对随机坐标重复UIAnimation

Question

我正在尝试创建一个动画，在给定的延迟将一个圆在屏幕上移动到随机点。

然而，我的问题是，当我调用重复动画时。它将我的圆移回原点，并用完全相同的坐标重复那个精确的动画。有没有办法让我有一个重复的动画，每次都需要新的坐标？

startAnimations()：

func startAnimations() {

    UIView.beginAnimations(nil, context: nil)
    UIView.setAnimationDelay(gameSpeed)
    UIView.setAnimationRepeatCount(100)

    moveCircle()

    UIView.setAnimationDelegate(self)
    UIView.setAnimationDidStopSelector(#selector(killFloor))

    UIView.commitAnimations()
}

moveCircle()：

func moveCircle() {
    self.view.layoutIfNeeded()

    animator.removeAllBehaviors()

    let randomPoint = grabRandomPoint(from: self)
    print("Random Point (\(randomPoint.x), \(randomPoint.y))")
    circle.center = randomPoint
}

grabRandomPoint()：

func grabRandomPoint(from vc: ViewController) -> CGPoint {
    // x coordinate between MinX (left) and MaxX (right):
    let randomX = randomInRange(Int(CGRectGetMinX(vc.view.frame)), hi: Int(CGRectGetMaxX(vc.view.frame)))
    // y coordinate between MinY (top) and MaxY (bottom):
    let randomY = randomInRange(Int(CGRectGetMinY(vc.view.frame)), hi: Int(CGRectGetMaxY(vc.view.frame)))
    let randomPoint = CGPoint(x: randomX, y: randomY)

    return randomPoint
}

Answer 1

你好，我一直在研究你的问题，这是我发现的，检查这段代码，这段代码永远不会停止，但你可以定义一个变量的执行次数

    func startAnimations() {

        UIView.beginAnimations(nil, context: nil)
        UIView.setAnimationDelay(0.5)
        moveCircle()

        UIView.setAnimationDelegate(self)
        UIView.setAnimationDidStopSelector(#selector(self.startAnimations))
        UIView.commitAnimations()
    }

    func moveCircle() {
        self.view.layoutIfNeeded()

        //animator.removeAllBehaviors()

        let randomPoint = grabRandomPoint(from: self)
        print("Random Point (\(randomPoint.x), \(randomPoint.y))")
        objectToMove.center = randomPoint
    }

    func grabRandomPoint(from vc: ViewController) -> CGPoint {
        // x coordinate between MinX (left) and MaxX (right):
        let randomX = randomIntBewtween(Int(CGRectGetMinX(vc.view.frame)), max: Int(CGRectGetMaxX(vc.view.frame)))
        // y coordinate between MinY (top) and MidY (middle):
        let randomY = randomIntBewtween(Int(CGRectGetMinY(vc.view.frame)), max: Int(CGRectGetMidY(vc.view.frame)))
        let randomPoint = CGPoint(x: randomX, y: randomY)

        return randomPoint
    }

这是我的代码，用来在

func randomIntBewtween(min : Int, max : Int) ->Int
{
    let randomNumber = arc4random_uniform(UInt32(max) - UInt32(min)) + UInt32(min)
    return Int(randomNumber)
}

我希望这对你有帮助