如何将不在根层次结构中的SwiftUI视图呈现为UIImage？

import SwiftUI

struct CustomView: UIViewRepresentable {
    func makeUIView(context: Context) -> UIView {
        // 创建一个自定义的UIView
        let view = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
        view.backgroundColor = .red
        
        // 在UIView上添加子视图
        let label = UILabel(frame: CGRect(x: 50, y: 50, width: 100, height: 100))
        label.text = "Hello World"
        label.textColor = .white
        view.addSubview(label)
        
        return view
    }
    
    func updateUIView(_ uiView: UIView, context: Context) {
        // 更新UIView的内容
        // 这里可以根据需要进行一些操作，比如更新子视图的内容
    }
}

struct ContentView: View {
    var body: some View {
        VStack {
            // 使用自定义的UIView包装器
            CustomView()
                .frame(width: 200, height: 200)
            
            // 将UIView转换为UIImage
            Image(uiImage: UIImage(view: CustomView()))
                .resizable()
                .frame(width: 200, height: 200)
        }
    }
}

extension UIImage {
    convenience init(view: UIView) {
        UIGraphicsBeginImageContext(view.frame.size)
        view.layer.render(in: UIGraphicsGetCurrentContext()!)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        self.init(cgImage: (image?.cgImage)!)
    }
}