Angular -在导航之前等待服务完成

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

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

  resolve() {
    return this.dataService.getData(); // 假设getData()是一个返回Promise的异步方法
  }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home.component';
import { DataResolver } from './data.resolver';

const routes: Routes = [
  {
    path: 'home',
    component: HomeComponent,
    resolve: {
      data: DataResolver // 使用resolve属性指定使用DataResolver解析器
    }
  }
];

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

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

@Component({
  selector: 'app-home',
  template: `
    <div>{{ data }}</div>
  `
})
export class HomeComponent {
  data: any;

  constructor(private route: ActivatedRoute) {
    this.data = this.route.snapshot.data['data']; // 通过ActivatedRoute获取解析后的数据
  }
}