iOS：为什么动画完成后对象会转到起始位置

))我正在尝试按如下方式设置UIButton的动画（两个并行动画：更改图像和移动），动画按钮应移动后，但动画完成后，按钮将转到开始位置。请帮我修一下！提前谢谢

- (IBAction)bugOneTapped:(id)sender
{
   [UIView animateWithDuration:1.0
                 animations:^{
                     self.bugOneButton.imageView.animationImages =
                     [NSArray arrayWithObjects:[UIImage imageNamed:@"bugOne3"],[UIImage imageNamed:@"bugOne2"],[UIImage imageNamed:@"bugOne1"],[UIImage imageNamed:@"bugOne2"],[UIImage imageNamed:@"bugOne3"],[UIImage imageNamed:@"bugOne4"],[UIImage imageNamed:@"bugOne5"],[UIImage imageNamed:@"bugOne4"],nil];
                     self.bugOneButton.imageView.animationDuration = 0.3;
                     [self.bugOneButton.imageView startAnimating];


                     self.bugOneButton.center = CGPointMake(self.bugOnePositionX, self.bugOneButton.center.y - 50);
                     self.bugOnePositionY = self.bugOnePositionY - 50;


                 }completion:^(BOOL finished) {
                     [self.bugOneButton.imageView stopAnimating];
                 }];

self.bugOneButton.center = CGPointMake(self.bugOnePositionX, self.bugOnePositionY);  
}

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删除代码中的以下行

self.bugOneButton.center = CGPointMake(self.bugOnePositionX, self.bugOnePositionY); 

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它将修复..

@Genie-Wanted说得对，删除代码

self.bugOneButton.center = CGPointMake(self.bugOnePositionX, self.bugOnePositionY)

这将重置按钮位置！

删除这两行

- (IBAction)bugOneTapped:(id)sender
{
   [UIView animateWithDuration:1.0
                 animations:^{
                     self.bugOneButton.imageView.animationImages =
                     [NSArray arrayWithObjects:[UIImage imageNamed:@"bugOne3"],[UIImage imageNamed:@"bugOne2"],[UIImage imageNamed:@"bugOne1"],[UIImage imageNamed:@"bugOne2"],[UIImage imageNamed:@"bugOne3"],[UIImage imageNamed:@"bugOne4"],[UIImage imageNamed:@"bugOne5"],[UIImage imageNamed:@"bugOne4"],nil];
                     self.bugOneButton.imageView.animationDuration = 0.3;
                     [self.bugOneButton.imageView startAnimating];

                     self.bugOneButton.center = CGPointMake(self.bugOnePositionX, self.bugOneButton.center.y - 50);

                 }completion:^(BOOL finished) {
                     [self.bugOneButton.imageView stopAnimating];
                 }];


}

---

您再次将中心设置为完成块后的初始位置。删除此self.bugOnePositionY=self.bugOnePositionY-50；谢谢，但我已经改变了上面的Y位置，为什么它没有改变？也许，当你使用动画块时，开始动画和停止动画在这里是不必要的。我认为他正在使用任何第三方库来制作动画@geniewante我认为你使用了第三方库，那么动画时间比你的动画时间长，因此，当它完成时，将重置它。或方法停止设置动画