angular2属性'append'在类型'标题'上不存在

Question

import { Http, Headers } from '@angular/http';
   export class LoginComponent implements OnInit {
      let headers: Headers = new Headers();
      headers.append('Content-Type','application/json');}

上述代码出现以下错误。

  

'append'错误：'Headers'类型中不存在属性'append'。

如何解决？

Answer 1

试试这个。

import {OnInit} from '@angular/core';
import {Headers, Http} from '@angular/http';

export class LoginComponent implements OnInit{

  public headers: Headers;

  constructor(private http: Http) {
    this.headers = new Headers();
    this.headers.append('Content-Type', 'application/json');
    this.headers.append('Accept', 'application/json');
  }
}