Question

我正在使用Angular4和Vmware的Angular Clarity UI构建应用程序。我有一个用于导航应用程序的主标题。应用程序中有一些视图，不需要侧边栏和其他视图。我希望在用户导航到某个视图时，显示特定视图的侧边栏。我也在我的应用程序中使用模块级路由。

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { MainComponent } from './main.component';

const routes: Routes = [
    {
        path: '', component: MainComponent,
        children: [
            {
                path: 'dashboard',
                loadChildren: './dashboard/dashboard.module#DashboardModule',
                data: {
                    title: 'Dashboard',
                    showSideNav: false
                }
            },
            {
                path: 'sales',
                loadChildren: './sales/sales.module#SalesModule',
                data: {
                    title: 'Sales',
                    showSideNav: true
                }
            }
        ]
    }
];

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

这是MainComponent

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

@Component({
    selector: 'app-main',
    templateUrl: './main.component.html',
    styleUrls: ['./main.component.scss']
})
export class MainComponent implements OnInit {

    showSideNav: Boolean = false;

    constructor(public router: Router, public activatedRoute: ActivatedRoute) { }

    setSidenavState() {
        this.router.events
            .filter(event => event instanceof NavigationEnd)
            .map(() => this.activatedRoute)
            .map(route => {
                while (route.firstChild) {
                    route = route.firstChild;
                }

                return route;
            })
            .filter(route => route.outlet === 'primary')
            .mergeMap(route => route.data)
            .subscribe((event) => { 
                this.showSideNav = event['showSideNav'];
                console.log(this.showSideNav);
            });
    }
    ngOnInit() {
        this.setSidenavState();
        if (this.router.url === '/') {
            this.router.navigate(['/dashboard']);
        }
    }

}

这是主模板

<clr-main-container>
    <header class="header header-6">
        <div class="branding">
            <a routerLink="/dashboard" class="brand nav-link">
                <img src="assets/img/logo-white.png">
            </a>
        </div>
        <div class="header-nav">
            <a routerLink="/dashboard" routerLinkActive="active" class="nav-link nav-text">Dashboard</a>
            <a routerLink="/sales" routerLinkActive="active" class="nav-link nav-text">Sales</a>
            <a href="" class="nav-link nav-text">Purchases</a>
            <a href="" class="nav-link nav-text">Contacts</a>
            <a href="" class="nav-link nav-text">Reports</a>
        </div>
    </header>
    <div class="content-container">
        <div class="content-area">
            <router-outlet></router-outlet>
        </div>
        <nav class="sidenav" *ngIf="showSideNav">
            <app-sidenav></app-sidenav>
        </nav>
    </div>
</clr-main-container>

在主要组件中，我设置了这样的

+-- dashboard
+-- sales
|   +-- sidenav
+-- sidenav
|   +-- sidenav.component.html
|   +-- sidenav.component.ts
+-- main-routing.module.ts
+-- main.component.html
+-- main.component.ts
+-- main.module.ts

我的问题是，如果app-sidenav属性设置为showSideNav，如何将特定视图的不同sidenav组件注入true组件。任何建议或链接将不胜感激。

Answer 1

我相信解决您的用例最简单的方法就是将布局的一小部分移动到实际的路由组件。现在，您在主模板中有这个：

<div class="content-container">
    <div class="content-area">
        <router-outlet></router-outlet>
    </div>
    <nav class="sidenav" *ngIf="showSideNav">
        <app-sidenav></app-sidenav>
    </nav>
</div>

让我们说你的销售模板如下：

<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>

通过将sidenav 向下移动到路由组件，您的主模板将变为：

<div class="content-container">
    <router-outlet></router-outlet>
</div>

，您的销售模板变为：

<div class="content-area">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<nav class="sidenav">
    <sales-sidenav></sales-sidenav>
</nav>

如果某个组件没有sidenav，则只需将sidenav放入其模板中即可。无需*ngIf。结果是你不再使用sidenav信息污染你的路线，你只需将它留给处理路线本身的组件，成为应该拥有特定sidenav逻辑的那个。

父项中的动态子组件

1 个答案: