当键盘显示时，SCLAlertView不会移动

Question

我使用SCLAlertView并使用UITextView添加自定义视图，我的问题是在第一次显示键盘时SCLAlertView没有移动，请看这张图片

我编写此代码以在键盘显示时移动SCLAlertView

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShowFirstView:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHideFirstView:) name:UIKeyboardWillHideNotification object:nil];
}


- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}



- (void)keyboardWillShowFirstView:(NSNotification *)notification
{
    CGSize screenSize = [UIScreen mainScreen].bounds.size;
    CGRect dialogRect = addAlert.view.frame;
    CGFloat keyboardHeight = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;

    CGFloat top = (screenSize.height - keyboardHeight - dialogRect.size.height) / 2;
    NSLog(@"show........: %.0f", top);

    [UIView animateWithDuration:0.2 animations:^{
        CGRect frame = addAlert.view.frame;
        frame.origin.y = top;
        addAlert.view.frame = frame;
    }];



}

- (void)keyboardWillHideFirstView:(NSNotification *)notification
{
    CGSize screenSize = [UIScreen mainScreen].bounds.size;
    CGRect dialogRect = addAlert.view.frame;

    CGFloat top = (screenSize.height - dialogRect.size.height) / 2;
    NSLog(@"...hide.....: %.0f", top);

    [UIView animateWithDuration:0.2 animations:^{
        CGRect frame = addAlert.view.frame;
        frame.origin.y = top;
        addAlert.view.frame = frame;
    }];


}

现在当我隐藏＆amp;在模拟器中手动显示键盘＆＃34; Command + K＆＃34;它向右移动!!

有人可以帮忙解决这个问题！

Answer 1

尝试将AlertView的 centerY 约束挂钩为 IBOutlet ，并在键盘显示/隐藏时更改常量

像这样

 (void)keyboardWillShowFirstView:(NSNotification *)notification
 {
  CGSize screenSize = [UIScreen mainScreen].bounds.size;
  CGRect dialogRect = addAlert.view.frame;
  CGFloat keyboardHeight = [[[notification userInfo]  objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;

  CGFloat top =  -1 * (keyboardHeight / 2.0);

  self.alertViewCenterY.constant = top

  [UIView animateWithDuration:0.2 animations:^{

   [self.view layoutIfNeeded];

  }];



}

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

    self.alertViewCenterY.constant = 0

    [UIView animateWithDuration:0.2 animations:^{

     [self.view layoutIfNeeded];

   }];

 }

注意：如果需要，可以挂钩顶部或底部约束