我有一个组件ComponentA,显示元素列表.此列表在ngOnInit期间显示.
我有另一个组件ComponentB提供可能影响ComponentA中显示的元素列表的控件.例如.可以添加元素.
我需要一种方法来触发ComponentA的重新启动.
有人有想法吗？
细节
A是一个HeaderBar,其菜单显示“savedSearchs”列表
@Component({
selector: 'header-bar',templateUrl: 'app/headerBar/headerBar.html'
})
export class HeaderBarComponent implements OnInit{
...
ngOnInit() {
// init list of savedSearches
...
}
}
B是一个可以保存搜索的SearchComponent
@Component({
selector: 'search',templateUrl: 'app/search/search.html'
})
export class SearchComponent implements OnInit {
...
}
你需要提供组件,并将其注入组件的构造函数中,你需要像我一样调用其他组件的ngOnInit.
Plunker演示：https://plnkr.co/edit/M0d65wHjfg4KfwaQ5mPM?p=preview
//our root app component
import {Component,NgModule,VERSION,OnInit} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
@Component({
selector: 'my-app',template: `
<div>
<h2>Hello {{name}}</h2>
<comp-one></comp-one>
<comp-two></comp-two>
</div>
`,})
export class App {
name:string;
constructor( ) {
this.name = `Angular! v${VERSION.full}`
}
}
// ComponentOne with ngOnInit
@Component({
selector: 'comp-one',template: `<h2>ComponentOne</h2>`,})
export class ComponentOne implements OnInit {
ngOnInit(): void {
alert("ComponentOne ngOnInit Called")
}
}
// Added provider of ComponentOne here and injected inside constructor the on button click call ngOnInit of ComponentOne from this component
@Component({
providers:[ComponentOne],selector: 'comp-two',template: ` Component Two: <button (click)="callMe()">Call Init of ComponentOne</button>`,})
export class ComponentTwo implements OnInit {
constructor(private comp: ComponentOne ) {
this.name = `Angular! v${VERSION.full}`
}
public callMe(compName: any): void {
this.comp.ngOnInit();
}
}
@NgModule({
imports: [ BrowserModule ],declarations: [ App,ComponentOne,ComponentTwo ],bootstrap: [ App ]
})
export class AppModule {}
