在iOS中旋轉對象

Question

如何讓對象（例如圖像）永久旋轉？

UIView.animateWithDuration(2.0, animations: ({ 

    self.Cube.transform = CGAffineTransformMakeRotation(320) 

})) 

有沒有人有解決方案，真的很感謝一些幫助。

Answer 1

試試這個函數來永久旋轉一個圖層。

func rotateLayer(layer:CALayer,duration:CFTimeInterval){ 
    let animation = CABasicAnimation(keyPath: "transform.rotation"); 
    animation.fromValue = 0; 
    animation.duration = duration; 
    animation.toValue = CGFloat(M_PI*2); 
    animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear); 
    animation.repeatCount = Float.infinity; 

    layer.addAnimation(animation, forKey: "rotation"); 
} 

使用量（持續時間是時間花費的層旋轉360個輩分）：

rotateLayer(subView.layer, duration: 2);