我有一个 ComponentA 组件显示元素列表。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。可以添加一个元素。
我需要一种方法触发ComponentA的重新启动。
有人有想法吗?
详情
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 是可以保存搜索的SearchComponent
@Component({
selector: 'search',
templateUrl: 'app/search/search.html'
})
export class SearchComponent implements OnInit {
...
}
答案 0 :(得分:9)
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 Demo: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 {}