表单中的SwiftUI - ForEach不会更新内容，即使它被正确存储

import SwiftUI

struct ContentView: View {
    @State private var items = ["Item 1", "Item 2"]
    
    var body: some View {
        VStack {
            ForEach(items.indices, id: \.self) { index in
                Text(items[index])
            }
            
            Button(action: {
                items.append("New Item")
            }) {
                Text("Add Item")
            }
        }
    }
}

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