在 UIViewRepresentable SwiftUI 中设置自定义 UIView 框架 [英] Set custom UIView frame in UIViewRepresentable SwiftUI

问题描述

我正在尝试使用 UIViewRepresentable 在 SwiftUI 中使用我的自定义 UIView，我希望我的 UIView 与我在 .frame() 中设置的大小相同，以便我可以像这样使用它:

I'm trying to use my custom UIView in SwiftUI using UIViewRepresentable and I want my UIView to have the same size as I set in .frame() so that I can use it like this:

MyViewRepresentable()
.frame(width: 400, height: 250, alignment: .center)

例如，我可以将框架设置为属性:

For example, I can set a frame as a property:

struct MyViewRepresentable: UIViewRepresentable {
    var frame: CGRect
    func makeUIView(context: Context) -> UIView {
        let myView = MyView(frame: frame)

        return view
    }
    func updateUIView(_ uiView: UIView, context: Context) {}
}

用法:

struct ContentView: View {
    var body: some View {
        MyViewRepresentable(frame: CGRect(x: 0, y: 0, width: 400, height: 250))
            .frame(width: 400, height: 250, alignment: .center)
    }
}

这不是一个解决方案，我想知道如何使它正确.

It is not a solution and I wonder how to make it right.

推荐答案

如果 MyView 具有正确的内部布局(仅取决于自己的边界)，则不需要外部附加限制，即

If MyView has correct internal layout (which depends only on own bounds), then there is not needs in external additional limitation, ie

struct MyViewRepresentable: UIViewRepresentable {
    func makeUIView(context: Context) -> UIView {
        return MyView(frame: .zero)
    }
    func updateUIView(_ uiView: UIView, context: Context) {}
}

将在 400x250 帧以下精确调整大小

will be exactly sized below having 400x250 frame

struct ContentView: View {
    var body: some View {
        MyViewRepresentable()
            .frame(width: 400, height: 250, alignment: .center)
    }
}

如果不是，则内部 MyView 布局有缺陷.

if it is not then internal MyView layout has defects.

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