iOS 鍵盤事件 - 使用NSNotificationCenter

iOS中有NSNotificationCenter可以接收Notify
其中鍵盤彈出事件是滿常用到的，例如要控制UIScrollView的範圍和大小

以鍵盤事件的範例如下：

可以在viewWillAppear中註冊Notification

     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
 

但記得要在viewWillDisappear中移除

     [[NSNotificationCenter defaultCenter] removeObserver:self];
 

如果鍵盤有彈出或是相關的事件，就會進入以下method：

 -(void)keyboardDidShow:(NSNotification*)notif{
     NSLog(@"keyboard show");
 }
 
 -(void)keyboardDidHide:(NSNotification *)notif{
     NSLog(@"keyboard hide");
 }
 

同步發表於 MyAndroid