采用的是通知的常规方式
//解决键盘遮挡问题
//选择didShow是因为需要键盘的高度
//选择willHide是因为视图frame重置需要优先于键盘消失，否则表现得不连贯
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasShown:)
name:UIKeyboardDidShowNotificationobject:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasHide:)
name:UIKeyboardWillHideNotificationobject:nil];
触发的方法
-(void)keyboardWasShown:(NSNotification*)notification
{//获取键盘高度NSValue* value=notification.userInfo[UIKeyboardFrameBeginUserInfoKey];
CGFloat keyBoradHeight=[value CGRectValue].size.height;
NSNumber* animationTime=notification.userInfo[UIKeyboardAnimationDurationUserInfoKey];doubletime=[animationTime doubleValue];//获取被遮挡控件距离controller底部的距离floata=self.view4.frame.origin.y+self.view4.frame.size.height;floatb = self.view.frame.size.height-a;if(b<keyBoradHeight)
{//动画效果[UIView animateWithDuration:time
animations:^{//键盘被挡住了CGRect viewCGrect=self.view.frame;//视图应该上移所以是－viewCGrect.origin.y=viewCGrect.origin.y-(keyBoradHeight-b);
[self.view setFrame:viewCGrect];
} completion:nil];
}
}-(void)keyboardWasHide:(NSNotification*)notification
{
NSValue* value=notification.userInfo[UIKeyboardFrameBeginUserInfoKey];
CGFloat keyBoradHeight=[value CGRectValue].size.height;floata=self.view4.frame.origin.y+self.view4.frame.size.height;floatb = self.view.frame.size.height-a;
CGRect viewCGrect=self.view.frame;
viewCGrect.origin.y=viewCGrect.origin.y+(keyBoradHeight-b);
[self.view setFrame:viewCGrect];
}
最后移除通知
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotificationobject:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardDidShowNotificationobject:nil];
}
最终测试改方式只适用于输入控件比较少的界面，更多的可以使用gitHub上第三方
DaidoujiChen / DaiDodgeKeyboardhackiftekhar / IQKeyboardManager