如何以角度 6 的形式返回值作为 observable [英] How to return value as an observable in angular 6

问题描述

我想将值(任何数据)从服务返回到组件作为可观察对象.经过几次深入研究 observables 发现以下解决方案:

I want to return value (any data) from service to component as an observable. After a couple of digging into observables found following solution:

class AppService {
    getData(value) {
        // do we have any other best way to return value as an observable
        return Observer.create((observer) => {
            observer.next(value);
        });
    }
}

class AppComponent implements OnInit {
    ngOnInit() {
        this.dataService$ = this.appService.getData().subscribe((data) => {
            // do some task with data
        });
    }
}

推荐答案

像下面一样返回

import { Observable, of } from 'rxjs';

...

getData(value) : Observable<any> {
   // Simple way of sending value using of operator.
   return Observable.of(value);
}

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