我有一个名为“建议列表”的自定义组件,该组件从可观察的位置向用户显示建议列表。我已经尽可能通用地创建了此组件,因此您可以传递任何数据数组,因此我希望能够从父项自定义其显示,因为我永远无法确定对象的外观,直到实施它。不幸的是,我无法从ng-container中的父级访问子级组件变量。
使用ng-container或ng-template是否可能,或者我应该完全走另一条路线?
父组件
<suggestion-list (suggestionSelected)="selectSuggestion($event)" [$suggestions]="$suggestionSource">
<ng-container>
{{suggestion.firstname + ' ' + suggestion.lastname}}
<ng-container>
</suggestion-list>
子组件
<mat-list role="list">
<mat-list-item *ngFor="let suggestion of $suggestions | async">
<mat-icon mat-list-icon>person</mat-icon>
<mat-card (click)="selectSuggestion(suggestion)">
<ng-container></ng-container>
</mat-card>
</mat-list-item>
</mat-list>
答案 0 :(得分:1)
一种方法是使用ng-template
。您可以为父组件中的每个元素定义模板,并在子组件中为数组中的每个元素显示模板:
父组件:
<suggestion-list (suggestionSelected)="selectSuggestion($event)"
[suggestions]="$suggestionSource | async"
[suggestionTemplate]="suggestionTemplate">
</suggestion-list>
<ng-template #suggestionTemplate let-suggestion>
<span>{{suggestion.firstname + ' ' + suggestion.lastname}}</span>
</ng-template>
您就可以在子组件中进行操作(注意,我们通过ng-template
的隐式上下文在模板中传递了建议var:
<ng-container *ngFor="let suggestion of suggestions>
<ng-container *ngTemplateOutlet="suggestionTemplate; context: {$implicit: suggestion}"></ng-container>
</ng-container>
在子组件的.ts文件中,您声明传入的模板,如:
@Input() suggestionTemplate: TemplateRef<any>;
PS:我现在已经编写了这段代码,因此尚未经过测试,但是我认为您可以了解可以做什么!
答案 1 :(得分:0)
Here是有效的示例
parent.component.html
<div>
<suggestion-list (suggestionSelected)="selectSuggestion($event)" [$suggestions]="$suggestionSource">
<p>{{suggestion.firstname + ' ' + suggestion.lastname}}</p>
</suggestion-list>
</div>
child.component.html
<div>
<ng-content></ng-content>
<p>Hello !</p>
</div>