使用新路由器时,在浏览器中更改应用页面标题的正确方法是什么?
*使用Angular 2 CLI
答案 0 :(得分:49)
可以使用Title
service
要从当前路线获取标题,可以使用data
属性。
const routes: RouterConfig = [
{
path: '',
redirectTo: '/login',
pathMatch: 'full',
},
{
path: 'login',
component: LoginComponent,
data: {title: 'Login'}
},
{
path: 'home',
component: HomeComponent,
data: {title: 'Home'}
},
{
path: 'wepays',
component: WePaysComponent,
data: {title: 'WePays'}
}
];
export class AppComponent {
constructor(titleService:Title, router:Router, activatedRoute:ActivatedRoute) {
router.events.subscribe(event => {
if(event instanceof NavigationEnd) {
var title = this.getTitle(router.routerState, router.routerState.root).join('-');
console.log('title', title);
titleService.setTitle(title);
}
});
}
// collect that title data properties from all child routes
// there might be a better way but this worked for me
getTitle(state, parent) {
var data = [];
if(parent && parent.snapshot.data && parent.snapshot.data.title) {
data.push(parent.snapshot.data.title);
}
if(state && parent) {
data.push(... this.getTitle(state, state.firstChild(parent)));
}
return data;
}
}
刚刚找到https://github.com/angular/angular/issues/9662#issuecomment-229034288,其中展示了类似的方法。
我还发现https://toddmotto.com/dynamic-page-titles-angular-2-router-events有一个更漂亮的代码。
答案 1 :(得分:13)
以下代码(摘自:https://toddmotto.com/dynamic-page-titles-angular-2-router-events)就像魅力一样:
const routes: Routes = [{
path: 'calendar',
component: CalendarComponent,
children: [
{ path: '', redirectTo: 'new', pathMatch: 'full' },
{ path: 'all', component: CalendarListComponent, data: { title: 'My Calendar' } },
{ path: 'new', component: CalendarEventComponent, data: { title: 'New Calendar Entry' } },
{ path: ':id', component: CalendarEventComponent, data: { title: 'Calendar Entry' } }
]
}];
然后是AppComponent
import 'rxjs/add/operator/filter';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/mergeMap';
import { Component, OnInit } from '@angular/core';
import { Router, NavigationEnd, ActivatedRoute } from '@angular/router';
import { Title } from '@angular/platform-browser';
@Component({...})
export class AppComponent implements OnInit {
constructor(
private router: Router,
private activatedRoute: ActivatedRoute,
private titleService: Title
) {}
ngOnInit() {
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.titleService.setTitle(event['title']));
}
}
答案 2 :(得分:2)
您可以直接从组件的构造函数中使用title service设置标题: