动态获取iphone键盘的高度

监听键盘呼出事件的消息：

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1. [[NSNotificationCenter defaultCenter] addObserver:self   
2.                                          selector:@selector(keyboardWillShow:)   
3.                                              name:UIKeyboardWillShowNotification   
4.                                            object:nil];  

针对键盘高度做出自适应：

 

 

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1. - (void)keyboardWillShow:(NSNotification *)notification    
2. {    
3.     static CGFloat normalKeyboardHeight = 216.0f;  //iphone键盘  
4.     NSDictionary *info = [notification userInfo];    
5.     CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;       
6.     CGFloat distanceToMove = kbSize.height - normalKeyboardHeight;    
7.         
8.     //自适应代码    
9. }  

最后，移除观察者。

写了个小例子：

猛戳这里获取Demo

 

 

NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];

      //UIKeyboardWillShowNotifi cation键盘出现

      [defaultCenter addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotifi cation object:nil];

 

      //UIKeyboardWillHideNotifi cation 键盘隐藏

      [defaultCenter addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotifi cation object:nil];

 

- (void)keyboardWillShow:(NSNotification *)aNotification

{

      //获取键盘的高度

NSDictionary *userInfo = [aNotification userInfo];

      NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserIn foKey];

      CGRect keyboardRect = [aValue CGRectValue];

      int height = keyboardRect.size.width;

}