如何在angular2路由器中更改页面标题

时间:2016-01-05 01:26:08

标签: typescript angular angular2-routing

我正在尝试从路由器更改页面标题,可以这样做吗?

import {RouteConfig} from 'angular2/router';
@RouteConfig([
  {path: '/home', component: HomeCmp, name: 'HomeCmp' }
])
class MyApp {}

13 个答案:

答案 0 :(得分:54)

Title service @EricMartinez points outsetTitle()方法 - 这就是设置标题所需的全部内容。

就在路线更改时自动执行此操作而言,截至目前除了订阅Router并调用{{1>之外,没有其他内置方法可以执行此操作在你的回调中:

setTitle()

那就是说,我强调截至目前因为路由器仍处于大量开发阶段,我希望(或者至少希望)我们能够通过{{ 1}}在最终版本中。

编辑:

自Angular 2(2.0.0)发布以来,发生了一些变化:

  • import {RouteConfig} from 'angular2/router'; import {Title} from 'angular2/platform/browser'; @RouteConfig([ {path: '/home', component: HomeCmp, name: 'HomeCmp' } ]) class MyApp { constructor(router:Router, title:Title) { router.events.subscribe((event)=>{ //fires on every URL change title.setTitle(getTitleFor(router.url)); }); } } 服务的文档现在位于https://angular.io/docs/ts/latest/api/platform-browser/index/Title-class.html
  • 该服务是从RouteConfig
  • 导入的

答案 1 :(得分:15)

这里的方法很好,特别是对于嵌套路线:

我使用递归辅助方法在路由更改后获取最深的可用标题:

@Component({
  selector: 'app',
  template: `
    <h1>{{title | async}}</h1>
    <router-outlet></router-outlet>
  `
})
export class AppComponent {
  constructor(private router: Router) {
    this.title = this.router.events
      .filter((event) => event instanceof NavigationEnd)
      .map(() => this.getDeepestTitle(this.router.routerState.snapshot.root));
  }

  title: Observable<string>;

  private getDeepestTitle(routeSnapshot: ActivatedRouteSnapshot) {
    var title = routeSnapshot.data ? routeSnapshot.data['title'] : '';
    if (routeSnapshot.firstChild) {
      title = this.getDeepestTitle(routeSnapshot.firstChild) || title;
    }
    return title;
  }
}

这是假设您已在路线的数据属性中分配了页面标题,如下所示:

{
  path: 'example',
  component: ExampleComponent,
  data: {
    title: 'Some Page'
  }
}

答案 2 :(得分:13)

对于Angular 4 +:

如果要使用路径自定义数据为每个路径路径定义页面标题,则以下方法适用于嵌套路径和角度版本4 +:

您可以在路线定义中传递页面标题:

  {path: 'home', component: DashboardComponent, data: {title: 'Home Pag'}},
  {path: 'about', component: AboutUsComponent, data: {title: 'About Us Page'}},
  {path: 'contact', component: ContactUsComponent, data: {title: 'Contact Us Pag'}},

现在,在您的上层组件中最重要的(即AppComponent),您可以在每次路线更改时全局捕获路线自定义数据并更新页面标题:

import {Title} from "@angular/platform-browser";
export class AppComponent implements OnInit {

    constructor(
        private activatedRoute: ActivatedRoute, 
        private router: Router, 
        private titleService: Title
    ) { }

    ngOnInit() {
         this.router
        .events
        .filter(event => event instanceof NavigationEnd)
        .map(() => {
          let child = this.activatedRoute.firstChild;
          while (child) {
            if (child.firstChild) {
              child = child.firstChild;
            } else if (child.snapshot.data && child.snapshot.data['title']) {
              return child.snapshot.data['title'];
            } else {
              return null;
            }
          }
          return null;
        }).subscribe( (title: any) => {
           this.titleService.setTitle(title);
       });
    }
 }

上述代码针对角度4 +进行测试。

答案 3 :(得分:9)

这样做非常容易,您可以按照以下步骤查看即时效果:

我们在bootstrap中提供Title服务:

import { NgModule } from '@angular/core';
import { BrowserModule, Title }  from '@angular/platform-browser';

import { AppComponent } from './app.component';

@NgModule({
  imports: [
    BrowserModule
  ],
  declarations: [
    AppComponent
  ],
  providers: [
    Title
  ],
  bootstrap: [ AppComponent ]
})
export class AppModule { }

