) {
NSLog(@"Remote Control Event");
switch (receivedEvent.subtype) {
case UIEventSubtypeRemoteControlTogglePlayPause:
NSLog(@"UIEventSubtypeRemoteControlTogglePlayPause");
break;
default:
break;
}
}
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
- (void)viewWillDisappear:(BOOL)animated
{
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
[super viewWillDisappear:animated];
}
我的问题是我无法捕获远程控制事件。单击耳机上的播放或暂停按钮时，控制台不打印任何内容！谁能帮我？谢谢你。