iOS获取键盘的高度(简洁有效)

iOS获取键盘的高度

(2013-03-06 17:45:31)

1. - (void)viewDidLoad

   {

   [super viewDidLoad];

   //增加监听，当键盘出现或改变时收出消息

   [[NSNotificationCenter defaultCenter] addObserver:self

   selector:@selector(keyboardWillShow:)

   name:UIKeyboardWillShowNotification

   object:nil];

   //增加监听，当键退出时收出消息

   [[NSNotificationCenter defaultCenter] addObserver:self

   selector:@selector(keyboardWillHide:)

   name:UIKeyboardWillHideNotification

   object:nil];

   }

   //当键盘出现或改变时调用

   - (void)keyboardWillShow:(NSNotification *)aNotification

   {

   //获取键盘的高度

   NSDictionary *userInfo = [aNotification userInfo];

   NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

   CGRect keyboardRect = [aValue CGRectValue];

   int height = keyboardRect.size.height;

   }

   //当键退出时调用

   - (void)keyboardWillHide:(NSNotification *)aNotification

   {

   }