在重新加载页面IONIC之前,登录表单不起作用

时间:2019-07-09 17:43:20

标签: html angular forms typescript ionic-framework

我在Ionic中的登录表单有问题。要么提交按钮被禁用,要么说表单无效,即使它不是无效的。偶尔也会发生该按钮起作用的情况,但是我收到一条错误消息,指出控制台中的 form无效,并且当我尝试进行console.log输入时,它们显示为空。

据我所知,这个问题可能是在实施 AuthGuard 之后开始的,如果用户未登录,我会将用户重定向到登录屏幕。在“起始页”上不会发生此问题。

奇怪的是,如果我转到注册页面,然后返回2次,该表格开始工作(如果我重新加载页面,它也开始工作)。

HTML文件:

          <form [formGroup]="loginForm">
          <ion-grid class="loginBox">
      <ion-row>
        <ion-col>
          <ion-input formControlName="email" type="email" placeholder="Email"></ion-input>
        </ion-col>
      </ion-row>
      <ion-row class="loginBoxPassword">
        <ion-col>
          <ion-input formControlName="password" type="password" placeholder="Password"></ion-input>
        </ion-col>
      </ion-row>
      <ion-row class="loginLabelRow">
        <ion-col class="loginBoxLabelLeft">
          <ion-label (click)="toSignup()" routerDirection="forward">Sign up</ion-label>
        </ion-col>
        <ion-col class="loginBoxLabelRight">
          <ion-label (click)="toForgotPassword()">Forgot password?</ion-label>
        </ion-col>
      </ion-row>
      <ion-row>
        <ion-col>
          <ion-button (click)="loginUser(loginForm)" expand="full" [disabled]="loginForm.invalid">Sign in</ion-button>
        </ion-col>
      </ion-row>

    </ion-grid>

  </form>

TS文件:

import { Component, OnInit } from '@angular/core';
import {FormGroup, FormBuilder, Validators, ReactiveFormsModule, FormControl} from '@angular/forms'
import {LoadingController, AlertController} from '@ionic/angular';
import {AuthService} from '../../services/user/auth.service';
import {Router} from '@angular/router';

     export class LoginPage implements OnInit {

  public loginForm: FormGroup;
  public loading: HTMLIonLoadingElement;

    constructor(
    private formBuilder: FormBuilder, 
    public loadingController: LoadingController, 
    private router: Router, 
    public authService: AuthService, 
    public alertController: AlertController
) {

    this.loginForm = this.formBuilder.group({
      email: ['', Validators.compose([Validators.required, Validators.email])],
      password: ['', Validators.compose([Validators.required, Validators.minLength(3)])],
    });
  }

  ngOnInit() {
  }

  toSignup(){
    this.router.navigateByUrl('signup');
  }

  toForgotPassword(){
    this.router.navigateByUrl('forgotpassword');
  }


  async loginUser(loginForm: FormGroup): Promise<void>{
    console.log(’test’, loginForm.value.email, loginForm.value.password);
    if (!loginForm.valid) {
      console.log('not valid')
    }else {
      this.loading = await this.loadingController.create({
        spinner: 'crescent',
      });
      await this.loading.present();
      const email = loginForm.value.email;
      const password = loginForm.value.password;

      this.authService.loginUser(email, password).then( () => {
        this.loading.dismiss().then(() => {
          this.router.navigateByUrl('home');
        });
      },
        error => {
          this.loading.dismiss().then(async () => {
            console.log('Wrong email or password!');
          });
        }
      );
    };
  }


}

在此先感谢您为解决此问题提供的帮助。我在Google上搜索了很多东西,却没有找到遇到类似问题的人。

1 个答案:

答案 0 :(得分:0)

不确定这是否是解决方案,但是将我的代码与您的代码进行比较,我发现您在构造函数中初始化了表单,为什么使用ngOnInit方法

您可以删除构造函数中的代码,然后将其余代码更改为

  ngOnInit() {
   this.loginForm = this.formBuilder.group({
      email: ['', Validators.compose([Validators.required, Validators.email])],
      password: ['', Validators.compose([Validators.required, Validators.minLength(3)])],
    });
  }