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How to share service between two modules – @NgModule in angular not between to components?5个
> Angular – shared service between components doesn’t work2个
我想使用subject将数据发送到另一个组件(用于赚钱目的).我无法取回数据.这是我的代码：
> Angular – shared service between components doesn’t work2个
我想使用subject将数据发送到另一个组件(用于赚钱目的).我无法取回数据.这是我的代码：
app.component.ts
import { Component } from '@angular/core';
import { shareService } from './share.service';
@Component({
selector: 'my-app',template: `
<hello></hello>
<button (click)="passData()">
Start
</button>
`,styleUrls: [ './app.component.css' ],providers:[shareService]
})
export class AppComponent {
constructor(private service : shareService){}
passData(){
this.service.send("hello");
}
}
hello.component.ts
import { Component,Input } from '@angular/core';
import { shareService } from './share.service';
import { Subscription } from 'rxjs/Subscription';
@Component({
selector: 'hello',template: `<h1>Hello!</h1>`,styles: [`h1 { font-family: Lato; }`],providers:[shareService]
})
export class HelloComponent {
subscription: Subscription;
constructor(private share : shareService){
this.subscription = share.subj$.subscribe(val=>{
console.log(val);
})
}
}
share.service.ts
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs/Subject';
@Injectable()
export class shareService{
private sub = new Subject();
subj$= this.sub.asObservable();
send(value: string) {
this.sub.next(value);
}
}
我没有在控制台中获得价值.
这是工作演示：DEMO
