By default, when you generate components, they will simply be added to the page in order, one after another. Angular 2 provides methods on the ViewContainer that allow you to reorder components once they’ve been created and provide the order that you want.
When you want to create a component and insert it at cetern position of the list. Then what you need to do is just pass in a second param, when you call 'createComponent()'.
import {Component, ViewChild, ViewContainerRef, ComponentFactoryResolver, Input} from '@angular/core';
import {SimpleService} from "../../serivces/simple.service";
import {WidgetThree} from "../widgets/widget-three.component";
@Component({
moduleId: module.id,
selector: 'home',
templateUrl: 'home.component.html'
})
export class HomeComponent {
@ViewChild('container', {
read: ViewContainerRef
}) container;
constructor(private resolver: ComponentFactoryResolver, private simpleService: SimpleService) {
}
ngAfterContentInit(){
const WidgetFactory = this.resolver.resolveComponentFactory(WidgetThree);
this.container.createComponent(WidgetFactory);
this.container.createComponent(WidgetFactory);
this.container.createComponent(WidgetFactory);
this.container.createComponent(WidgetFactory);
const comRef = this.container.createComponent(WidgetFactory); // return a componentRef
comRef.instance.message = "I am last"; // using componentRef's instance prop to access the component prop
comRef.instance.renderer.setElementStyle(
comRef.instance.input.nativeElement,
'color',
'red'
)
}
onClick(){
const WidgetFactory = this.resolver.resolveComponentFactory(WidgetThree);
const comRef = this.container.createComponent(WidgetFactory, );
comRef.instance.message = "I am third";
}
}
So when click a button, we wil call 'onClick()' method, which will create a new component and insert it at the third place in the list.