ios - 旋转 ImageView 动画

Question

我想永远旋转 ImageView 。我尝试了以下代码:

    UIView.animateWithDuration(3, animations: {
        self.loginLogo.transform = CGAffineTransformMakeRotation((360 * CGFloat(M_PI)) / 360)
        }){ (finished) -> Void in
            self.rotateImage()
    }

但这是一次性的。我的 ImageView 不会永远旋转。我该如何解决？

Answer 1

如果你想永远旋转你的图像，你可以这样做:

func rotateViewLayer() {
    let rotateView = CABasicAnimation()

    rotateView.fromValue = 0.degreesToRadian
    rotateView.toValue = 360.degreesToRadian
    rotateView.duration = 1
    rotateView.repeatCount = Float.infinity
    rotateView.removedOnCompletion = false
    rotateView.fillMode = kCAFillModeForwards
    rotateView.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
    imageView.layer.addAnimation(rotateView, forKey: "transform.rotation.z")
}

这是您的辅助扩展:

extension Int {
    var degreesToRadian : CGFloat {
        return CGFloat(self) * CGFloat(M_PI) / 180.0
    }
}

你可以引用THIS示例项目以获取更多信息。