如何使SwiftUI中的定时器在使用tabview切换标签时保持触发

import SwiftUI
import Combine

class TimerManager: ObservableObject {
    @Published var timer: Timer?
    
    init() {
        startTimer()
    }
    
    func startTimer() {
        timer = Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { _ in
            // 定时器触发的操作
            print("定时器触发")
        }
    }
    
    func stopTimer() {
        timer?.invalidate()
        timer = nil
    }
}

struct ContentView: View {
    @ObservedObject var timerManager = TimerManager()
    
    var body: some View {
        TabView {
            Text("标签1")
                .tabItem {
                    Image(systemName: "1.circle")
                    Text("标签1")
                }
            
            Text("标签2")
                .tabItem {
                    Image(systemName: "2.circle")
                    Text("标签2")
                }
        }
        .onAppear {
            self.timerManager.startTimer()
        }
        .onDisappear {
            self.timerManager.stopTimer()
        }
    }
}