Ionic 2 X页面错误是2个模块声明的一部分

Question

我在这里经历过SO问题。但我无法得到这个错误试图建议的内容。请帮我解决这个问题。

最后，HIGHER MODULE意味着哪个模块。因为我对此不熟悉这就是为什么不能正确理解这一点。

mycode的：

app.module.ts

   @NgModule({
  declarations: [
    MyApp,
    UsersPage,
    ReposPage,
    OrganisationsPage,
    UserDetailsPage,
    LoginPage

  ],
  imports: [

    BrowserModule,
    HttpModule,
    IonicModule.forRoot(MyApp),

  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    LoginPage,
    UsersPage,
    ReposPage,
    OrganisationsPage,
    UserDetailsPage,


  ],

Login.module.ts

import { NgModule } from '@angular/core';
import { IonicPageModule,IonicPage } from 'ionic-angular';
import { LoginPage } from './login';
//import { IonicPage } from 'ionic-angular';

@IonicPage()
@NgModule({
  declarations: [
    LoginPage,
  ],
  imports: [
    IonicPageModule.forChild(LoginPage),
  ],
  entryComponents: [
    LoginPage
  ],
  exports: [
    LoginPage
  ]
})
export class LoginPageModule {}

根据您的评论更新代码

app.module.ts

import { Component } from '@angular/core';
import { NavController, AlertController, LoadingController, Loading, IonicPage } from 'ionic-angular';
import { AuthService } from '../../providers/auth-service';


@IonicPage()
@Component({
  selector: 'page-login',
  templateUrl: 'login.html',
})
export class LoginPage {
  loading: Loading;
  registerCredentials = { email: '', password: '' };

  constructor(private nav: NavController, private auth: AuthService, private alertCtrl: AlertController, private loadingCtrl: LoadingController) { }

  public createAccount() {
    this.nav.push('RegisterPage');
  }

  public login() {
    this.showLoading()
    this.auth.login(this.registerCredentials).subscribe(allowed => {
      console.log(allowed)
      if (allowed) {        
        this.nav.setRoot('HomePage');
      } else {
        this.showError("Access Denied");
      }
    },
      error => {
        this.showError(error);
      });
  }

  showLoading() {
    this.loading = this.loadingCtrl.create({
      content: 'Please wait...',
      dismissOnPageChange: true
    });
    this.loading.present();
  }

  showError(text) {
    this.loading.dismiss();

    let alert = this.alertCtrl.create({
      title: 'Fail',
      subTitle: text,
      buttons: ['OK']
    });
    alert.present(prompt);
  }
}

login.module.ts

import { NgModule } from '@angular/core';
import { IonicPageModule,IonicPage } from 'ionic-angular';
import { LoginPage } from './login';
//import { IonicPage } from 'ionic-angular';


@NgModule({
  declarations: [
    LoginPage,
  ],
  imports: [
    IonicPageModule.forChild(LoginPage),
  ],
  entryComponents: [
    LoginPage
  ],
  exports: [
    LoginPage
  ]
})
export class LoginPageModule {}

login.ts

import { Component } from '@angular/core';
import { NavController, AlertController, LoadingController, Loading, IonicPage } from 'ionic-angular';
import { AuthService } from '../../providers/auth-service';


@IonicPage()
@Component({
  selector: 'page-login',
  templateUrl: 'login.html',
})
export class LoginPage {
  loading: Loading;
  registerCredentials = { email: '', password: '' };

  constructor(private nav: NavController, private auth: AuthService, private alertCtrl: AlertController, private loadingCtrl: LoadingController) { }

  public createAccount() {
    this.nav.push('RegisterPage');
  }

  public login() {
    this.showLoading()
    this.auth.login(this.registerCredentials).subscribe(allowed => {
      console.log(allowed)
      if (allowed) {        
        this.nav.setRoot('HomePage');
      } else {
        this.showError("Access Denied");
      }
    },
      error => {
        this.showError(error);
      });
  }

  showLoading() {
    this.loading = this.loadingCtrl.create({
      content: 'Please wait...',
      dismissOnPageChange: true
    });
    this.loading.present();
  }

  showError(text) {
    this.loading.dismiss();

    let alert = this.alertCtrl.create({
      title: 'Fail',
      subTitle: text,
      buttons: ['OK']
    });
    alert.present(prompt);
  }
}

Answer 1

我假设你正在使用Ionic的Lazy Load功能。该错误的含义是，您在LoginPage（declarations文件）中的NgModule AppModule数组中包含了app.module.ts LoginPageModule。

要解决此问题，请删除LoginPage的{​​{1}}声明，如果您需要在应用中的某处使用AppModule（例如，如果您想要推送）那个页面），使用名称，但作为字符串，如下所示：

LoginPage

由于页面名称现在是一个字符串，因此不再需要导入// Somewhere in your app this.navCtrl.push('LoginPage'); // <- The name of the page is used as a string

LoginPage

<强>更新

就像您在docs中看到的那样（感谢@suraj），请检查您是否正在创建// import { LoginPage } from '/path/to/login-page.ts'; <- You won't need to do this anymore 的模块：

LoginPage

还要检查您是否将@NgModule({ declarations: [ MyPage ], imports: [ IonicPageModule.forChild(MyPage) ], entryComponents: [ MyPage ] }) export class MyPageModule {} 装饰器添加到页面中：

@IonicPage()