SwiftUI - 存儲按鈕選擇的值

Question

我有一個HStack按鈕，用戶可以使用 select，其作用類似於單選按鈕。 我無法弄清楚如何存儲用戶的選擇。 我將MyRadioButtons()拉到另一個視圖中，我認為我的挑戰是如何訪問與每個按鈕關聯的id ，以便我可以存儲 ID。

我將此答案用作參考並稍作修改以滿足我的需要，但這或多或少是我的代碼

struct MyRadioButton: View {
    let id: Int
    @Binding var currentlySelectedId: Int
    var body: some View {
        Button(action: { self.currentlySelectedId = self.id }, label: { Text("Tap Me!") })
            .foregroundColor(id == currentlySelectedId ? .green : .red)
    }
}


struct MyRadioButtons: View {
    @State var currentlySelectedId: Int = 0
    var body: some View {
        VStack {
            MyRadioButton(id: 1, currentlySelectedId: $currentlySelectedId)
            MyRadioButton(id: 2, currentlySelectedId: $currentlySelectedId)
            MyRadioButton(id: 3, currentlySelectedId: $currentlySelectedId)
            MyRadioButton(id: 4, currentlySelectedId: $currentlySelectedId)
        }
    }
}

然后在用戶正在與之交互的視圖中，我將它與其他一些字段一起放在VStack中......

     MyRadioButtons()
     Button(action: {
     item.selection = [RadioButton ID Here]})

Answer 1

這應該這樣做：

struct MyRadioButton: View {
    let id: Int
    @Binding var currentlySelectedId: Int
    var body: some View {
        Button(action: { self.currentlySelectedId = self.id }, label: { Text("Tap Me!") })
            .foregroundColor(id == currentlySelectedId ? .green : .red)
    }
}


struct MyRadioButtons: View {
    init(selection: Binding<Int>) {
        self._currentlySelectedId = selection
    }
    @Binding var currentlySelectedId: Int
    var body: some View {
        VStack {
            MyRadioButton(id: 1, currentlySelectedId: $currentlySelectedId)
            MyRadioButton(id: 2, currentlySelectedId: $currentlySelectedId)
            MyRadioButton(id: 3, currentlySelectedId: $currentlySelectedId)
            MyRadioButton(id: 4, currentlySelectedId: $currentlySelectedId)
        }
    }
}

然后你可以像這樣使用它：

struct ContentView: View {
    @State var selection: Int = 0

    var body: some View {
        VStack {
            MyRadioButtons(selection: $selection)
            Button(action: {
                //whatever
            }) {
                Text("Click me!")
            }
        }
    }
}