然后在您想要的组件中导入此服务:

import { Component } from '@angular/core';
import { Title }     from '@angular/platform-browser';

@Component({
selector: 'my-app',
template:
  `<p>
    Select a title to set on the current HTML document:
  </p>

  <ul>
    <li><a (click)="setTitle( 'Good morning!' )">Good morning</a>.</li>
    <li><a (click)="setTitle( 'Good afternoon!' )">Good afternoon</a>.</li>
    <li><a (click)="setTitle( 'Good evening!' )">Good evening</a>.</li>
  </ul>
  `
})
export class AppComponent {
  public constructor(private titleService: Title ) { }

  public setTitle( newTitle: string) {
    this.titleService.setTitle( newTitle );
  }
}

现在点击这些链接以查看标题更改。

你也可以使用ng2-meta来改变页面标题和描述,你可以参考这个链接:

https://github.com/vinaygopinath/ng2-meta

答案 4 :(得分:5)

Angular 2提供Title Service看Shailesh答案只是该代码的副本。

我的app.module.ts

import { BrowserModule, Title } from '@angular/platform-browser';
........
providers: [..., Title],
bootstrap: [AppComponent]

现在转到我们的app.component.ts

import { Title }     from '@angular/platform-browser';
......
export class AppComponent {

    public constructor(private titleService: Title ) { }

    public setTitle( newTitle: string) {
      this.titleService.setTitle( newTitle );
    }
}

将标题标记放在组件html上,它将为您读取和设置。

如果您想知道如何动态设置它并further detail see this article

答案 5 :(得分:2)

这就是我的目的:

constructor(private router: Router, private title: Title) { }

ngOnInit() {
    this.router.events.subscribe(event => {
        if (event instanceof NavigationEnd) {
            this.title.setTitle(this.recursivelyGenerateTitle(this.router.routerState.snapshot.root).join(' - '));
        }
    });
}

recursivelyGenerateTitle(snapshot: ActivatedRouteSnapshot) {
    var titleParts = <string[]>[];
    if (snapshot) {
        if (snapshot.firstChild) {
            titleParts = titleParts.concat(this.recursivelyGenerateTitle(snapshot.firstChild));
        }

        if (snapshot.data['title']) {
            titleParts.push(snapshot.data['title']);
        }
    }

    return titleParts;
}

答案 6 :(得分:1)

import {Title} from "@angular/platform-browser"; 
@Component({
  selector: 'app',
  templateUrl: './app.component.html',
  providers : [Title]
})

export class AppComponent implements {
   constructor( private title: Title) { 
     this.title.setTitle('page title changed');
   }
}

答案 7 :(得分:1)

在下面的示例中:

- 我们添加了数据对象:{title:&#39; NAME&#39;任何路由对象。

- 我们设置一个基本名称(&#34; CTM&#34;)用于上传时间(点击F5进行Refreash ..):home{ .segment-button { color: red; //as suggested by @Mr_Perfect } }

- 我们添加了#34; TitleService&#34;类。

- 我们通过从app.component.ts过滤它们来处理Routher事件。

index.html:

<title>CTM</title>

...     

<强> app.module.ts:

<!DOCTYPE html>
<html>
  <head>
    <base href="/">
    <title>CTM</title>
  </head>

<强> title.service.ts:

import { NgModule, enableProdMode } from '@angular/core';
import { BrowserModule  } from '@angular/platform-browser';
import { TitleService }   from './shared/title.service';
...


@NgModule({
  imports: [
    BrowserModule,
..
  ],
  declarations: [
      AppComponent,
...
  ],
  providers: [
      TitleService,
...
  ],
  bootstrap: [AppComponent],
})
export class AppModule { }

enableProdMode();

应用-routing.module.ts:

import { Injectable } from '@angular/core';
import { Title }  from '@angular/platform-browser';
import { ActivatedRouteSnapshot } from '@angular/router';


@Injectable()
export class TitleService extends Title {

    constructor() {
        super();
    }


    private recursivelyGenerateTitle(snapshot: ActivatedRouteSnapshot) {
        var titleParts = <string[]>[];
        if (snapshot) {
            if (snapshot.firstChild) {
                titleParts = this.recursivelyGenerateTitle(snapshot.firstChild);
            }

            if (snapshot.data['title']) {
                titleParts.push(snapshot.data['title']);
            }
        }

        return titleParts;
    }

    public CTMGenerateTitle(snapshot: ActivatedRouteSnapshot) {
        this.setTitle("CTM | " + this.recursivelyGenerateTitle(snapshot).join(' - '));
    }

