如何在SwiftUI中组合形状？

import SwiftUI

struct ContentView: View {
    var body: some View {
        ZStack {
            // 矩形
            Rectangle()
                .fill(Color.red)
            
            // 圆形
            Circle()
                .fill(Color.blue)
            
            // 路径
            Path { path in
                path.move(to: CGPoint(x: 0, y: 0))
                path.addLine(to: CGPoint(x: 100, y: 100))
                path.addLine(to: CGPoint(x: 200, y: 0))
            }
            .fill(Color.green)
            
            // 文本
            Text("Hello SwiftUI")
                .font(.title)
                .foregroundColor(.white)
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}