iOS remoteControlReceivedWithEvent不叫

Question

在.plist中，我添加了正常的：http://tinyurl.com/c7e9joy 當iPhone被鎖定或我在應用程序之外並打開遠程按鈕時，我可以在那裏看到應用程序徽標和標題，但它們不要反應。 （我測試我自己的iPhone。）

// Makes sure we are able to connect to the media buttons on the lock screen. 
- (BOOL) canBecomeFirstResponder 
{ 
return YES; 
} 

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
// Do any additional setup after loading the view, typically from a nib. 

[[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; 
[self becomeFirstResponder]; 
} 

- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent { 
NSLog(@"REMOTE"); 
if (receivedEvent.type == UIEventTypeRemoteControl) { 

    switch (receivedEvent.subtype) { 

     case UIEventSubtypeRemoteControlTogglePlayPause: 
      [self playBtnPressed:nil]; 

      break; 

     case UIEventSubtypeRemoteControlPreviousTrack: 
      [self skipTrack:nil]; 
      break; 

     case UIEventSubtypeRemoteControlNextTrack: 
      [self skipTrack:nil]; 
      break; 

     default: 
      break; 
    } 
} 
} 

Answer 1

您註銷在viewWillDisapear這意味着任何時間都查看是不是你不會被註冊的事件在手機上看到的事件。我會改變註冊和取消註冊到viewDidLoad和viewDidUnload掛鉤的位置。

Answer 2

你可能還需要添加：

- (BOOL)canBecomeFirstResponder { 
    return YES; 
} 

的UIResponder需要任何的子類來實現這一點，否則將不接受第一個響應狀態。