ios - 图像在 iOS 中的 3D ImageView 中旋转 360 度

Question

我正在开发一个应用程序，其中我希望 UIImage 应该在 UIImageview 中以 3 维旋转 360 度。我尝试了很多代码，但所有带有 CAAnimation 的代码都会顺时针旋转整个图像或翻转整个 ImageView 。那么，我该如何开发此类功能？

Answer 1

在Swift中，可以使用如下代码实现无限旋转: swift -

let kRotationAnimationKey = "com.myapplication.rotationanimationkey" // Any key

func rotateView(view: UIView, duration: Double = 1) {
    if view.layer.animationForKey(kRotationAnimationKey) == nil {
        let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation")

        rotationAnimation.fromValue = 0.0
        rotationAnimation.toValue = Float(M_PI * 2.0)
        rotationAnimation.duration = duration
        rotationAnimation.repeatCount = Float.infinity

        view.layer.addAnimation(rotationAnimation, forKey: kRotationAnimationKey)
    }
}

停止就像:

func stopRotatingView(view: UIView) {
    if view.layer.animationForKey(kRotationAnimationKey) != nil {
        view.layer.removeAnimationForKey(kRotationAnimationKey)
    }
}

objective-c

这对我来说非常有效:iphone UIImageView 旋转

#import <QuartzCore/QuartzCore.h>

    - (void) runSpinAnimationOnView:(UIView*)view duration:(CGFloat)duration rotations:(CGFloat)rotations repeat:(float)repeat;
    {
        CABasicAnimation* rotationAnimation;
        rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
        rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/ * rotations * duration ];
        rotationAnimation.duration = duration;
        rotationAnimation.cumulative = YES;
        rotationAnimation.repeatCount = repeat;

        [view.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
    }