Ios 滚动时，动画子视图移除冻结 我的代码：

我正在使用以下代码进行“添加到篮子”动画：

-(void)triggerAddItemAnimation:(NSIndexPath*)indexPath
{
    //Cell that was pressed.
    CellMenuItem *cell = [self.tableView cellForRowAtIndexPath:indexPath];

    // grab the imageview using cell
    UIImageView *imgV = (UIImageView*)[cell viewWithTag:IDENTIFIER_ANIMATION_IMAGE];

    //Get the x-coordinate of the image.
    int xCoord = cell.imgAddButton.frame.origin.x;

    // get the exact location of image
    CGRect rect = [imgV.superview convertRect:imgV.frame fromView:nil];
    rect = CGRectMake(xCoord, (rect.origin.y*-1)-10, imgV.frame.size.width, imgV.frame.size.height);

    //NSLog(@"rect is %f,%f,%f,%f",rect.origin.x,rect.origin.y,rect.size.width,rect.size.height);

    // create new duplicate image
    UIImageView *starView = [[UIImageView alloc] initWithImage:imgV.image];
    [starView setFrame:rect];
    starView.layer.cornerRadius=5;
    starView.layer.borderColor=[[UIColor blackColor]CGColor];
    starView.layer.borderWidth=1;
    [self.view addSubview:starView];

    // begin ---- apply position animation
    CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    pathAnimation.calculationMode = kCAAnimationPaced;
    pathAnimation.fillMode = kCAFillModeForwards;
    pathAnimation.removedOnCompletion = NO;
    pathAnimation.duration=0.65;
    pathAnimation.delegate=self;

    // tab-bar right side item frame-point = end point
    CGPoint endPoint = CGPointMake(self.lblBasketItemsCount.frame.origin.x, self.lblBasketItemsCount.frame.origin.y);

    CGMutablePathRef curvedPath = CGPathCreateMutable();
    CGPathMoveToPoint(curvedPath, NULL, starView.frame.origin.x, starView.frame.origin.y);
    CGPathAddCurveToPoint(curvedPath, NULL, endPoint.x, starView.frame.origin.y, endPoint.x, starView.frame.origin.y, endPoint.x, endPoint.y);
    pathAnimation.path = curvedPath;
    CGPathRelease(curvedPath);
    // end ---- apply position animation

    float animationDuration = 0.65f;

    // apply transform animation
    CABasicAnimation *basic=[CABasicAnimation animationWithKeyPath:@"transform"];
    [basic setToValue:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.25, 0.25, 0.25)]];
    [basic setAutoreverses:NO];
    [basic setDuration:animationDuration];

    [starView.layer addAnimation:pathAnimation forKey:@"curveAnimation"];
    [starView.layer addAnimation:basic forKey:@"transform"];

    //Remove the animation 0.05 before the animationDuration to remove clipping issue.
    [starView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:animationDuration - 0.05f];
}

问题是： 动画效果很好，但当我滚动用于动画的图像（从单元格中拍摄）时，直到滚动停止，图像才会从视图中移除

要删除的子视图将与方法中的最后一行代码一起删除：

 [starView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:animationDuration - 0.05f];

我所尝试的： 我试过使用GCD：

dispatch_async(dispatch_get_main_queue(), ^{
           //call method here....
        });

如果我记得的话，我相信我也尝试了一个带有计时器的运行循环，以及在主线程上执行选择器

我也试着把这个方法放在一个块中（不是我使用的实际代码，只是一个例子）：

问题是： 我可以推断滚动占用了主线程，因此我尝试异步调用该方法

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有人能告诉我我做错了什么吗？

要解决这个问题，您可以使用上面所示的块的完整部分。当时我只是不正确地使用了积木

然而，我解决这个问题的方法是，将动画的代理设置为self，因为我无法使路径动画在块中工作

并使用以下各项：

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag
{
    [theView removeFromSuperview];
}

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag
{
    [theView removeFromSuperview];
}