如何将部分DragGesture用于我的侧边菜单

struct ContentView: View {
    @State private var menuOffset: CGFloat = 0
    
    var body: some View {
        VStack {
            Text("主要内容区域")
                .font(.title)
                .padding()
            
            Spacer()
        }
        .offset(x: menuOffset)
        .gesture(
            DragGesture()
                .onChanged { gesture in
                    if gesture.translation.width > 0 {
                        // 只允许向右拖动
                        menuOffset = gesture.translation.width
                    }
                }
                .onEnded { gesture in
                    if menuOffset > 100 {
                        // 打开菜单
                        menuOffset = 200
                    } else {
                        // 关闭菜单
                        menuOffset = 0
                    }
                }
        )
    }
}