问题带旋转动画的CALayer

我掩盖了这样的图像：

UIView *maskImage; maskImage = [[UIView alloc] init];
maskImage.backgroundColor = UIColorFromRGB(FTRMaskColor);
maskImage.frame = newFrame;

CALayer *theLayer = [CALayer layer];
theLayer.contents = (id)[[UIImage imageNamed:@"image.png"] CGImage];
theLayer.frame = newFrame;

maskImage.layer.mask = theLayer;

它工作正常，但主要问题是如果我想旋转我的Ipad，视图或图层的旋转动画（我不是很确定）不起作用。它旋转没有动画。你能帮忙吗？

8112

2017-07-14 08:59

起源

简单地实现旋转动画 - 如何制作旋转动画 - beryllium

答案:

旋转一个 CALayer：

NSNumber *rotationAtStart = [myLayer valueForKeyPath:@"transform.rotation"];
CATransform3D myRotationTransform = CATransform3DRotate(myLayer.transform, myRotationAngle, 0.0, 0.0, 1.0);
myLayer.transform = myRotationTransform;        
CABasicAnimation *myAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
myAnimation.duration = kMyAnimationDuration;
myAnimation.fromValue = rotationAtStart;
myAnimation.toValue = [NSNumber numberWithFloat:([rotationAtStart floatValue] + myRotationAngle)];
[myLayer addAnimation:myAnimation forKey:@"transform.rotation"];

myRotationAngle 应该是弧度。逆时针旋转使用负值，顺时针使用正值。

2017-07-15 11:53

我可以向我的CALayer添加旋转动画，但主要问题是我的iPad旋转期间CALayer不会旋转 - Alex

实际上，这并没有回答这个问题，但它出现在搜索结果中并得到了解答我的问题，所以+1到“这个答案是有用的”:)） - Jerry Krinock

        CAKeyframeAnimation *rotation = [CAKeyframeAnimation animation];
        rotation.keyPath = @"transform.rotation";
        rotation.values = @[ @0.14, @0,@0.2 ,@0];
        rotation.timingFunctions = @[
                                     [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                     [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                     [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                     [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]
                                     ];
        rotation.fillMode            = kCAFillModeForwards;
        rotation.removedOnCompletion = NO;
        rotation.beginTime = AVCoreAnimationBeginTimeAtZero;
        [imageLayer addAnimation:rotation forKey:@"rotation"];

2018-04-14 05:28

使用CA3Daffinetransform旋转

-5

2017-07-15 10:31

问题 带旋转动画的CALayer

答案:

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问题带旋转动画的CALayer