在 Google’s official Angular 4.3.2 doc here之后,我能够从本地json文件中执行一个简单的get请求.我想练习从JSON占位符站点点击一个真正的端点,但是我在查找放在.subscribe()运算符中的内容时遇到了麻烦.我创建了一个IUser接口来捕获有效负载的字段,但是带有.subscribe(data => {this.users = data})的行会抛出错误类型’Object’不能分配给’IUser []’类型.处理这个问题的正确方法是什么？看起来非常基本,但我是一个菜鸟.

我的代码如下：

import { Component,OnInit } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { IUsers } from './users';

@Component({
  selector: 'pm-http',templateUrl: './http.component.html',styleUrls: ['./http.component.css']
})
export class HttpComponent implements OnInit {
  productUrl = 'https://jsonplaceholder.typicode.com/users';
  users: IUsers[];
  constructor(private _http: HttpClient) { }

  ngOnInit(): void {    
    this._http.get(this.productUrl).subscribe(data => {this.users = data});
  }

}

http.get<IUsers[]>(this.productUrl).subscribe(data => ...

   // or in the subscribe
   .subscribe((data: IUsers[]) => ...

users: Observable<IUsers[]>; // different type now

this.users = this.http.get<IUsers[]>(this.productUrl);

// template:
*ngFor="let user of users | async"