我可以在SwiftUI 中布局后获得`View` 的位置吗? [英] can I get the position of a `View` after layout in SwiftUI?

问题描述

有没有办法在布局后获得 View 的框架?我想在布局定位后绘制一条连接两个视图的线:

Is there a way to get a View's frame after layout? I'd like to draw a line connecting two views after layout has positioned them:

看来我需要类似 在 React 中测量.

It seems I need something like measure in React.

推荐答案

使用 GeometryReader 获取每个视图的框架，并使用框架确定两个视图之间路径的点.

Use a GeometryReader to get the frame of each view and use the frame to determine the points for a path between the two views.

struct ContentView : View {
    var body: some View {
        GeometryReader { geometry -> Text in
            let frame = geometry.frame(in: CoordinateSpace.local)
            return Text("\(frame.origin.x), \(frame.origin.y), \(frame.size.width), \(frame.size.height)")
        }
    }
}

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