ios - 如何在 UIViews 和 SKNodes 之间转换点

Question

我想转换 CGPoint在 UIView 之间和 SKNode ，类似于您如何通过各自的 View /图层在 View /图层之间进行转换 convert(_:to/from:)方法。

正确的做法是什么？

Answer 1

这是我想出的:

extension SKNode {

    /// Find point in node relative to it's containing SKView
    /// so that it can be further converted relative to other views.
    func pointInContainingView(_ point:CGPoint) -> (SKView, CGPoint)? {

        guard let scene = scene, let view = scene.view else {
            return nil
        }
        // Invert Y to match view coordinate system.
        let invertedY = CGPoint(x: point.x, y: -point.y)

        // Get the point in it's containing scene.
        let pointInScene = convert(invertedY, from: scene)

        // Get the resulting point in the containing SKView
        let pointInView = view.convert(pointInScene, from: scene)

        return (view, pointInView)
    }
}

这样使用:

// view/node

let origin = node.frame.origin

if let (nodeView, point) = node.parent?.pointInContainingView(origin) {
    let converted = nodeView.convert(point, from:view)
}