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？

Answer 1

要旋转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。

Answer 2

  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"]; 

Answer 3

使用CA3Daffinetransform旋转