}

<强> app.component.ts:

import { Injectable } from '@angular/core';
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

import { MainComponent } from './components/main.component';

import { Router, CanActivate } from '@angular/router';
import { AuthGuard }          from './shared/auth/auth-guard.service';
import { AuthService }    from './shared/auth/auth.service';


export const routes: Routes = [
  { path: 'dashboard', component: MainComponent, canActivate: [AuthGuard], data: { title: 'Main' } },
];

@NgModule({
    imports: [
        RouterModule.forRoot(routes, { useHash: true })  // .../#/crisis-center/
    ],
    exports: [RouterModule],
    providers: [
..
    ]
})

export class AppRoutingModule { }

export const componentsOfAppRoutingModule = [MainComponent];

答案 8 :(得分:1)

Angular 6 + 我使用新的Pipe()修改了旧代码,并且工作正常。

import { Title } from '@angular/platform-browser';
import { filter, map, mergeMap } from 'rxjs/operators';

...

constructor(
    private router: Router,
    public activatedRoute: ActivatedRoute,
    public titleService: Title,
  ) {
    this.setTitle();
  }

...

setTitle() {
  this.router.events.pipe(
    filter((event) => event instanceof NavigationEnd),
    map(() => this.activatedRoute),
    map((route: any) => {
      while (route.firstChild) route = route.firstChild;
      return route;
    }),
    filter((route) => route.outlet === 'primary'),
    mergeMap((route: any) => route.data)).subscribe((event) => {
      this.titleService.setTitle(event['title']);
      console.log('Page Title', event['title']);
    })
  }

答案 9 :(得分:1)

使用管道和贴图方法而不是使用过滤器,可以在Angular 6和6+中正常工作

第1步:路由设置

{path: 'dashboard', component: DashboardComponent, data: {title: 'My Dashboard'}},
{path: 'aboutUs', component: AboutUsComponent, data: {title: 'About Us'}},
{path: 'contactUs', component: ContactUsComponent, data: {title: 'Contact Us Page'}},

第二步:在您的app.module.ts导入模块中

import { BrowserModule, Title } from '@angular/platform-browser';

然后在提供者中添加提供者:[title]

第3步     在您的主要组件导入中

import { Title } from "@angular/platform-browser";
import { RouterModule, ActivatedRoute, Router, NavigationEnd } from "@angular/router";
import { filter, map } from 'rxjs/operators';

constructor(private titleService: Title, private router: Router, private activatedRoute: ActivatedRoute) {

    }

ngOnInit() {

    this.router.events.pipe(map(() => {
        let child = this.activatedRoute.firstChild;
        while (child) {
            if (child.firstChild) {
                child = child.firstChild;
            } else if (child.snapshot.data && child.snapshot.data['title']) {
                return child.snapshot.data['title'];
            } else {
                return null;
            }
        }
        return null;
    })).subscribe(title => {
        this.titleService.setTitle(title);
    });

}

答案 10 :(得分:0)

如果您正在寻找一种动态设置页面标题和元标记的方法,我还可以推荐我刚刚发布的@ngx-meta/core插件插件。

答案 11 :(得分:0)

Angular 6 +

如果路由配置如下:-

Routes = [
     {  path: 'dashboard',
       component: DashboardComponent,
       data: {title: 'Dashboard'}
   }]

**然后可以在组件构造器标题中设置如下:-**

 constructor( private _titleService: Title, public activatedRoute: ActivatedRoute) {
    activatedRoute.data.pipe(map(data => data.title)).subscribe(x => this._titleService.setTitle(x));
   }

答案 12 :(得分:0)

设置标题的简单通用方法:

import { Component } from '@angular/core';
import { Title } from '@angular/platform-browser';
import { ActivatedRoute, Router, NavigationEnd } from '@angular/router';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {

  constructor(
    private activatedRoute: ActivatedRoute,
    private router: Router,
    private titleService: Title
    ) {}

  ngOnInit() {
    this.router.events.subscribe(event => {
      if (event instanceof NavigationEnd) {
        const { title } = this.activatedRoute.firstChild.snapshot.data;
        this.titleService.setTitle(title);
      }
    });
  }

}

需要在每个路由上设置title,例如:

{ path: '', component: WelcomeComponent, data: {title: 'Welcome to my app'} }