在延迟加载的模块中定义一个特殊的组件，然后把CanDeactivate守卫放在这个组件的路由上。下面是代码示例：

1. 定义一个特殊的组件，比如叫做LazyComponent：

import { Component } from '@angular/core';

@Component({ selector: 'app-lazy', template: '' }) export class LazyComponent {}

2. 在延迟加载的模块中定义路由，把CanDeactivate守卫放在LazyComponent的路由上：

import { NgModule } from '@angular/core'; import { Routes, RouterModule } from '@angular/router'; import { LazyComponent } from './lazy.component';

const routes: Routes = [ { path: '', component: LazyComponent, canActivate: [], canDeactivate: [CanDeactivateGuard], children: [ { path: '', loadChildren: './lazy-child/lazy-child.module#LazyChildModule' } ] } ];

@NgModule({ imports: [RouterModule.forChild(routes)], exports: [RouterModule] }) export class LazyRoutingModule {}

3. 在CanDeactivate守卫中进行相应的操作：

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

@Injectable() export class CanDeactivateGuard implements CanDeactivate { canDeactivate(): Observable | Promise | boolean { // 进行相应的判断和操作 return true; } }