- (void)viewDidLoad {

    [super viewDidLoad];

 

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

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

}

 

 

//隐藏键盘

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    [self.view endEditing:YES];

}

- (void)keyboardWillShow:(NSNotification *)notification {

    

    //改变window的背景颜色

    self.view.window.backgroundColor = self.view.backgroundColor;

    

    //  键盘退出的frame

    CGRect frame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

    

    //键盘实时y

    CGFloat keyY = frame.origin.y;

    

    if (_nextBtny <= keyY-LTloginInset ) {

        

        return;

    }

    

    CGFloat screenh = keyY-_nextBtny-LTloginInset;

    

    //动画时间

    CGFloat keyDuration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue];

    

        //执行动画

    [UIView animateWithDuration:keyDuration animations:^{

        self.view.transform = CGAffineTransformMakeTranslation(0,screenh );

    }];

}

- (void)keyboardWillHide:(NSNotification *)notification {

    

    //动画时间

    CGFloat keyDuration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue];

    

    //执行动画

    [UIView animateWithDuration:keyDuration animations:^{

        self.view.transform = CGAffineTransformMakeTranslation(0,0);

    }];

}

- (void)dealloc

{

    

    [[NSNotificationCenter defaultCenter] removeObserver:self name:nil object:nil];

    

}