我正在使用Angular2 Material Toolbar,我想将当前页面标题传递给它。Angular 2:如何从另一个组件访问ActivatedRoute快照数据
我app.component有一个头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app.routing我有一个自定义的title
属性路由对象:
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,但不幸的是它是未定义的。我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'];
}
}
如果我尝试用同样的方式来访问相同的属性,但是从HomeComponent
或SettingsComponent
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'];
}
}
所以,我怎么能访问route.snapshot.data['title']
从我的HeaderComponent
?
这是因为'header.component'不是*路由组件*。没有与之关联的路由,因此没有“数据”。你看过*路由器事件*(如[本博客文章](https://toddmotto.com/dynamic-page-titles-angular-2-router-events)中所述) – AngularChef