當鍵盤顯示時UIView不向上移動AutoLayout

Question

當鍵盤顯示時，我的UIView沒有向上移動，並且在隱藏鍵盤時也沒有移動。

這種編碼是在viewDidLoad中

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

這個編碼是休息。

- (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

使用自動佈局，您可以爲約束常量設置動畫，儘管您不會更改CGRect框架。那是古老的方式。

請參閱此鏈接，我回答了類似的問題，他們有動畫一個UIView

Animate UIView with layoutConstraints

這應該有助於運動的問題，儘管隨時讓我知道如果你需要任何澄清。

Answer 2

我覺得這適合您實現：

-(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]; 
} 

編輯

我想你的代碼，並呼籲setNeedsLayout所做的工作..只是下面的代碼

Answer 3

使用你不需要從任何地方撥打它

#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]; 
}