如何在SwiftUI中为具有属性的VStack创建扩展？

import SwiftUI

// 扩展 VStack，添加默认的内边距和对齐方式
extension VStack where Content: View {
    init(alignment: HorizontalAlignment = .center, spacing: CGFloat = 10, @ViewBuilder content: () -> Content) {
        self.init(alignment: alignment, spacing: spacing, content: content)
        self.padding(.all, 20) // 添加默认的内边距
    }
}

// 使用扩展创建 VStack
struct ContentView: View {
    var body: some View {
        VStack(alignment: .leading, spacing: 15) {
            Text("标题")
                .font(.headline)
            Text("内容详情...")
                .font(.body)
        }
        .background(Color.white)
        .cornerRadius(10)
    }
}

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