登录表单在重新加载 IONIC 页面之前不起作用



我在 Ionic 中的登录表单有问题。提交按钮被禁用,表示表单无效,即使它不是。偶尔也会发生的是按钮有效,但我收到一条错误消息,指出表单在控制台中无效,当我尝试控制台时.log输入,它们显示为 null。

据我所知,这个问题可能是在我实施 AuthGuard 之后开始的,如果用户没有登录,我会将用户重定向到登录屏幕。当我将登录页面作为"入门页面"时,不会出现此问题。

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

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!');
          });
        }
      );
    };
  }

}

提前感谢您在解决此问题方面的任何帮助。我用谷歌搜索了很多,但没有找到任何有类似问题的人。

不确定这是否是解决方案,但将我的代码与您的代码进行比较,我看到您在构造函数中初始化表单,为什么我使用 ngOnInit 方法

这样做

你能删除构造函数中的代码并将其余部分更改为

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

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