一.为监听键盘高度添加两个观察者
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillAppear:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillDisappear:) name:UIKeyboardWillHideNotification object:nil];
二.实现监听到通知调用的方法
-(void)keyboardWillAppear:(NSNotification *)notification
{
NSDictionary *info = [notification userInfo];
//取出动画时长
CGFloat animationDuration = [[info valueForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
//取出键盘位置大小信息
CGRect keyboardBounds = [info[UIKeyboardFrameEndUserInfoKey] CGRectValue];
//rect转换
CGRect keyboardRect = [self.view convertRect:keyboardBounds toView:nil];
//记录Y轴变化
CGFloat keyboardHeight = keyboardBounds.size.height;
//上移动画options
UIViewAnimationOptions options = (UIViewAnimationOptions)[[info valueForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue] << 16;
[UIView animateKeyframesWithDuration:animationDuration delay:0 options:options animations:^{
self.table.transform = CGAffineTransformMakeTranslation(0, -keyboardHeight + 64);
} completion:nil];
}
-(void)keyboardWillDisappear:(NSNotification *)notification
{
NSDictionary *info = [notification userInfo];
//取出动画时长
CGFloat animationDuration = [[info valueForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
//下移动画options
UIViewAnimationOptions options = (UIViewAnimationOptions)[[info valueForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue] << 16;
//回复动画
[UIView animateKeyframesWithDuration:animationDuration delay:0 options:options animations:^{
self.table.transform = CGAffineTransformIdentity;
} completion:nil];
}
