我正在使用Angular2 Material Toolbar,我想将当前页面标题传递给它。
我的 app.component 有一个标题组件和当前页面组件:
@Component({
selector: 'mi-root',
template: `
<mi-header></mi-header>
<router-outlet></router-outlet>
`
})
export class AppComponent {
constructor() {}
}
在我的 app.routing 中,我有一个包含自定义title
属性的路由对象:
const APP_ROUTES: Routes = [
{
path: '',
component: HomeComponent,
data: {
title: 'Home'
}
}, {
path: 'settings',
component: SettingsComponent,
data: {
title: 'Settings'
}
}
];
现在我想从我的 header.component 访问data.title
属性,但遗憾的是它未定义。我的data
对象为空:
import { Component, OnInit } from '@angular/core';
import { ActivatedRoute} from '@angular/router';
@Component({
selector: 'mi-header',
template: `
<md-toolbar color="primary">
<span class="u-ml">{{title}}</span>
</md-toolbar>
`,
styles: []
})
export class HeaderComponent implements OnInit {
title: string;
constructor(private route: ActivatedRoute) {
this.title = this.route.snapshot.data['title'];
}
}
如果我尝试使用相同的方式访问相同的属性,但是从HomeComponent
或SettingsComponent
它可以正常工作:
import { Component } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
@Component({
selector: 'mi-settings',
template: `
<h1>Welcome to {{title}} screen</h1>
`,
styles: []
})
export class SettingsComponent {
title: string;
constructor(private route: ActivatedRoute) {
this.title = route.snapshot.data['title'];
}
}
那么,如何从我的route.snapshot.data['title']
访问HeaderComponent
?
答案 0 :(得分:6)
constructor(router:Router, route:ActivatedRoute) {
router.events
.filter(e => e instanceof NavigationEnd)
.forEach(e => {
console.log('title', route.root.firstChild.snapshot.data.title);
}
}