当键盘显示时UIView不向上移动AutoLayout

Question

当键盘显示时，我的UIView没有向上移动，并且在隐藏键盘时也没有移动。

这种编码是在viewDidLoad中

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil]; 
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil]; 

这个编码是休息。

- (void)keyboardDidShow:(NSNotification *)note 
{ 
    [self animateTextField:TRUE]; 
} 

- (void)keyboardDidHide:(NSNotification *)note 
{ 
    [self animateTextField:FALSE]; 
} 

-(void)animateTextField :(BOOL)up 
{ 
    const int movementDistance = -130; // tweak as needed 
    const float movementDuration = 1.0; // tweak as needed 

    int movement = (up ? movementDistance : - movementDistance); 

    [UIView beginAnimations: @"animateTextField" context: nil]; 
    [UIView setAnimationBeginsFromCurrentState: YES]; 
    [UIView setAnimationDuration: movementDuration]; 
    _buttonsView.frame = CGRectOffset(_buttonsView.frame, 0, movement); 
    [UIView commitAnimations]; 
} 

Answer 1

使用自动布局，您可以为约束常量设置动画，尽管您不会更改CGRect框架。那是古老的方式。

请参阅此链接，我回答了类似的问题，他们有动画一个UIView

Animate UIView with layoutConstraints

这应该有助于运动的问题，尽管随时让我知道如果你需要任何澄清。

Answer 2

我觉得这适合您实现：

-(void)animateTextField :(BOOL)up 
{ 
    const int movementDistance = -130; // tweak as needed 
    const float movementDuration = 1.0; // tweak as needed 

    int movement = (moveUp ? movementDistance : - movementDistance); 

    [UIView beginAnimations: @"animateTextField" context: nil]; 
    [UIView setAnimationBeginsFromCurrentState: YES]; 
    [UIView setAnimationDuration: movementDuration]; 
    _buttonsView.frame = CGRectOffset(_buttonsView.frame, 0, movement); 
    [UIView commitAnimations]; 

    [_buttonsView setNeedsLayout]; 
} 

编辑

我想你的代码，并呼吁setNeedsLayout所做的工作..只是下面的代码

Answer 3

使用你不需要从任何地方拨打它

#pragma mark - move view up when keyboard is displayed 


- (void)textFieldDidBeginEditing:(UITextField *)textField 
{ 
    [self animateTextField: textField up: YES]; 
} 

- (void)textFieldDidEndEditing:(UITextField *)textField 
{ 
    [self animateTextField: textField up: NO]; 
} 

- (void) animateTextField: (UITextField*) textField up: (BOOL) up 
{ 
    const int movementDistance = 80; // tweak as needed 
    const float movementDuration = 0.3f; // tweak as needed 

    int movement = (up ? -movementDistance : movementDistance); 

    [UIView beginAnimations: @"anim" context: nil]; 
    [UIView setAnimationBeginsFromCurrentState: YES]; 
    [UIView setAnimationDuration: movementDuration]; 
    contentView.frame = CGRectOffset(contentView.frame, 0, movement); 
    [UIView commitAnimations]; 
}