使用 swift 在屏幕上移动一个像素

Question

我对 VC 对象和其他对象（静态的，不一定是动态的）感兴趣，除此之外，我想要 pixel（一个或四个，取决于它是否可以被人眼看到）在屏幕的边界周围移动（所以在边界内）。

我附上我需要的照片：

所以我需要 "pixel" 无限移动做一个正方形，我还需要知道在我的代码中做某事的位置（在 swift 中）

Answer 1

您可以使用某种解决方案

Swift 2

UIView.animateKeyframesWithDuration(4, delay: 0.0, options: UIViewKeyframeAnimationOptions.Repeat, animations: { () -> Void in

    UIView.addKeyframeWithRelativeStartTime(0, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPointMake(0, 100)
    })
    UIView.addKeyframeWithRelativeStartTime(1/4, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPointMake(100, 100)
    })
    UIView.addKeyframeWithRelativeStartTime(2/4, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPointMake(100, 0)
    })

    UIView.addKeyframeWithRelativeStartTime(3/4, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPointMake(0, 0)
    })

}, completion: nil)

Swift 3,4,5

UIView.animateKeyframes(withDuration: 4, delay: 0.0, options: UIView.KeyframeAnimationOptions.repeat, animations: { () -> Void in

    UIView.addKeyframe(withRelativeStartTime: 0, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPoint(x: 0, y: 100)
    })
    UIView.addKeyframe(withRelativeStartTime: 1/4, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPoint(x: 100, y: 100)
    })
    UIView.addKeyframe(withRelativeStartTime: 2/4, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPoint(x: 100, y: 0)
    })

    UIView.addKeyframe(withRelativeStartTime: 3/4, relativeDuration: 1/4, animations: { () -> Void in
        self.aView.center = CGPoint(x: 0, y: 0)
    })

}, completion: nil)

CGPoint 值是您希望 UIView 对象移动的屏幕的 4 个角。

使用 swift 在屏幕上移动一个像素

Move a pixel through screen with swift

uiviewcontroller

uiview

swift