BindingObservedObject.swift

//: A UIKit based Playground for presenting user interface

import SwiftUI
import UIKit
import Combine
import PlaygroundSupport

class Model: ObservableObject {
  @Published var on: Bool = false
}

class Thing: NSObject {
  @ObservedObject var model = Model()
}

var thing = Thing()

struct MyView<T: ObservableObject>: View {

  @Binding var value: Bool
  @ObservedObject var with: T
  

  var body: some View {
    Rectangle()
      .foregroundColor(value ? .blue : .red)
      .frame(width: 100.0, height: 100.0, alignment: .center)
      .onTapGesture {
        self.value.toggle()
        print(self.value)
    }
  }

}

// Present the view controller in the Live View window
PlaygroundPage.current.liveView = UIHostingController(rootView: MyView(value: thing.$model.on, with: thing.model))