angular 4+为ngComponentOutlet动态创建的组件分配@Input

Question

在Angular 4中动态创建一个组件,你可以使用ngComponentOutlet指令:https://angular.io/docs/ts/latest/api/common/index/NgComponentOutlet-directive.html

这样的事情:

动态组件

@Component({
  selector: 'dynamic-component',
  template: `
     Dynamic component
  `
})
export class DynamicComponent {
  @Input() info: any;
}

应用

@Component({
  selector: 'my-app',
  template: `
     App<br>
     <ng-container *ngComponentOutlet="component"></ng-container>
  `
})
export class AppComponent {
  this.component=DynamicComponent;
}

如何传递@Input() info: any;此模板中的信息<ng-container *ngComponentOutlet="component"></ng-container>？

Answer 1

在pull请求中讨论了这样的功能,ngComponentOutlet但现在已被删除.即使是componentRef目前在https://angular.io/docs/ts/latest/api/common/index/NgComponentOutlet-directive.html中显示的内容也不公开,因此无法使用https://github.com/angular/angular/blob /3ef73c2b1945340ca6bd21f1790260c88698ae26/modules/%40angular/common/src/directives/ng_component_outlet.ts#L78

我建议你创建自己的指令派生自https://github.com/angular/angular/blob/3ef73c2b1945340ca6bd21f1790260c88698ae26/modules/%40angular/common/src/directives/ng_component_outlet.ts#L72

并使用用户单击选定的组件为Angular 2动态选项卡中显示的输入分配值

this.compRef.instance.someProperty = 'someValue';

Answer 2

在@GünterZöchbauer的帖子的帮助下,我用这种方式解决了类似的问题 - 我希望你能以某种方式适应它.

首先我定义了一些接口:

// all dynamically loaded components should implement this guy
export interface IDynamicComponent { Context: object; }

// data from parent to dynLoadedComponent
export interface IDynamicComponentData {
  component: any;
  context?: object;
  caller?: any;
}

然后我在动态加载的组件中实现了它们

dynamicLoadedComponentA.ts

// ...
export class DynamicLoadedComponentA implements IDynamicComponent {
// ...

// data from parent
public Context: object;

// ...

之后我构建了一个负责魔术的新组件.这里重要的是我必须注册所有dyn.加载组件作为entryComponents.

dynamic.component.ts

@Component({
  selector: 'ngc-dynamic-component',
  template: ´<ng-template #dynamicContainer></ng-template>´,
  entryComponents: [ DynamicLoadedComponentA ]
})
export class DynamicComponent implements OnInit, OnDestroy, OnChanges {
  @ViewChild('dynamicContainer', { read: ViewContainerRef }) public dynamicContainer: ViewContainerRef;

  @Input() public componentData: IDynamicComponentData;

  private componentRef: ComponentRef<any>;
  private componentInstance: IDynamicComponent;

  constructor(private resolver: ComponentFactoryResolver) { }

  public ngOnInit() {
    this.createComponent();
  }

  public ngOnChanges(changes: SimpleChanges) {
    if (changes['componentData']) {
      this.createComponent();
    }
  }

  public ngOnDestroy() {
    if (this.componentInstance) {
      this.componentInstance = null;
    }
    if (this.componentRef) {
      this.componentRef.destroy();
    }
  }

  private createComponent() {
    this.dynamicContainer.clear();
    if (this.componentData && this.componentData.component) {
      const factory: ComponentFactory<any> = this.resolver.resolveComponentFactory(this.componentData.component);
      this.componentRef = this.dynamicContainer.createComponent(factory);
      this.componentInstance = this.componentRef.instance as IDynamicComponent;

      // fill context data
      Object.assign(this.componentInstance.Context, this.componentData.context || {});

      // register output events
      // this.componentRef.instance.outputTrigger.subscribe(event => console.log(event));
    }
  }
}

这里使用这个闪亮的新东西:

app.html

<!-- [...] -->
<div>
  <ngc-dynamic-component [componentData]="_settingsData"></ngc-dynamic-component>
</div>
<!-- [...] -->

app.ts

// ...
  private _settingsData: IDynamicComponent = {
    component: DynamicLoadedComponentA,
    context: { SomeValue: 42 },
    caller: this
  };
// ...

Answer 3

我想现在你可以使用

https://www.npmjs.com/package/ng-dynamic-component

它专门针对这个问题而制作