使用随机坐标重复 UIAnimation答案

【问题标题】：Repeat UIAnimation with Random Coordinates使用随机坐标重复 UIAnimation
【发布时间】：2016-09-01 15:28:57
【问题描述】：

我正在尝试创建一个动画，以给定的延迟将屏幕上的圆圈移动到随机点。

然而，我的问题是当我打电话重复动画时。它将我的圆圈移回原点，并以完全相同的坐标重复该精确动画。有没有办法让我制作一个每次都需要新坐标的重复动画？

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
}

【问题讨论】：

块。基于。动画片。自从。 IOS。 4.

标签： ios swift xcode animation uiview

【解决方案1】：

你好我一直在处理你的问题，这是我发现的，检查这段代码，这段代码永远不会停止，但你可以定义一个执行次数的变量

    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
    }

这是我在之间找到随机值的代码

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

希望对你有帮助

【讨论】：

删除所有行为是我的问题吗？