硬件后退按钮被调用两次ionic5

import { Platform } from '@ionic/angular';

constructor(private platform: Platform) {
  this.platform.backButton.subscribeWithPriority(10, () => {
    // 处理后退逻辑
    console.log('Hardware back button pressed');
  });
}

import { CanDeactivate } from '@angular/router';
import { Injectable } from '@angular/core';

export interface CanComponentDeactivate {
  canDeactivate: () => Promise<boolean> | boolean;
}

@Injectable({
  providedIn: 'root'
})
export class CanDeactivateGuard implements CanDeactivate<CanComponentDeactivate> {
  canDeactivate(component: CanComponentDeactivate) {
    return component.canDeactivate ? component.canDeactivate() : true;
  }
}

const routes: Routes = [
  {
    path: 'your-path',
    component: YourComponent,
    canDeactivate: [CanDeactivateGuard]
  }
];

import { Router } from '@angular/router';

constructor(private router: Router) {
  this.router.events.subscribe(event => {
    if (event instanceof NavigationEnd) {
      // 清理历史记录的逻辑
    }
  });
}