Pause the timer with a button - ios

Question

I am making a timer but am unsure of how to pause it when the button is triggered.
I have attempted to make a boolean #State but I am yet unsure how to pause the timer when the button is triggered. Please review my code below...
struct TestView: View {
#State var isTimeStarted = false
#State var to: CGFloat = 0
#State var timeDuration = 60
#State var time = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
#State var isPaused = false
#State private var count = 0
var body: some View {
ZStack {
VStack {
ZStack {
Circle()
.trim(from: 0, to: self.to)
.stroke(LinearGradient(gradient: Gradient(colors: [Color.white, Color.white.opacity(0.2)]), startPoint: .topLeading, endPoint: .bottomTrailing), style: StrokeStyle(lineWidth: 15.6, lineCap: .round))
.shadow(radius: 8)
.rotationEffect(.degrees(90))
.rotation3DEffect(Angle(degrees: 180), axis: (x: 1, y: 0, z: 110))
.frame(width: 70, height: 70)
.animation(.easeOut)
.padding()
.padding(.leading, 10)
Text("\(self.timeDuration, specifier: formatTime())")
.font(.system(size: 17.5, design: .rounded))
.fontWeight(.semibold)
.foregroundColor(.white)
.padding(.leading, 10)
}
Button {
isPaused = true
} label: {
ZStack {
BlurView2(style: .systemThinMaterialDark)
.frame(width: 145, height: 45)
.background(Color.yellow)
.cornerRadius(30)
.padding(.horizontal)
Image(systemName: "pause")
.font(.title2)
.shadow(radius: 10)
.foregroundColor(.yellow)
}
}
}
}
.preferredColorScheme(.dark)
.onAppear {
self.timeDuration = 60
withAnimation(.default) {
self.to = 60
}
self.isTimeStarted = true
}
.onReceive(self.time, perform: { _ in
if self.timeDuration != 0 {
self.timeDuration -= 1
withAnimation(.default) {
self.to = CGFloat(self.timeDuration)/60
}
} else {
self.timeDuration = 60
self.to = 60
}
})
}
func formatTime() -> String {
let minutes = Int(timeDuration) / 60 % 60
let seconds = Int(timeDuration) % 60
return String(format: "%02i:%02i", minutes,seconds)
}
}
struct BlurView2: UIViewRepresentable {
var style: UIBlurEffect.Style
func makeUIView(context: Context) -> UIVisualEffectView {
let view = UIVisualEffectView(effect: UIBlurEffect(style: style))
return view
}
func updateUIView(_ uiView: UIVisualEffectView, context: Context) {
}
}

Answer 1

Thi should be pretty simple. Keep your timer firing but return in your function if it should pause.
Add this to the start of your .onReceive function:
if isPaused{
return
}
and change your Button to:
isPaused.toggle()