swiftui更改显示的 Select 器值

您好，我在swiftUI中创建了一个 Select 器，用户必须接受 Select 器上的更改.

它工作得很好，但有一个问题.如果用户 Select 某个内容，然后拒绝更改，则显示的值仍将是所选的值，尽管实际值没有更改.

如果我在没有 Select 任何内容的情况下再次打开选取器，它会恢复到正确的值，但如何在不打开选取器的情况下执行此操作？

struct ContentView: View {
@State private var selectedColorIndex = "cd"
@State private var temp = ""
@State var alert = false

private var colors = ["ab", "cd", "ef", "gh", "ij", "kl", "mn", "op", "qr", "st", "uv", "wx", "yz"]
var body: some View {
    
    
    HStack {
        Text("Location")
        Picker("Location", selection: Binding(get: {selectedColorIndex}, set: {
            temp = $0
            alert = true
        })) {
            ForEach(colors, id: \.self) {
                Text($0)
            }
        }.pickerStyle(MenuPickerStyle())
        
    }.alert(isPresented: $alert) {
        Alert(title: Text("are you sure"), primaryButton: .default(Text("yes"), action: {
            selectedColorIndex = temp
            
            
        }), secondaryButton: .default(Text("no"), action: {
            
            //change shown value back to prev selectedColorIndex
        }))
    }
    
}

}