我试图更新我的动态组件加载器从RC4到RC5,因为ComponentResolver已弃用。我已经将加载器更新为以下
@Component({
selector: 'component-dispatcher',
template: `<div #container></div>` // Define the template here because of its brevity
})
export class ComponentDispatcherComponent implements OnInit, OnDestroy {
@Input() component:any; // Some dynamic component to render
@Input() options:any; // Component configuration, optional
@Input() data:any; // Data to render within the component
// Inject the dynamic component onto the DOM
@ViewChild("container", {read: ViewContainerRef}) container:ViewContainerRef;
private componentReference:ComponentRef<any>;
constructor(private resolver:ComponentFactoryResolver) {
}
ngOnInit() {
// Create our component now we're initialised
let componentFactory = this.resolver.resolveComponentFactory(this.component);
this.componentReference = this.container.createComponent(componentFactory);
this.componentReference.instance.data = this.data;
this.componentReference.instance.options = this.options;
}
ngOnDestroy() {
// If we have a component, make sure we destroy it when we lose our owner
if (this.componentReference) {
this.componentReference.destroy();
}
}
}
并尝试将以下组件动态加载到DOM
中@Component({
selector: 'text-cell',
pipes: [IterableObjectPipe],
templateUrl: './text-cell.component.html',
styles: ['.fieldName { font-weight: bold; }']
})
export class TextCellComponent implements OnInit {
// Data to render within the component
@Input() data: any;
@Input() record: any;
// Configuration of what data to display
@Input() options: {
excludeFieldNames: boolean,
translation: string
};
constructor() {
}
ngOnInit() {
setTimeout(() => {
//console.log('***************************** ngOnInit...textCell ***********************');
this.options.translation = '' + (_.get(this.options, 'translation') || 'fields');
});
}
}
然而,当我这样做与我的TextCellComponent或任何其他组件在应用程序中,我得到以下错误
ORIGINAL EXCEPTION: No component factory found for TextCellComponent
ORIGINAL STACKTRACE:
Error: No component factory found for TextCellComponent
at NoComponentFactoryError.BaseException [as constructor]
(webpack:///./~/@angular/core/src/facade/exceptions.js?:27:23)
at new NoComponentFactoryError
我已经完成了
中的步骤https://angular.io/docs/ts/latest/cookbook/rc4-to-rc5.html
但我似乎错过了什么。我试过将组件添加到引导并全局定义它们,但没有运气。任何建议都会很有帮助。
编辑
添加模块定义
@NgModule({
imports: [
BrowserModule,
HttpModule,
FormsModule,
ReactiveFormsModule,
...MATERIAL_MODULES
],
declarations: [
...APPLICATION_PIPES,
...APPLICATION_COMPONENTS,
...APPLICATION_DIRECTIVES,
CygnusComponent,
// Component declarations
// TODO: refactor to appropriate modules
...
ComponentDispatcherComponent,
TextCellComponent,
...
],
bootstrap: [
ApplicationComponent
],
providers: [
...APPLICATION_PROVIDERS,
AppStore
]
})
export class ApplicationComponent {}
所有将要"动态"加载的组件都需要在模块的entryComponents
部分声明。换句话说,你应该像这样结束:
@NgModule({
imports: [BrowserModule, HttpModule, FormsModule, ReactiveFormsModule, ...MATERIAL_MODULES],
declarations: [...APPLICATION_PIPES, ...APPLICATION_COMPONENTS, ...APPLICATION_DIRECTIVES, CygnusComponent,
// Component declarations
// TODO: refactor to appropriate modules
...
ComponentDispatcherComponent,
TextCellComponent,
...
entryComponents: [TextCellComponent]
bootstrap: [ApplicationComponent],
providers: [...APPLICATION_PROVIDERS, AppStore]
})
export class ApplicationComponent{
请注意,您需要在 declarations
和 entryComponents
部分中列出TextCellComponent
。
您可能需要检查您的导入路径。在我的例子中,一个文件导入使用大写,而另一个使用小写。
//file 1
import { IRComponent } from "./components/IR/IR.component";
//file 2
import { IRComponent } from "./components/ir/ir.component";
泄露在Chrome网络选项卡中,我注意到文件被加载了两次(每个拼写一次)。
假设TextCellComponent
在FooModule
中声明,而负责创建动态内容的组件在模块BarModule
中。
在这种情况下,需要将FooModule
导入BarModule
@NgModule({
imports: [FooModule],
declarations: [ComponentDispatcherComponent]
})
export class BarModule {}
在我看来,这有点违背了动态的想法。我只是想要一个组件,它将创建我通过类引用发送给的任何组件。如果谁有好的解决办法,我很乐意听听。
有时你会遇到这个问题,即使你已经在EntryComponents和Declarations中给出了组件。
在这种情况下,你只需要在所有其他组件上面输入这个组件名称(这里是TextCellComponent
),如下所示:
declarations: [
TextCellComponent // Declared above
CygnusComponent,
ComponentDispatcherComponent,
...
]
这也应该在entryComponents中完成。
希望对你有帮助。
您需要在Module
中导入MatDialogModule
,以便它知道那里的entryComponents