怎样链，一个iPhone的UIImageView规模动画？ [英] How do I chain scale animations with an iPhone UIImageView?

问题描述

我想下来缩放图像，将图像，那么它的规模回来了。

I'm trying to scale an image down, change the image, then scale it back up.

CABasicAnimation* shrink = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
shrink.toValue = [NSNumber numberWithDouble:0];
shrink.duration = 1;
    shrink.delegate = self;
    [myImageView.layer addAnimation:shrink forKey:@"shrink"];

使得收缩，那么它完成时，我改变形象，并开始成长：

makes the shrink, then when it completes, I change the image, and start the grow:

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag 
{
    myImageView.image = [images objectAtIndex:image];
CABasicAnimation* grow = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
grow.toValue = CGAffineTransformMakeScale(1,1);
    grow.delegate = self;
grow.duration = 1;
[myImageView.layer addAnimation:grow forKey:@"grow"];	
}

这在模拟器上的伟大工程，但在设备上，收缩完成时，我得到了全尺寸的，旧图像的闪烁，然后养成动画开始与新的形象。

This works great on the simulator, but on the device, when the shrink completes, I get a flash of the full-size, old image, then the grow animation begins with the new image.

不知道如何摆脱闪光灯？

Any idea how to get rid of that flash?

（我试过removedOnCompletion = NO;，并试图设置的AffineTransform等于第一个完成后按比例缩小的尺寸，但没有多少运气）

(I've tried "removedOnCompletion = NO;" and attempted setting the affineTransform equal to the scaled down size after the first completion, but didn't have much luck.)

任何提示AP preciated。

Any tips appreciated.

KB

编辑：

好极了！设置如下：

shrink.fillMode = kCAFillModeForwards; 
shrink.removedOnCompletion = NO;

删除闪烁。谢谢，本！

Removed the flashing. Thanks, Ben!

推荐答案

尝试设置动画的在fillMode 到 kCAFillModeForwards 。这应该离开这个项目，因为它是在动画的结尾，而不是之前。

Try setting your animation's fillMode to kCAFillModeForwards. That should leave the item as it was at the end of the animation, rather than before.

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