ios - UIButton 动画问题 - iOS

Question

我正在尝试处理 UIButton 动画，其中按钮移动到一个点，然后将隐藏设置为 true。然而，当我尝试使用以下代码时，该按钮甚至在动画完成之前就消失了。我做得正确吗？有什么建议吗？

[UIView animateWithDuration:0.8
                 animations:^{

                     selectedCurveIndex = 0;
                     [tradebutton moveTo:
                      CGPointMake(51,150) duration:0.8 
                                  option:curveValues[UIViewAnimationOptionCurveEaseInOut]];
                 }
                 completion:^(BOOL finished){ 

                     [tradeButton setHidden:TRUE];

                     UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil];
                     UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"ButtonView"];

                     self.modalPresentationStyle = UIModalPresentationCurrentContext;
                     [self presentModalViewController:vc animated:NO];

                 }];

Answer 1

在继续之前，您需要确保将完成设置为是。

您的按钮隐藏得很快，因为 0.8 是一个很快的动画持续时间。您需要找到另一个位置来隐藏该按钮，或者您可以

试试这个:

[UIView animateWithDuration:0.8
                 animations:^{

                     selectedCurveIndex = 0;
                     [tradebutton moveTo:
                      CGPointMake(51,150) duration:0.8 
                                  option:curveValues[UIViewAnimationOptionCurveEaseInOut]];
                 }
                 completion:^(BOOL finished){ 

                     if ( finished ) 
                     {    
                         [tradeButton performSelector:@selector(setHidden:) withObject:@"YES" afterDelay:3.0];

                         UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil];
                         UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"ButtonView"];

                         self.modalPresentationStyle = UIModalPresentationCurrentContext;
                         [self presentModalViewController:vc animated:NO];
                     }
                 }];