Question

我有一个UIButton，当我点击按钮时，它会调用动画方法。但是当我再次点击时，动画会变得奇怪，它会快速移动。单击按钮时如何重建动画？感谢。

我试过[self.view.layer removeAllAnimations]，但没有工作。

这是我的按钮

- (void)viewDidLoad {
   ...
   [_go_button addTarget:self action:@selector(animation_go:) forControlEvents:UIControlEventTouchUpInside];
   ...
}

这是animation_go:方法

- (void)animation_go:(id)sender
{
   ...
   for (int start = 0; start < end; start++) {
      // that will create four uiview and add to self.view
   }
   _thread = [[NSThread alloc] initWithTarget:self selector:@selector(animation) object:nil];
   [_thread start];
}

这是animation方法

- (void)animation
{
    [UIView beginAnimations:@"Move randomly" context:nil];
    [UIView setAnimationDuration:0.06];

    CGPoint squarePostion1 = [self return_point:_first_view add_view:_add_first_view tag:1];
    _add_first_view.center = squarePostion1;

    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(animation)];
    [UIView commitAnimations];
}

Answer 1

改为使用CABasicAnimation：

CABasicAnimation* translationAnimation;
translationAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
translationAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(266, 266)];
translationAnimation.duration = 1;
translationAnimation.cumulative = YES;
translationAnimation.repeatCount = HUGE_VALF;
translationAnimation.removedOnCompletion = NO;
translationAnimation.fillMode = kCAFillModeForwards;
[self.label.layer addAnimation:translationAnimation forKey:@"positionAnimation"];

此代码为图层属性提供基本的单关键帧动画功能。您还可以根据Apple的技术说明QA1673实现暂停/开始图层动画功能。

Check out my github sample code.

UIView动画召回将迅速展开

1 个答案: