Angular2 @angular/router 3.0.0-alpha.3 - 如何在路由更改时获取路由名称或路径 [英] Angular2 @angular/router 3.0.0-alpha.3 - How to get route name or path when route changes

问题描述

我正在尝试在路由更改时获取 app.component 中的当前路由名称或路由路径，以便我可以将路由名称用作围绕包装器 div 的页面类.我正在尝试找出处理此问题的最佳方法.以前，我订阅了如下所列的路由器更改属性，但@angular/router 3.0.0-alpha.3 似乎不再提供此属性.如果有人有任何想法或建议，我将不胜感激.

I'm trying to get the current route name or route path in my app.component when the route changes so that I can use the route name as a page class around a wrapper div. I'm trying to figure out the best way to handle this. Previously I was subscribing to the router changes property like I have listed below, but it seems like this is no longer available with @angular/router 3.0.0-alpha.3. If anyone has any thoughts or suggestions I would be most grateful.

this.router.changes.subscribe((val) => {
  var path = this._location.path();
  if (path.indexOf('page-name') !== -1) {
    this.pageClass = 'page-name';
  }
})

推荐答案

Steve 的答案是当前记录的答案，但是 ActivatedRoute 上的 url observable 没有为我触发，除非我第一次击中基地url(例如:从/index 到/index/item 有效，但从/index/item 到 index/item/2、index/dashboard，甚至/index 都不起作用).

Steve's answer is the one documented currently, but the url observable on ActivatedRoute is not firing for me except when I first hit the base url (ex: going from /index to /index/item works, but going from /index/item to index/item/2, index/dashboard, or even /index does not).

我不确定以下解决方案是否是最佳实践，也不确定对性能的影响是什么，但我能够在路由器的 NavigationEnd 事件上获得活动路由，如下所示:

I'm not sure if the following solution is a best practice nor what the performance implications are, but I was able to get the active route on the NavigationEnd event of the router with the following:

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

@Component({
    selector: 'navbar',
    directives: [ROUTER_DIRECTIVES], 
    template: `
                ...
              `    
})

export class NavBarComponent implements OnInit, OnDestroy {
    private sub: any;

    constructor(private router: Router) {
    }

    ngOnInit() {
        this.sub = this.router.events.subscribe(e => {
            if (e instanceof NavigationEnd) {
                console.log(e.url);
            } 
        });
    }


    ngOnDestroy() {
        this.sub.unsubscribe();
    }
}

每次更改路线时都会触发，无论您在 url 树中有多深或导航到/从哪里.

This fires every time you change the route, regardless of how deep you are in the url tree or where you navigate to/from.

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