我想使用材质CDK中的新Portal将动态内容注入表单的多个部分。
我有一个复杂的表单结构,目标是有一个表单,指定子组件可以(或不)注入模板的多个位置。
也许CDK门户网站不是最好的解决方案吗?
我尝试了一些东西,但我确信这不是做法: https://stackblitz.com/edit/angular-yuz1kg
我也尝试使用new ComponentPortal(MyPortalComponent)
,但我们如何在其上设置输入?通常类似于componentRef.component.instance.myInput
答案 0 :(得分:19)
您可以创建自定义注入器并将其注入您创建的组件门户。 -
createInjector(dataToPass): PortalInjector {
const injectorTokens = new WeakMap();
injectorTokens.set(CONTAINER_DATA, dataToPass);
return new PortalInjector(this._injector, injectorTokens);
}
CONTAINER_DATA
是由
InjectorToken
)
export const CONTAINER_DATA = new InjectionToken<{}>('CONTAINER_DATA');
要使用创建的注入器,请使用 -
let containerPortal = new ComponentPortal(ComponentToPort, null, this.createInjector({
data1,
data2
}));
overlay.attach(containerPortal);
overlay
是OverlayRef
(Portal Outlet)的实例
在ComponentToPort
内,您需要注入创建的注入器 -
@Inject(CONTAINER_DATA) public componentData: any
此处有更多相关信息 -
答案 1 :(得分:8)
如果您使用的是Angular 10以及Awadhoot's answer之后的版本,则不建议使用PortalInjector,而不是:
new PortalInjector(this.injector, new WeakMap([[SOME_TOKEN, data]]))
您现在拥有:
Injector.create({
parent: this.injector,
providers: [
{ provide: SOME_TOKEN, useValue: data }
]
})
答案 2 :(得分:6)
您可以使用在Not Found
ComponentPortal
修复语法问题:
ComponentPortal
这是代码
Can't resolve all parameters for Component: ([object Object], [object Object], ?
答案 3 :(得分:5)
使用cdkPortalOutlet和(附加的)发射器
,这似乎更简单。import {Component, ComponentRef, AfterViewInit, TemplateRef, ViewChild, ViewContainerRef, Input, OnInit} from '@angular/core';
import {ComponentPortal, CdkPortalOutletAttachedRef, Portal, TemplatePortal, CdkPortalOutlet} from '@angular/cdk/portal';
/**
* @title Portal overview
*/
@Component({
selector: 'cdk-portal-overview-example',
template: '<ng-template [cdkPortalOutlet]="componentPortal" (attached)=foo($event)></ng-template>',
styleUrls: ['cdk-portal-overview-example.css'],
})
export class CdkPortalOverviewExample implements OnInit {
componentPortal: ComponentPortal<ComponentPortalExample>;
constructor(private _viewContainerRef: ViewContainerRef) {}
ngOnInit() {
this.componentPortal = new ComponentPortal(ComponentPortalExample);
}
foo(ref: CdkPortalOutletAttachedRef) {
ref = ref as ComponentRef<ComponentPortalExample>;
ref.instance.message = 'zap';
}
}
@Component({
selector: 'component-portal-example',
template: 'Hello, this is a component portal {{message}}'
})
export class ComponentPortalExample {
@Input() message: string;
}
答案 4 :(得分:3)
可以通过以下方式设置组件输入(或以可见的方式绑定到输出):
portal = new ComponentPortal(MyComponent);
this.portalHost = new DomPortalHost(
this.elementRef.nativeElement,
this.componentFactoryResolver,
this.appRef,
this.injector
);
const componentRef = this.portalHost.attach(this.portal);
componentRef.instance.myInput = data;
componentRef.instance.myOutput.subscribe(...);
componentRef.changeDetectorRef.detectChanges();
答案 5 :(得分:2)
不建议使用角度9版本“ DomPortalHost”,并将其更改为“ DomPortalOutlet”。所以现在它将是:
this.portalHost = new DomPortalOutlet(
this.elementRef.nativeElement,
this.componentFactoryResolver,
this.appRef,
this.injector
);
const componentRef = this.portalHost.attachComponentPortal(this.portal);
componentRef.instance.myInput = data;
除此之外,我觉得最好的解决方案是绑定(附加)事件并在那里设置输入:
<ng-template [cdkPortalOutlet]="yourPortal" (attached)="setInputs($event)"> </ng-template>
并在ts中设置您的输入:
setInputs(portalOutletRef: CdkPortalOutletAttachedRef) {
portalOutletRef = portalOutletRef as ComponentRef<myComponent>;
portalOutletRef.instance.inputPropertyName = data;
}