评论键盘弹出收起效果

先调用方法为键盘弹出收起添加监听事件

-(void)keyBoardConfig{

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardShow:) name:UIKeyboardWillShowNotification  object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardHide:) name:UIKeyboardWillHideNotification object:nil];

}

调用[self keyBoardConfig];

实现监听方法

#pragma mark-keyboard

//键盘收起

-(void)keyBoardHide:(NSNotification *)noti{

//这里获取键盘隐藏时间

CGFloat duration=[[noti.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];

[UIView animateWithDuration:duration animations:^{

//隐藏期间要对视图进行的操作

} completion:nil];

}

//键盘弹出

-(void)keyBoardShow:(NSNotification *)noti{

//获得键盘的高度

CGFloat height=[[noti.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;

CGFloat  duration=[[noti.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];

[UIView animateWithDuration:duration animations:^{

//键盘弹出期间要对视图进行的操作 

//下面是把视图据下的约束拖出来 改变值 以达到文本框跟随键盘上升的样子

//self.buttomConstraint.constant=height;

//[self.view layoutIfNeeded];

} completion:nil];

}

效果图