Angular 2显示值来自可观察 [英] Angular 2 Display value from Observable

问题描述

我想显示来自响应http的值，但是我不知道出了什么问题.

Hi I want display my value from response http but I don't know what is the problem.

http:

getAllApiContext(){
     const options = this.getOptions("...");
    return this.http
        .get("jenkins/job/api_initialization/api/json", options)
        .map((data: any) => {
            return data.json().property[0].parameterDefinitions[1].choices;
        })
}

她返回数组.

我的component.ts

My component.ts

context: Observable<Array<any>>;
ngOnInit() {
  this.jenkinsJob.getAllApiContext().subscribe(data => {
    this.context = data;
  });
};

我的component.html

My component.html

 <span *ngFor="let item of context | async">
   <p>{{item}}</p>
 </span>

推荐答案

删除ngFor中的异步.由于您已经订阅了Observable，因此无需使用异步管道

remove the async in the ngFor. since you are already subscribing to the observable, no need to use the async pipe

<span *ngFor="let item of context">

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