coordinator.swift

coordinator.swift

//
//  ContentView.swift
//  CoordinatorTest
//
//  Created by Miroslav Djukic on 18.5.24..
//

import SwiftUI

struct LabelView: UIViewRepresentable {
    @Binding var text: String

    class Coordinator: NSObject {
        var parent: LabelView

        init(parent: LabelView) {
            self.parent = parent
        }

        func updateLabelText(_ newText: String) {
            parent.text = newText
        }
    }


    func makeUIView(context: Context) -> UILabel {
        let label = UILabel()
        return label
    }

    func updateUIView(_ uiView: UILabel, context: Context) {
        uiView.text = text
    }

    func makeCoordinator() -> Coordinator {
        return Coordinator(parent: self)
    }
}

struct ContentView: View {
    @State private var text = "Hello, SwiftUI!"
    private var coordinator: LabelView.Coordinator? {
        let labelView = LabelView(text: $text)
        return labelView.makeCoordinator()
    }

    var body: some View {
        VStack {
            LabelView(text: $text)
                .onAppear {
                    if let coordinator = self.coordinator {
                        coordinator.updateLabelText("Updated text from SwiftUI")
                    }
                }

            Button("Update Text") {
                if let coordinator = self.coordinator {
                    coordinator.updateLabelText("Updated text \(Int.random(in: 0...1000))")
                }
            }
        }
    }
}


#Preview {
    ContentView()
}