在Angular2中，如何使用resolve和promise在app路由渲染页面之前等待从服务器加载数据

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import import { MyComponent } from './my.component';
import { MyResolver } from './my.resolver';

const routes: Routes = [
  {
    path: 'my',
    component: MyComponent,
    resolve: {
      data: MyResolver
    }
  }
];

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

import { Injectable } from '@angular/core';
import { Resolve } from '@angular/router';
import { Observable } from 'rxjs';
import { DataService } from './data.service';

@Injectable()
export class MyResolver implements Resolve<any> {
  constructor(private dataService: DataService) {}

  resolve(): Observable<any> {
    return this.dataService.loadData();
  }
}

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

@Component({
  selector: 'app-my',
  template: `
    <h1>{{ data.title }}</h1>
    <p>{{ data.description }}</p>
  `
})
export class MyComponent {
  data: any;

  constructor(private route: ActivatedRoute) {
    this.data = this.route.snapshot.data.data;
  }
}