angular 7在路由上调用服务方法

// 1. 创建一个服务
// my-service.service.ts
import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class MyService {
  constructor() { }

  myMethod() {
    // 执行所需的操作
  }
}

// 2. 注册服务
// app.module.ts
import { NgModule } from '@angular/core';
import { MyService } from './my-service.service';

@NgModule({
  declarations: [/* ... */],
  imports: [/* ... */],
  providers: [MyService], // 注册服务
  bootstrap: [/* ... */]
})
export class AppModule { }

// 3. 导入和注入服务
// my-component.component.ts
import { Component } from '@angular/core';
import { MyService } from './my-service.service';

@Component({
  selector: 'app-my-component',
  template: `<!-- ... -->`,
  styleUrls: ['./my-component.component.css']
})
export class MyComponent {
  constructor(private myService: MyService) { } // 注入服务

  myMethod() {
    this.myService.myMethod(); // 调用服务方法
  }
}

// 4. 在路由中调用服务方法
// app-routing.module.ts
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { MyComponent } from './my-component.component';

const routes: Routes = [
  { path: 'my-route', component: MyComponent, canActivate: [AuthGuard] }
];

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