Swiftui 选择器在窗体中显示为禁用状态。。。缺陷？

考虑以下代码：

struct ContentView: View {

var colors = ["Red", "Green", "Blue", "Tartan"]
@State private var selectedColor = "Red"

var body: some View {
  Form {
    Section (header:Text("color")) {
      Picker("Please choose a color", selection: $selectedColor) {
        ForEach(colors, id: \.self) {
          Text($0)
        }
      }
    }
  }
}

}

运行它。结果是选择器被禁用。为什么？如何启用它

问题是选择器在表单中。第二节没有区别

---

您必须在导航视图中添加表单

struct ContentView: View {

var colors = ["Red", "Green", "Blue", "Tartan"]
@State private var selectedColor = "Red"

var body: some View {
    NavigationView {
        Form {
            Section (header:Text("color")) {
                Picker("Please choose a color", selection: $selectedColor) {
                    ForEach(colors, id: \.self) {
                        Text($0)
                    }
                }
            }
        }
        .navigationBarTitle("Color Picker")
    }
  }
}

---

您必须在导航视图中添加表单

struct ContentView: View {

var colors = ["Red", "Green", "Blue", "Tartan"]
@State private var selectedColor = "Red"

var body: some View {
    NavigationView {
        Form {
            Section (header:Text("color")) {
                Picker("Please choose a color", selection: $selectedColor) {
                    ForEach(colors, id: \.self) {
                        Text($0)
                    }
                }
            }
        }
        .navigationBarTitle("Color Picker")
    }
  }
}