在SwiftUI中使用MetalView？如何在其中放置要显示的内容？

import MetalKit

struct MetalView: UIViewRepresentable {
    func makeUIView(context: Context) -> MTKView {
        // 创建MTKView实例
        let metalView = MTKView()
        metalView.device = MTLCreateSystemDefaultDevice()
        metalView.clearColor = MTLClearColor(red: 0, green: 0, blue: 0, alpha: 1)
        return metalView
    }
    
    func updateUIView(_ uiView: MTKView, context: Context) {
        // 更新视图
    }
}

struct ContentView: View {
    var body: some View {
        MetalView()
    }
}