i want to do game on swift, first i need 3 textfield that user can enter 1 digit number charachter,
I wrote following code but its not working that i excpected, how can i do that?

import SwiftUI

struct RoundRectView : View {
    @State var text : String
    let limit = 1
    var body: some View {
        TextField("", text: $text,
                  onEditingChanged: { newValue in
            if text.count > 1 {
                text = String(text.prefix(1))
            }}
        
        )
            .padding()
            .kerning(-0.2)
            .bold()
            .frame(width: 68, height: 56)
            .keyboardType(.numberPad)
            .overlay(
                RoundedRectangle(cornerRadius: 21)
                    .stroke(lineWidth:2)
            )

    }}

struct Preview : PreviewProvider {
    static var enteredNumber = ""
    
    static var previews: some View {
        HStack{
            RoundRectView(text: enteredNumber)
            RoundRectView(text: enteredNumber)
            RoundRectView(text: enteredNumber)
        }
    }
}