counter.txt

class CounterController: ObservableObject {
    static let shared = CounterController()
    var timer:Timer?
    @Published var numTimes = 0
    init() {
        timer = Timer.scheduledTimer(withTimeInterval: 3, repeats: true) { [weak self] timer in
            self?.numTimes += 1
        }
    }
}

struct CounterView: View {
    @ObservedObject var controller = CounterController.shared
    var body: some View {
        return Group {
            if controller.numTimes > 0 {
                LabelView(numTimes: controller.numTimes)
            }
            Button(action: {
                self.controller.numTimes += 1
            }) { Text("Tap me")}
        }
    }
}

struct LabelView: View {
    @State var numTimes = 0
    var body: some View {
        return Text("You've tapped \(numTimes) times")
    }
}