Question

当键盘显示时，我的UIView没有向上移动，当键盘被隐藏时，UIView也消失了。

此编码位于ViewDidLoad

中

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

这个编码用于其余部分。

- (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

我认为这适合您的实施：

"message": "(#803) Some of the aliases you requested do not exist:

修改

我尝试了您的代码并致电-(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]; }完成了工作..

Answer 2

使用自动布局，您可以为约束常量设置动画，但不要更改CGRect帧。那是旧方式。

请看这个链接，我回答了一个类似的问题，他们遇到的问题是动画UIView的动作

Animate UIView with layoutConstraints

这应该有所帮助，但如果您需要澄清任何内容，请随时告诉我。

Answer 3

使用下面的代码，您不需要从任何地方调用

#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];
}

当键盘显示AutoLayout时，UIView没有向上移动

3 个答案: