UIImageView动画完成后的访问方法 [英] Access Method After UIImageView Animation Finish

问题描述

我将一组图像加载到 UIImageView 中，我正在通过一个周期进行动画处理.显示图像后，我希望调用 @selector 以关闭当前视图控制器.使用以下代码对图像进行动画处理:

I have an array of images loaded into a UIImageView that I am animating through one cycle. After the images have been displayed, I would like a @selector to be called in order to dismiss the current view controller. The images are animated fine with this code:

NSArray * imageArray = [[NSArray alloc] initWithObjects:
                        [UIImage imageNamed:@"HowTo1.png"], 
                        [UIImage imageNamed:@"HowTo2.png"],
                        nil];
UIImageView * instructions = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

instructions.animationImages = imageArray;
[imageArray release];
instructions.animationDuration = 16.0;
instructions.animationRepeatCount = 1;
instructions.contentMode = UIViewContentModeBottomLeft;
[instructions startAnimating];
[self.view addSubview:instructions];
[instructions release];

16 秒后，我想要调用一个方法.我查看了 UIView 类方法 setAnimationDidStopSelector: 但我无法让它与我当前的动画实现一起工作.有什么建议吗?

After the 16 seconds, I would like a method to be called. I looked into the UIView class method setAnimationDidStopSelector: but I cannot get it to work with my current animation implementation. Any suggestions?

谢谢.

推荐答案

使用 performSelector:withObject:afterDelay::

[self performSelector:@selector(animationDidFinish:) withObject:nil
    afterDelay:instructions.animationDuration];

或使用dispatch_after:

dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, instructions.animationDuration * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
    [self animationDidFinish];
});

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