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我创建了一个 Angular 6 组件库。该库基于 PrimeNG 组件。库中的组件之一是表格组件(基于 PrimeNG 表格)

为了允许库的用户在表的单元格中添加动态模板,我(在库中)创建了一个名为“VarintComponent”的组件,该组件有两个输入:

1)GuestComponent:字符串

2)GuestComponentData:任何

表的用户可以声明一列包含 VariantComponent,并将组件的名称传递给 GuestComponent 输入。componentFactoryResolver在运行时,VariantComponent 使用和动态创建和加载组件viewContainerRef

import { Component, OnInit, Input, ViewChild, ComponentFactoryResolver } from '@angular/core';
import { Type } from '@angular/core';
import { VariantComponentDirective } from './variant-component.directive';

@Component({
  selector: 'o-variant',
  template: `
        <ng-template variantComponent></ng-template>
        `
})
export class VariantComponent implements OnInit {
  @Input() GuestComponent: String;
  @Input() GeustComponentData: any;

  @ViewChild(VariantComponentDirective) variantHost: VariantComponentDirective;

  constructor(private componentFactoryResolver: ComponentFactoryResolver) { }

  ngOnInit() {
    this.loadComponent();
  }

  loadComponent() {
    const viewContainerRef = this.variantHost.viewContainerRef;
    viewContainerRef.clear();

    const factories = Array.from(this.componentFactoryResolver['_factories'].keys());
    const factoryClass = <Type<any>>factories.find((x: any) => x.name === (this.GuestComponent));
    const factory = this.componentFactoryResolver.resolveComponentFactory(factoryClass);
    const compRef = viewContainerRef.createComponent(factory);

    (<any>compRef.instance).data = this.GeustComponentData;
  }

}

来宾组件需要实现简单的接口以托管在 VariantComponent 中。

访客组件也被声明为它们模块的“<code>entryComponents”。

在不同的项目中使用该表时,我可以看到所有工作正常,并且 Gust 组件正确托管在 VarintComponent 中并显示在表中。

问题是,在构建生产包(使用ng build --prod)时,我得到:

main.11fb9744a37aae5b78f8.js:1 ERROR Error: No component factory found for undefined. Did you add it to @NgModule.entryComponents?

无论来宾组件位于库还是客户端项目中,我都会收到此错误。

如果我使用ng build --build-optimizer=false

4

1 回答 1

1

发现了问题。问题出在以下行:

const factoryClass = <Type<any>>factories.find((x: any) => x.name === (this.GuestComponent));

当使用--prod包进行打包时,类名被更改,因此我们无法按名称进行比较。所以我们需要通过引用传递组件。以下代码效果很好:

import { Component, OnInit, Input, ViewChild, ComponentFactoryResolver } from '@angular/core';
import { VariantComponentDirective } from './variant-component.directive';


@Component({
  selector: 'o-variant',
  template: `
        <ng-template variantComponent></ng-template>
        `
})
export class VariantComponent implements OnInit {
  @Input() GuestComponent: any;
  @Input() GeustComponentData: any;

  @ViewChild(VariantComponentDirective) variantHost: VariantComponentDirective;

  constructor(private componentFactoryResolver: ComponentFactoryResolver) { }

  ngOnInit() {
    this.loadComponent();
  }

  loadComponent() {
    const viewContainerRef = this.variantHost.viewContainerRef;
    viewContainerRef.clear();
    const factory = this.componentFactoryResolver.resolveComponentFactory(this.GuestComponent);
    const compRef = viewContainerRef.createComponent(factory);
    (<any>compRef.instance).data = this.GeustComponentData;
  }

}
于 2018-08-29T14:18:35.823 回答