Http.post不工作​​角6

我使用 this tool根据我的模型生成了我的实体组件和服务.

一切正常,但我在尝试在API中记录用户时遇到了问题(功能正常).

http.post()方法未被触发.我对角度很新,也无法弄清楚我做错了什么.

任何帮助都会很棒！

这是我的UserService的登录方法(该方法被正确调用,它只是http.post()不起作用)：

/**
 * Log a user by its credentials.
 */
login(username : string, password : string) : Observable<NmUser> {
    let body = JSON.stringify({
        'username': username,
        'password': password
    });
    console.log(body);
    return this.http.post(this.userUrl + 'login', body, httpOptions)
        .pipe(
            map(response => new NmUser(response)),
            catchError(this.handleError)
        );
} // sample method from angular doc
private handleError (error: HttpErrorResponse) {
    // TODO: seems we cannot use messageService from here...
    let errMsg = (error.message) ? error.message : 'Server error';
    console.error(errMsg);
    if (error.status === 401 ) {
        window.location.href = '/';
    }
    return Observable.throw(errMsg);
}

这是调用登录功能的页面：

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { NmUserService } from '../../app/entities/nmUser/nmUser.service';

@Component({
  selector: 'page-login',
  templateUrl: 'login.html',
  providers: [NmUserService]
})
export class LoginPage {

  constructor(private navCtrl: NavController, private userService: NmUserService) {

  }

  login(username: string, password: string): void {
    this.userService.login(username, password);
  }

}

谢谢 ！

除非您订阅了observable,否则永远不会进行HTTP调用,这在组件中完成,如下所示：

this.userService.login(username, password).subscribe((result) => {
    // This code will be executed when the HTTP call returns successfully 
});