Show random TextField as a text-CodePudding

I want to make button, which pressed will show us random textfield (from 3 textfields: username, username2 or username3). Currently I have something like this, but don't know how to make it possible.

struct Test: View {

/// @State private var names : ??? - I don't know what should be there
    @State private var username: String = ""
    @State var username2: String = ""
    @State var username3: String = ""
    var body: some View {
        
        
        NavigationView {
            VStack {
                TextField("Your name", text: $username)
                TextField("Your name2", text: $username2)
                TextField("Your name3", text: $username3)
                
                Button(action: randomName) {
                    Text("draw")
                            
                        }
                    
             }
                
                Text("names.text") /// it doesn't work
                .foregroundColor(.black)
                .font(.largeTitle)
                
            }
        }
    }
    
    
    private func randomName() {
        let names = ["\(username)", "\(username2)", "\(username3)"]
    }
}

I have tried to add everything into first @State private var names, but nothing work properly. Maybe I am just trying in wrong way? Or it shouldn't be done by 'let names'? I don't know and have no idea.

CodePudding user response：

first of all you just need to add randomName as State.

struct Example: View {

    @State private var username: String = ""
    @State var username2: String = ""
    @State var username3: String = ""
    @State var selectedName: String = "Initial Value"
    
    var body: some View {
        NavigationView {
            VStack {
                TextField("Your name", text: $username)
                TextField("Your name2", text: $username2)
                TextField("Your name3", text: $username3)
                
                Button(action: randomName) {
                    Text("draw")
                }
                
                Text(selectedName) 
                    .foregroundColor(.black)
                    .font(.largeTitle)
            }
                    
          }
        }
        
        private func randomName() {
            let names = ["\(username)", "\(username2)", "\(username3)"]
            
            selectedName = names[Int.random(in: 0..<names.count)]
        }
}