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我正在尝试为transform视图的属性设置动画。这是我的代码：

CAKeyframeAnimation *shakeAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
NSArray *transformValues = [NSArray arrayWithObjects:
                        [NSValue valueWithCGAffineTransform:CGAffineTransformMakeRotation((3*M_PI)/8)],
                        [NSValue valueWithCGAffineTransform:CGAffineTransformMakeRotation(-((3*M_PI)/8))],
                        [NSValue valueWithCGAffineTransform:CGAffineTransformMakeRotation((3*M_PI)/8)],
                        [NSValue valueWithCGAffineTransform:CGAffineTransformMakeRotation(-((3*M_PI)/8))],
                        [NSValue valueWithCGAffineTransform:CGAffineTransformMakeRotation((3*M_PI)/8)],
                        [NSValue valueWithCGAffineTransform:CGAffineTransformMakeRotation(-((3*M_PI)/8))],
                        nil];

[shakeAnimation setValues:transformValues];

NSArray *times = [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.16f],[NSNumber numberWithFloat:0.33f],[NSNumber numberWithFloat:0.49f],[NSNumber numberWithFloat:0.66f],[NSNumber numberWithFloat:0.82f], [NSNumber numberWithFloat:1.0f], nil];

[shakeAnimation setKeyTimes:times];

NSArray *timingFunctions = [NSArray arrayWithObjects:
[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], 
[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], 
[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], 
[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], 
[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], 
nil];

[shakeAnimation setTimingFunctions:timingFunctions];

shakeAnimation.fillMode = kCAFillModeForwards;
shakeAnimation.removedOnCompletion = NO;
shakeAnimation.duration = 1.0f;

[self.someView.layer addAnimation:shakeAnimation forKey:@"anim"];

出于某种原因，每当我将方法的参数设置animationWithKeyPath:为“转换”时，都会出现错误。我已经尝试了半个小时来调试这个，但找不到错误。我最初虽然我在 UIView 的转换属性上执行不允许的动画，但我知道我可以做这样的事情：

aView.transform = CGAffineTransformMakeRotation(M_PI/2);

提前致谢。

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1 回答 1

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图层transform属性的值是 a CATransform3D，而不是 a CGAffineTransform。

transform.rotation.z此外，您可能会发现为关键路径设置动画更简单。该值只是 a CGFloat，因此您根本不必创建变换矩阵。

Core Animation Programming Guide中的“Modifying a Transform Using Key Paths” Core Animation Programming Guide 中的“ Key
Path Support for Structure Fields”

于 2012-06-20T03:06:05.153 回答