Swiftui 文本更改后列表不更新

我肯定我做错了什么，但我不知道是什么

我有一个小列表，我用一个计时器更新文本，我可以在更新的调试器中看到它。但名单不会更新

谢谢你的帮助

struct ListTest: View {

    @State      var texts       : [String]

    var body: some View {
        List {
            ForEach(self.texts, id: \.self) { text in
                Text(text)
            }
        }
    }
}

struct ContentView: View {

    @State var texts = ["a"]

    var body: some View {

        ListTest(texts: self.texts)
            .onAppear() {
                Timer.scheduledTimer(withTimeInterval: 0.5, repeats: true) { (timer) in
                    self.texts.append("\(self.texts.count)")
                    print(self.texts)
                }
        }
    }
}

---

从ListTest中删除@State属性包装器

struct ListTest: View {
    var texts       : [String]
    var body: some View {
        List {
            ForEach(self.texts, id: \.self) { text in
                Text(text)
            }
        }
    }
}

最后，考虑更多的“组合兼容”代码

这在功能上是相等的

import SwiftUI
struct ListTest: View {
    var texts: [String]
    var body: some View {
        List {
            ForEach(self.texts, id: \.self) { text in
                Text(text)
            }
        }
    }
}

struct ContentView: View {
    @State var texts = ["a"]
    let tp = Timer.publish(every: 0.5, on: .main, in: .default).autoconnect()
    var body: some View {
        ListTest(texts: self.texts)
            .onReceive(tp) { (date) in
            self.texts.append("\(self.texts.count)")
        }
    }
}
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}