Cocoa touch 如何暂停和恢复UIView动画（无块动画）？

如何暂停和恢复UIView动画？（不带块动画）

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我当时最难弄明白这一点，因此下面是我的资料来源，介绍如何做到这一点。

如何暂停和恢复UIView动画：

这将介绍如何在没有块动画的情况下执行上述操作。（人们仍然希望支持3.0及更高版本）

这仅允许在动画达到设定位置后暂停。对于如何在动画中间暂停动画，我建议使用这样的计算器：

CALayer* myLayer = [self.myUIView.layer presentationLayer];
CGRect frameStop = myLayer.frame;
double pausedX = frameStop.origin.x;
double pausedY = frameStop.origin.y;

现在，我们来了解一下如何：

startAnimation = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    startAnimation.titleLabel.font = [UIFont systemFontOfSize:22];
    startAnimation.titleLabel.lineBreakMode = UILineBreakModeHeadTruncation;
    [startAnimation setTitle:(@"pause") forState:UIControlStateNormal];
    [startAnimation addTarget:self action:@selector(doAnimation) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:startAnimation];



-(void)doAnimation{
    if (bicyclePad.animationPause == false){
       [restartAnimation setTitle:(@"Resume") forState:UIControlStateNormal];
       [bicyclePad pauseAnimation];
    } else {
       [restartAnimation setTitle:(@"Pause") forState:UIControlStateNormal];
       [bicyclePad resumeAnimation];
    }
}

-(void)resumeAnimation{
    bicyclePad.animationPause = false;
    [restartAnimation setTitle:(@"Resume") forState:UIControlStateNormal];
    objectMotion = [[yourUIView alloc]initWithFrame:CGRectMake((*yourPathPoints)[0].x, (*yourPathPoints)[0].y, 8, 8)];
    [self.view addSubview:objectMotion];
    [self animateBike:nil finished:YES context:nil];


}

-(void)pauseAnimation{
   bicyclePad.animationPause = true;

   [restartAnimation setTitle:(@"Pause") forState:UIControlStateNormal];
   [bicyclePad doAnimation];
}

-(void)animateObject:(NSString*)animationID finished:(BOOL)finished context:(void*)context {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationBeginsFromCurrentState:YES];
    //below suggesting your animation loops
    if (animationPause == true)
       [UIView setAnimationDidStopSelector:@selector(animateStop:finished:context:)];
    else
    [UIView setAnimationDidStopSelector:@selector(animateObject:finished:context:)];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationCurve: UIViewAnimationCurveLinear];
    [UIView setAnimationDuration:yourDelay];
    [UIView commitAnimations];
    animationPause == false;

}

-(void)animateStop:(NSString*)animationID finished:(BOOL)finished context:(void*)context{
}

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animationPause==false和
animationPause==true是比较，不做任何事情。您可能想分配值，但恐怕您没有。您将一个比较替换为另一个比较<代码>bicyclePad.animationPause==false仍然是一个比较，结果被丢弃。您需要
bicyclePad.animationPause=false。注意
==
与
=
的对比。好吧。我不明白你的第一句话。是的，这个密码大约有2年了。谢谢你指出这一点@黑暗的