ipad触摸动画

发布于 2024-11-16 05:46:00 字数 781 浏览 3 评论 0原文

我在使用触摸来制作轮子动画时遇到问题。我花了一些时间为持续时间、旋转时间和动画持续时间输入不同的数字值，以便使用thoughsMove获得平滑的移动，但每次发生触摸时，轮子都会旋转，似乎发生的事情是它跳回到原来的位置。如果有人能对此有所了解，我将非常感激。

CABasicAnimation* rotationAnimation;
rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
rotationAnimation.fillMode = kCAFillModeForwards;
rotationAnimation.removedOnCompletion = NO;
rotationAnimation.delegate = self; 

rotationAnimation.toValue = [NSNumber numberWithFloat: 2  * 1 * 45 ];
rotationAnimation.duration = 2;
rotationAnimation.cumulative = YES;
rotationAnimation.repeatCount = 1; 


rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];


[animatedImage.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];

原文

Im having trouble animating a wheel using touch. Ive spent some time punching in different numbers values for duration, spin times and animation durations to get a smooth move using on thouchsMove, but every time a touch happens the wheel rotates and what seems to be happening is it jumps back to its original position. If any one can shed some light on this i would very much appreciate it.

CABasicAnimation* rotationAnimation;
rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
rotationAnimation.fillMode = kCAFillModeForwards;
rotationAnimation.removedOnCompletion = NO;
rotationAnimation.delegate = self; 

rotationAnimation.toValue = [NSNumber numberWithFloat: 2  * 1 * 45 ];
rotationAnimation.duration = 2;
rotationAnimation.cumulative = YES;
rotationAnimation.repeatCount = 1; 


rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];


[animatedImage.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];

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z祗昰~ 2024-11-23 05:46:00

对于那些感兴趣的人，下面的代码是获得所需效果所需要的

CGAffineTransform transforms = CGAffineTransformConcat(animatedImage.transform,CGAffineTransformMakeRotation(M_PI/2));
animatedImage.transform = transforms;

for those interested code below is whats needed to get the desired effect

CGAffineTransform transforms = CGAffineTransformConcat(animatedImage.transform,CGAffineTransformMakeRotation(M_PI/2));
animatedImage.transform = transforms;

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