CAKeyframeAnimation從頭到尾重複動畫

Question

我需要爲UIImageView從起點到終點添加無限動畫，然後從終點到起點添加無限動畫。 我想是這樣的：從起點

CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; 
pathAnimation.calculationMode = kCAAnimationPaced; 
pathAnimation.fillMode = kCAFillModeForwards; 
pathAnimation.removedOnCompletion = NO; 
pathAnimation.duration = 2.0; 
pathAnimation.repeatCount = HUGE_VALF; 
pathAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; 

CGPoint endPoint = CGPointMake(320.0f - 30.0f, self.myImage.frame.size.height); 
CGMutablePathRef curvedPath = CGPathCreateMutable(); 
CGPathMoveToPoint(curvedPath, NULL, self.myImage.frame.origin.x, self.myImage.frame.origin.y); 
CGPathAddCurveToPoint(curvedPath, NULL, endPoint.x, self.myImage.frame.origin.y, 
         endPoint.x, self.myImage.frame.origin.y, endPoint.x, endPoint.y); 
pathAnimation.path = curvedPath; 
CGPathRelease(curvedPath); 

[self.myImage.layer addAnimation:pathAnimation forKey:@"curveAnimation"]; 

MYIMAGE移動到結束好了，但在那之後移動到起點和從起點重複動畫結束。所以，從結束點開始沒有動畫。有可能嗎？

Answer 1

動畫回到相同的方式，你來是設置autoreverses爲簡單YES。

這就是說，如果它確實是一個無限的動畫，那麼你不需要fillMode或removedOnCompletion

Answer 2

我是你，我會簡單地使用：

[UIVIew animateWithDuration:delay:options:animations:completion:]

與選項

UIViewAnimationOptionRepeat