我试图在Angular中显示一个简单的项目列表,并在侧面显示可点击的div;根据用户选择,该组件应在被点击的组件下方动态创建一个新组件。
为此,我正在使用ComponentFactoryResolver
,没有任何相关问题;但是,使用ViewContainerRef
作为父对象,即使我在createComponent()
方法中将其指定为参数,也找不到如何将创建的组件放置在指定的索引处。
app.component.html
<h3>Click on the arrow to create a component below the item clicked.</h3>
<div #myContainer>
<div *ngFor="let thing of things; let index = index">
<div class="inline click" (click)="thingSelected(thing, index)"> > </div>
<div class="inline">{{thing.id}}</div>
<div class="inline">{{thing.name}}</div>
<div class="inline">{{thing.value}}</div>
</div>
</div>
app.component.ts
export class AppComponent {
@ViewChild('myContainer', { read: ViewContainerRef }) container: ViewContainerRef;
things = [];
constructor(private componentFactoryResolver: ComponentFactoryResolver){
for(let i=0; i < 10; i++)
this.things.push({id: i, name: "thing" + i, value: 5 * i});
}
thingSelected(thing: any, index: number){
let component = this.container.createComponent(this.componentFactoryResolver.resolveComponentFactory(DetailComponent), index);
component.instance.id = thing.id;
}
}
我还创建了一个stackblitz示例来说明问题:我缺少什么或做错了什么?
要澄清:
答案 0 :(得分:3)
好的,这是@ViewChildren
https://stackblitz.com/edit/angular-gxmj4s?file=src%2Fapp%2Fapp.component.ts
@ViewChildren('details', { read: ViewContainerRef }) containers: QueryList<ViewContainerRef>;
thingSelected(thing: any, index: number) {
const containersArray = this.containers.toArray();
let component = containersArray[index].createComponent(this.componentFactoryResolver.resolveComponentFactory(DetailComponent));
component.instance.id = thing.id;
}
和
<div #myContainer>
<div *ngFor="let thing of things; let index = index">
<div class="inline click" (click)="thingSelected(thing, index)"> > </div>
<div class="inline">{{thing.id}}</div>
<div class="inline">{{thing.name}}</div>
<div class="inline">{{thing.value}}</div>
<div #details></div>
</div>
</div>
结果