从其他组件访问激活的路线数据

Question

我们有组件（ka-cockpit-panel），它没有映射到任何路线，并手动插入到其他一些组件中，如下所示：

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

在这个组件中，我想访问当前活动的路线数据。

例如：如果我们有一些其他组件（比如 ka-integration-component ）并且它有一些与之关联的路由数据（如下所示），每当我们导航到这个组件时（通过url 或通过单击某些 routerlink ) ，我们想要访问 ka-cockpit-component 中的集成组件路由数据。

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

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

座舱组件代码：

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() { }
}

Answer 1

你必须使用Resolve Guard 来实现你想要实现的东西。

// 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() { }
}