如何暂停和恢复 UIView 动画(没有块动画)? [英] How to pause and resume UIView Animation (without Block Animation)?

问题描述

如何暂停和恢复 UIView 动画?(无块动画)

How do you pause and resume UIView Animations? (without block animations)

我最难解决这个问题，所以下面是我的资料来源.

I was having the hardest time figuring this out, so here is my source below on how to do it.

推荐答案

如何暂停和恢复 UIView 动画:

How to pause and resume UIView Animations:

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).

This will cover how to do the above without block animations. (People do still wish to support 3.0 and up).

这仅允许在动画到达设定位置后暂停.关于如何在动画中间暂停动画，我建议使用 CALayer:

This only allows for pausing once the animation has met the set location. For how to pause an animation in the middle of an animation, i suggest using CALayers as such:

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

现在是实际操作方法:

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{
}

这篇关于如何暂停和恢复 UIView 动画(没有块动画)?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！