Swift

Question

用户点击一个单元格，我获取 touchLocation，创建一个新的 UIWindow，然后将其动画化到屏幕中央。问题是当新 window（紫色）出现在屏幕上而不是它的中心位于屏幕中心时，它的 x,y 坐标从屏幕中心开始。

我明白了：

但我想要这个：

// the collectionView is dimmed black, that's why the background color is dark
guard let keyWindow = UIApplication.shared.keyWindow else { return }

let startingRect = CGRect(x: userTouchPointX, y: userTouchPointY, width: 10, height: 10)

let newWindow = UIWindow(frame: startingRect)
newWindow.backgroundColor = .clear
newWindow.windowLevel = UIWindow.Level.normal
newWindow.rootViewController = UINavigationController(rootViewController: PurpleVC())
newWindow.isHidden = false
newWindow.makeKey()

let endingCenterX = keyWindow.screen.bounds.midX // I also tried keyWindow.frame.width / 2 and also UIScreen.main.bounds.width / 2
let endingCenterY = keyWindow.screen.bounds.midY // I also tried keyWindow.frame.height / 2 and also UIScreen.main.bounds.height / 2
let endingWidth = keyWindow.frame.width
let endingHeight: CGFloat = 200

let endingCenter = CGPoint(x: endingCenterX, y: endingCenterY)

UIView.animate(withDuration: 0.4, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: [.curveEaseIn], animations: {

    newWindow.center = endingCenter
    newWindow.frame.size.width = endingWidth
    newWindow.frame.size.height = endingHeight
}) { (_) in

    newWindow.layoutIfNeeded()
}

Answer 1

改变你的中心设置框架后 window 将解决你的问题......希望它会帮助

// newWindow.center = endingCenter remove from here
    newWindow.frame.size.width = endingWidth
    newWindow.frame.size.height = endingHeight
    newWindow.center = endingCenter // add it here

Swift - 将新的 UIWIndow 置于屏幕中央

Swift -Position new UIWIndow in center of Screen

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cgrect

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cgpoint