获取键盘高度

(void)registerForKeyboardNotifications

{ //使用NSNotificationCenter 键盘出现时

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

//使用NSNotificationCenter 键盘隐藏时

[[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;

NSLog(@”键盘高度%d”,height);

[UIView animateWithDuration:0.5 animations:^{

CGRect subtab = subTable.frame;

subtab.size.height-=height;

subTable.frame = subtab;

} completion:^(BOOL finished) {

NSLog(@”执行动画完毕”);

}];

}

//当键退出时调用

(void)keyboardWillHide:(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;

NSLog(@”键盘高度%d”,height);

CGRect subtab = subTable.frame;

subtab.size.height+=height;

subTable.frame = subtab;

}