如何使用NavigationLink编辑列表中的项目？

struct ContentView: View {
    @State private var items = ["Item 1", "Item 2", "Item 3"]
    
    var body: some View {
        NavigationView {
            List {
                ForEach(items, id: \.self) { item in
                    NavigationLink(destination: EditView(item: item, onSave: { newItem in
                        // 更新列表中对应项目的数据
                        if let index = items.firstIndex(of: item) {
                            items[index] = newItem
                        }
                    })) {
                        Text(item)
                    }
                }
            }
            .navigationBarTitle("Items")
        }
    }
}

struct EditView: View {
    @State private var newItem: String
    
    var onSave: (String) -> Void
    
    init(item: String, onSave: @escaping (String) -> Void) {
        self._newItem = State(initialValue: item)
        self.onSave = onSave
    }
    
    var body: some View {
        TextField("Edit item", text: $newItem)
            .padding()
            .navigationBarTitle("Edit Item")
            .navigationBarItems(trailing: Button("Save") {
                onSave(newItem)
            })
    }
}