在SwiftUI中更新树结构的UI

import SwiftUI

struct ContentView: View {
    @State private var treeData: TreeData = TreeData()

    var body: some View {
        VStack {
            Text("Tree Structure")
                .font(.title)
                .padding()

            TreeView(data: treeData)
                .padding()

            Button("Update Tree") {
                // 更新树结构数据
                treeData.update()
            }
            .padding()
        }
    }
}

struct TreeView: View {
    let data: TreeData

    var body: some View {
        VStack {
            Text(data.name)
                .font(.headline)

            if !data.children.isEmpty {
                ForEach(data.children) { child in
                    TreeView(data: child)
                }
            }
        }
    }
}

struct TreeData {
    let name: String
    var children: [TreeData]

    init(name: String = "Root", children: [TreeData] = []) {
        self.name = name
        self.children = children
    }

    mutating func update() {
        // 更新树结构数据
        let newChild = TreeData(name: "New Child")
        children.append(newChild)
    }
}

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