iOS CAKeyFrameAnimation旋转

Question

我已经写了这个CAKEyFrameAnimaton在它的X轴上旋转一个CALayer。但它不旋转。我在这里做错了什么？

CAKeyframeAnimation *topFoldAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.x"]; 
topFoldAnimation.duration    = 15; 
topFoldAnimation.repeatCount   = 1; 
topFoldAnimation.removedOnCompletion = NO; 
topFoldAnimation.autoreverses   = NO; 
topFoldAnimation.fillMode    = kCAFillModeForwards; 

CATransform3D tTrans     = CATransform3DIdentity; 
tTrans.m34       = -1/900; 

topFoldAnimation.values    = [NSArray arrayWithObjects: 
             [NSValue valueWithCATransform3D:CATransform3DRotate(tTrans,DEGREES_TO_RADIANS(0),1,0,0)], 
             [NSValue valueWithCATransform3D:CATransform3DRotate(tTrans,DEGREES_TO_RADIANS(-30),1,0,0)], 
             [NSValue valueWithCATransform3D:CATransform3DRotate(tTrans,DEGREES_TO_RADIANS(-60),1,0,0)], 
             [NSValue valueWithCATransform3D:CATransform3DRotate(tTrans,DEGREES_TO_RADIANS(-90),1,0,0)], 
              nil]; 
topFoldAnimation.keyTimes    = [NSArray arrayWithObjects: 
              [NSNumber numberWithFloat:0.00], 
              [NSNumber numberWithFloat:0.25], 
              [NSNumber numberWithFloat:0.50], 
              [NSNumber numberWithFloat:1.00], 
              nil]; 
topFoldAnimation.timingFunctions  = [NSArray arrayWithObjects: 
             [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear], 
             [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear], 
             [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear], 
             [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear], 
              nil]; 
[[backgroundAnimationLayer.sublayers objectAtIndex:1] addAnimation:topFoldAnimation forKey:@"transform.rotation.x"]; 

任何帮助表示赞赏。谢谢...

Answer 1

你的动画keyPath是错的，它应该只是transform而不是transform.rotation.x。

此外，由于您使用的是整数除法，因此您将以0结尾为tTrans.m34。它应该可能是-1.0/900。