iOS键盘弹出消失监听

iOS 监听键盘的弹出，收起，并且拿到键盘的高度

//监听当键盘将要出现时

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(keyboardWillShow:)

name:UIKeyboardWillShowNotification

object:nil];

//监听当键将要退出时

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(keyboardWillHide:)

name:UIKeyboardWillHideNotification

object:nil];

//当键盘出现

- (void)keyboardWillShow:(NSNotification *)notification

{

//获取键盘的高度

NSDictionary *userInfo = [notification userInfo];

NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect = [value CGRectValue];

int height = keyboardRect.size.height;

}

//当键退出

- (void)keyboardWillHide:(NSNotification *)notification

{

//获取键盘的高度

NSDictionary *userInfo = [notification userInfo];

NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect = [value CGRectValue];

int height = keyboardRect.size.height;

}