我的应用程序有几个功能模块,它们使用了一些常见的@Component
。所以我试图将所有这些共享组件移动到' Widget Module`,如angular.io FAQ链接here所述。
但是,当我尝试将此小部件添加到我的某个模板时,我得到了:
Error in package:./src/app/tracker/clients/client-detail.component.ts
class ClientDetailComponent - inline template:28:8 caused by:
No provider for String!
这是我尝试在功能模块中使用该共享组件的地方:
@Component({
moduleId: module.id,
selector: 'client-detail',
template: `
<save-button id="save-button" (click)="saveClient()" [isSaving]="isSaving" [disableSave]="disableSave"></save-button>
`
})
export class ClientDetailComponent implements OnInit {
isSaving: boolean = false;
disableSave: boolean = false;
constructor() { }
ngOnInit() {}
saveClient() {
this.isSaving = true;
// do some work...
this.isSaving = false;
}
这是功能模块模块:
import {SharedWidgetModule} from "../shared/shared-widget.module";
@NgModule({
imports: [
CommonModule,
FormsModule,
TrackerRoutingModule,
SharedWidgetModule
], declarations: [
TrackerComponent,
TrackerHomeComponent,
// Clients
ClientsComponent,
ClientsHomeComponent,
ClientShieldComponent,
ClientDetailComponent,
// EndClients
EndClientListComponent
], providers: [
BackendService,
ClientsService
]
})
export class TrackerModule { }
<save-button>
组件来自SharedWidgetModule:
import {NgModule} from "@angular/core";
import {SaveButtonComponent} from "./save-button/save-button.component";
import {CommonModule} from "@angular/common";
@NgModule({
imports: [CommonModule],
exports: [SaveButtonComponent, CommonModule],
declarations: [SaveButtonComponent],
providers: [],
})
export class SharedWidgetModule { }
节省-button.component.html:
<button type="submit" class="btn btn-primary" [disabled]="disableSave || isSaving">
<i *ngIf="isSaving" class="fa fa-refresh fa-spin"></i>
<i *ngIf="!isSaving" class="fa {{icon}}"></i>
{{name}}
</button>
保存-button.component.ts:
import {Component, OnInit, Input} from "@angular/core";
@Component({
moduleId: module.id,
selector: 'save-button',
templateUrl: 'save-button.component.html',
styleUrls: ['./save-button.component.scss']
})
export class SaveButtonComponent implements OnInit {
name: string;
icon: string;
@Input() isSaving: boolean;
@Input() disableSave: boolean;
constructor(name: string, icon: string) {
this.name = name || 'Save';
this.icon = icon || 'fa-floppy-o';
}
ngOnInit() { }
}
我做错了什么?
答案 0 :(得分:2)
您的问题出在constructor
的{{1}}上。对于那些Angular2元素(SaveButtonComponent
,Component
,Directive
等),构造函数是一个神圣的地方,不应该仅被原始元素污染。换句话说,Angular2将尝试使用其构造函数中的信息向您的组件注入服务,显然Injectable
和name
不是服务。
我发现你现在还没有使用它们,为什么不放弃这些原语让你的icon
空?你总是可以在以后阶段进行设置。