导航嵌套组件时创建面包屑(角度2) [英] Create breadcrumb when navigating nested components (Angular 2)
本文介绍了导航嵌套组件时创建面包屑(角度2)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在为此苦苦挣扎:)
I am struggling with this :)
这个想法是要有一个组件,并且当导航槽子视图更新面包屑时,例如:
The idea is to have a component and when navigate trough sub-views update the breadcrumb for example:
<breadcrumb> Products / Category-C / My-Product </breadcrumb>
Products -> Category-A
-> Category-B
-> Category-C
|-> My-Product
推荐答案
可能不是最佳解决方案但是您可以使用RoutesRecognized路由器事件并遍历event.state._root儿童:
May be this is not the best solution but you can use RoutesRecognized router event and traverse through event.state._root childrens:
import {Injectable, EventEmitter} from '@angular/core';
import {Router, RoutesRecognized, ActivatedRouteSnapshot} from '@angular/router';
@Injectable()
export class BreadcrumbComponent {
public breadcrumbs:Array<any>;
constructor(private _router:Router) {
this._router.events.subscribe(eventData => {
if (eventData instanceof RoutesRecognized) {
let event:any = eventData;
let currentUrlPart = event.state._root;
let currUrl = '#'; //for HashLocationStrategy
this.breadcrumbs = [];
while (currentUrlPart.children.length > 0) {
currentUrlPart = currentUrlPart.children[0];
let routeSnaphot = <ActivatedRouteSnapshot>currentUrlPart.value;
currUrl += '/' + routeSnaphot.url.map(function (item) {
return item.path;
}).join('/');
this.breadcrumbs.push({
displayName: (<any>routeSnaphot.data).displayName,
url: currUrl,
params: routeSnaphot.params
})
console.log(this.breadcrumbs)
}
}
});
}}
路由配置如下所示:
export const AppRoutes:RouterConfig = [{
path: 'app',
component: App,
data: {
displayName: 'Home'
},
children: [
{
data: {
displayName: 'Pages'
},
path: 'pages',
component: Pages,
children: [
]
}
]}]
已使用Angular 2 RC4(@ angular / router 3.0.0-beta.1)进行了测试
Tested with Angular 2 RC4, @angular/router 3.0.0-beta.1
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