Please help me to Restart the timer by a bool value in my swift ui app

I would like to stop and start the timer by a boolean value, but thats not working. isEditMode variable binded to an other view's button. I would be very grateful if someone could help me.

There is the code:

import SwiftUI
import Combine

public struct ClockView: View {
    var width = UIScreen.main.bounds.width
    @State var currentTime = Time(sec: 0, min: 0, hour: 0.0)
    @State var timer = Timer.publish(every: 1, on: .current, in: .default).autoconnect()
    @State var connectedTimer: Cancellable? = nil
    

    @Binding var isEditMode: Bool
    
    public var body: some View {
        ZStack {
            //sec
            Rectangle()
                .fill(Color.red)
                .opacity(isEditMode ? 0 : 1)
                .frame(width: 1, height: (width - 175) / 2)
                .offset(y: -(width - 155) / 4)
                .rotationEffect(.degrees(Double(currentTime.sec * 6)))

            //min
            Rectangle()
                .fill(Color.secondary)
                .opacity(0.9)
                .frame(width: 2, height: (width - 200) / 2)
                .offset(y: -(width - 180) / 4)
                .rotationEffect(.degrees(Double(currentTime.min * 6)))
            
            //hour
            Rectangle()
                .fill(Color.primary)
                .frame(width: 3, height: (width - 220) / 2)
                .offset(y: -(width - 202) / 4)
                .rotationEffect(.degrees(Double(currentTime.hour * 30)))
            
        }.frame(width: width - 80, height: width - 80)
            
            //first call
            .onAppear(perform: {
                withAnimation(Animation.linear(duration: 0.01)) {
                    self.currentTime = getCurrentTime()
                }
            })
            
            //time changes
            .onReceive(timer) { i in
                withAnimation(Animation.linear(duration: 0.01)) {
                    if self.isEditMode {
                        self.timer.upstream.connect().cancel()
                    }
                    else if !self.isEditMode {
                        self.timer = Timer.publish(every: 1, on: .current, in: .default).autoconnect()
                    }
                    self.currentTime = getCurrentTime()
                }
            }
    }
}

func getCurrentTime() -> Time {
    let calendar = Calendar.current
    let sec = calendar.component(.second, from: Date())
    let min = calendar.component(.minute, from: Date())
    let hour: Double = Double(calendar.component(.hour, from: Date())) + Double(min) / 60
    return Time(sec: sec, min: min, hour: hour)
}


struct Time {
    var sec: Int
    var min: Int
    var hour: Double
}

struct ClockView_Previews: PreviewProvider {
    static var previews: some View {
        ClockView(isEditMode: .constant(false))
    }
}```