我创建了一个plunker来显示问题所在。
https://plnkr.co/edit/a7F616WCoKbSGXzlYGsM?p=preview
我有一个我想要在另一个组件中使用的组件,我导入它并将其添加到组件装饰器的指令:[]并且它不会渲染...
组件是line-list.component,它的选择器是gb-line-list,我试图在这个文件app / area-list.component.ts中使用它。
第一页显示了一个区域列表,当点击一个区域时,我想用一个列表显示该区域的详细信息。这就是那些没有渲染的行列表......
区域detail.component.ts
import {Component, Input, OnInit} from 'angular2/core';
import {RouteParams} from 'angular2/router';
import {LineListComponent} from './line-list.component';
import {Area} from './area.interface';
import {LineService} from './lines.service';
@Component({
selector: '[gb-area-detail]',
directives: [LineListComponent],
template: `
<div *ngIf="area">
<h2>{{area.name}} area</h2>
<gb-line-list [areaId]="area.id"></gb-line-list>
</div>
`
})
export class AreaDetailComponent implements OnInit {
private area: Area;
constructor(
private _lineService: LineService,
private _routeParams: RouteParams){}
ngOnInit() {
let id = +this._routeParams.get('id');
this._lineService.getArea(id)
.then(area => this.area = area);
}
}
线list.component.ts
import {Component, OnInit, Input} from 'angular2/core';
import {LineService} from './lines.service';
import {Line} from './line.interface';
@Component({
selector: '[gb-line-list]',
template: `
<ul>
<li *ngFor="#line of lines">{{line.name}}</li>
</ul>
`
})
export class LineListComponent implements OnInit {
@Input() areaId: number;
private lines: Line[];
constructor (
private _lineService: LineService) {}
getLines() {
this._lineService.getLines(this.areaId)
.then(lines => this.lines = lines);
}
ngOnInit() {
this.getLines();
}
}
答案 0 :(得分:2)
问题在于您将选择器定义为属性选择器selector: '[gb-line-list]'
,但是您尝试使用元素选择器<gb-line-list [areaId]="area.id"></gb-line-list>
来渲染组件。
您有两种选择:
- 将选择器更改为selector: 'gb-line-list'
- 或者将元素更改为<div gb-line-list [areaId]="area.id"></div>
最后,您可能会受益于Angular Cheat Sheet