Question

我想创建动态组件并将这些组件的视图插入到容器中。

我认为这可以通过ViewContainerRef实现。

但我不知道，我们可以获得ViewContainerRef任何组件吗？如果是的话怎么样？我是Angular的新手，如果有任何其他好的解决方案可以处理这种情况，请建议我。

更新我想，我非常接近解决方案。以下是代码。

app.component.ts

import {Component} from '@angular/core';
import {ContainerComponet} from './container.component'

@Component({
    selector: 'my-app',
    template: `
    <container> </container>
    `,
    directives: [ContainerComponet]
})
export class AppComponent {

    constructor() { }

 }

container.component.ts

import {Component, ComponentResolver, ViewContainerRef} from '@angular/core'
import {controlBoxComponent as controlBox} from './controlBox.component';

@Component({
    selector: 'container',
    template: 'container'    
})
export class ContainerComponet {
    constructor(viewContainer: ViewContainerRef, private _cr: ComponentResolver) {

        this._cr.resolveComponent(controlBox)
            .then(cmpFactory => {
                const ctxInjector = viewContainer.injector;
                return viewContainer.createComponent(cmpFactory, 0,  ctxInjector);
            })

    }
}

controlBox.component.ts

import {Component} from '@angular/core'
@Component({
    selector: 'controlBox',
    template: 'controlBox'
})
export class controlBoxComponent {
    constructor() { }
}

输出

<my-app>
    <container>container</container><controlbox _ngcontent-lsn-3="">controlBox</controlbox>
</my-app>

预期结果

<my-app>
    <container>container
    <controlbox _ngcontent-lsn-3="">controlBox</controlbox>
    </container>
</my-app>

Answer 1

您可以通过当前组件视图中的元素获取当前组件的ViewContainerRef

@Component({
  selector: '...',
  directives: [OtherComponent, FooComponent],
  template: `
    <other-component></other-component>
    <foo-component #foo></foo-component>
    <div #div></div>`
})

export class SomeComponent {
  // `ViewContainerRef` from an element in the view
  @ViewChild(OtherComponent, {read: ViewContainerRef}) other;
  @ViewChild('foo', {read: ViewContainerRef}) foo;
  @ViewChild('div', {read: ViewContainerRef}) div;

  // `ViewContainerRef` from the component itself
  constructor(private viewContainerRef:ViewContainerRef, private componentFactoryResolver: ComponentFactoryResolver) {}

  let factory = this.componentFactoryResolver.resolveComponentFactory(ControlBox)
  this.componentRef = this.other.createComponent(factory);
  // this.componentRef = this.foo.createComponent(factory);
  // this.componentRef = this.div.createComponent(factory);
  // this.componentRef = this.viewContainerRef.createComponent(factory);
  });
}

另见Angular 2 dynamic tabs with user-click chosen components

Answer 2

我为我的应用做了类似的事情。在表格中加载数据。

为此，我创建了一个指令：

directives: [TableDirective]

然后我就这样使用它：

@ViewChild(TableDirective) tableDirective:TableDirective;

ngAfterViewInit() {
    setTimeout(_=>this.load());
}

load() {
    this.tableDirective.loadTable(*ADirectiveToLoad*);
}

TableDirective文件：

import { Component, DynamicComponentLoader, ViewContainerRef } from 'angular2/core';

@Component({
    selector: "my-table",
    template: `<my-data></my-data>`
})

export class TableDirective {
    constructor(
        private dcl:DynamicComponentLoader,
        private viewContainerRef:ViewContainerRef) {
    }

public loadTable(base:any) {
    this.viewContainerRef.clear();
    this.dcl.loadNextToLocation(base, this.viewContainerRef);
}
}

这将在我的表中加载数据，取决于我发送的指令。例如：

import { Component, OnInit } from 'angular2/core';

@Component({
    selector: "my-data",
    templateUrl: "app/_includes/table/actionnaire/table.html"
})

export class ActionnaireDirective implements OnInit {
    private entity:any;

ngOnInit() {
    this.entity = ACTIONNAIRES_PORTEUR;
}
}

var ACTIONNAIRES_PORTEUR:Actionnaire[] = [
    {"id": 1, "nom": "Test", "prenom": "Testeur", "dateNaissance": "15/05/1995"}
];

export class Actionnaire {
    id:number;
    nom:string;
    prenom:string;
    dateNaissance:any;
}

我也是Angular的新手：x

Answer 3

我也在寻找这个问题的解决方案。

我能够实现这一目标的唯一方法是使用额外的Component

import {Component, ViewContainerRef} from '@angular/core';

@Component({
    selector: 'sw-view-container-ref',
    template: `<div></div>`
})

export class SwViewContainerRef {

    private _viewContainerRef:ViewContainerRef;

    constructor(viewContainerRef:ViewContainerRef) {
        this._viewContainerRef = viewContainerRef;
    }

    get viewContainerRef():ViewContainerRef {
        return this._viewContainerRef;
    }
}

container.component.ts

import {Component, ComponentResolver, ViewContainerRef, AfterViewInit, ViewChild,Injector} from '@angular/core'
import {controlBoxComponent as controlBox} from './controlBox.component';
import {SwViewContainerRef} from "./sw-view-container-ref";

@Component({
    selector: 'container',
    template: 'container<sw-view-container-ref #swViewContainerRef></sw-view-container-ref>',
    directives: [SwViewContainerRef]
})
export class ContainerComponet implements AfterViewInit {

    @ViewChild('swViewContainerRef', SwViewContainerRef) swViewChild:SwViewContainerRef;

    ngAfterViewInit() {
        this.desiredViewContainerRef = this.swViewChild.viewContainerRef;

        var self = this;

        this._cr.resolveComponent(controlBox).then((factory) => {

            var componentRef = self.desiredViewContainerRef.createComponent(factory, null, self.injector, null);
            componentRef.changeDetectorRef.detectChanges();
            componentRef.onDestroy(()=> {
                componentRef.changeDetectorRef.detach();
            })

            return componentRef;
        });
    }

    public desiredViewContainerRef:ViewContainerRef;

    constructor(private _cr: ComponentResolver, public injector:Injector) {

    }
}

它应该产生类似的东西。

<my-app>
<container>container
<sw-view-container-ref><div></div></sw-view-container-ref>
<controlbox>controlBox</controlbox>
</container>
</my-app>

我不确定我的示例是否清晰或有效，随时提出问题或提出建议，我会尝试回答并更新我的示例。

如何将动态组件放入容器中

3 个答案: