javascript - 从其他组件访问已激活路由的数据

我们有一个组件（ka-cockpit-panel），它没有映射到任何路由，而是手动插入到其他组件中，如下所示：

..
...
<section class="ka-cockpit-panel cockpit-1 pull-left">
            <ka-cockpit-panel></ka-cockpit-panel>
</section>
...
..

在此组件中，我想访问当前活动路由数据。

例如：如果我们有其他组件（比如 ka-integration-component）并且它有一些路由数据与之相关联（如下所示），每当我们导航到这个组件（通过 URL 或点击某个 routerlink）时，我们希望在我们的 ka-cockpit-component 中访问集成组件的路由数据。

 ..
    ... 
    {       
        path: "",       
        component: IntegrationComponent,
        data : {
            cockpit1 : false,
            cockpit2 : true,
            kpi : true
        },  
    }
    ..
    ...

基本上，我们想为应用中的某些组件配置我们的 ka-cockpit-component，这些组件映射到某些路由，以便我们可以隐藏/显示或更改其外观。

驾驶舱组件代码：

import { Component, OnInit } from '@angular/core';
import { Router,Event,NavigationEnd,ActivatedRoute } from '@angular/router';

@Component({
    selector: 'ka-cockpit-panel',
    templateUrl: './cockpit-panel.component.html',
    styleUrls : ['./cockpit-panel.component.scss']
})
export class CockpitPanelComponent implements OnInit {

    constructor(private router:Router,private activatedRoute : ActivatedRoute) {
         this.router.events.subscribe( (event:Event) => {
            if(event instanceof NavigationEnd) {
                console.log("Cockpit Panel Component : Route successfully changed -  ",event,this.router,this.activatedRoute);

                  // THIS IS WHAT WE WANT - get  Integration component route data here whenever i navigate to integration component!!!

            }
        });
     }

    ngOnInit() { }
}

答案＃1

你必须使用 Resolve Guard 来实现你想要的功能。

// MyDataResolver 服务

import { Injectable }             from '@angular/core';
import { Router, Resolve, RouterStateSnapshot,
         ActivatedRouteSnapshot } from '@angular/router';

@Injectable()
export class MyDataResolver implements Resolve<any> {
  constructor(private cs: CrisisService, private router: Router) {}
  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Promise<any> {

    let pathFromRoot = route.pathFromRoot;

    // you can compare pathFromRoot with your route to return different data

    return Promise.resolve({
        cockpit1 : false,
        cockpit2 : true,
        kpi : true
    });

  }
}

// 路由配置

.
.
{       
    path: "",       
    component: IntegrationComponent,
    resolve : {
        data: MyDataResolver
    },  
}
.
.

// 组件

export class CockpitPanelComponent implements OnInit {
  someBinding : string = "testing Value";

  constructor(private router:Router,private activatedRoute : ActivatedRoute) {

    this.activatedRoute.data.subscribe( (res) => {

      // here you will get your data from resolve guard.
      console.log(res);

    });
  }

  ngOnInit() { }
}