打字稿错误-Angular AoT构建失败-Node.js + Ionic移动应用

Question

我正在尝试创建一个显示随机文本和图片（文本和图片的选择存储在数组中）的Android应用（Node.js + Ionic）。我正在尝试在手机上安装此应用。该应用程序可在Chrome中运行。

当我在命令提示符下提供ionic serve命令时，它在Chrome中完美运行，每当我按下下一个按钮时，Random1都会提供一个随机文本和一个随机图片，每当我按下下一个按钮时，Random2仅会提供一个随机图片。当我在命令提示符下给出“ ionic cordova run android --prod --release”命令时，出现以下错误：

[16:54:50]  build prod started ...
[16:54:50]  clean started ...
[16:54:50]  clean finished in 6 ms
[16:54:50]  copy started ...
[16:54:50]  deeplinks started ...
[16:54:50]  deeplinks finished in 84 ms
[16:54:50]  ngc started ...
[16:55:02]  typescript error
            Type Random1Page in
            C:/.../pages/random1/random1.ts is part of the declarations of 2 modules: AppModule in
            C:/.../app/app.module.ts and
            Random1PageModule in
            C:/.../pages/random1/random1.module.ts!
            Please consider moving Random1Page in
            C:/.../pages/random1/random1.ts to a higher module that imports AppModule in
            C:/.../app/app.module.ts and Random1PageModule in
            C:/.../pages/random1/random1.module.ts. You
            can also create a new NgModule that exports and includes Random1Pag
e in C:/.../pages/random1/random1.ts then import that NgModule in AppModule in
            C:/.../app/app.module.ts and
            Random1PageModule in
            C:/.../pages/random1/random1.module.ts.
Typescript error - Error: The Angular AoT build failed. See the issues above
    at C:/...\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:237:55
    at step (C:/...\no
de_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:32:23)
    at Object.next (C:/...\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:13:53)
    at fulfilled (C:/...\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:4:58)
    at anonymous

我从离子应用程序的文件夹发出了此命令。此文件夹包含以下文件夹：

这是发出此命令的正确文件夹吗？

random1.ts：

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { Random2Page } from '../random2/random2';

@IonicPage()
@Component({
  selector: 'page-random1',
  templateUrl: 'random1.html',
})
export class Random1Page {
  random1_arr: string[]= ["text1", "text2", "text3"];
  random1_act: string;
  image_arr: string[]= ["../assets/imgs/Pic1.jpg", "../assets/imgs/Pic2.jpg"];
  image_act: string;
  person_arr: string[]= ["person1", "person2"];
  person_act: string;
  person_not_act: string;
  counter= 0;

  constructor(public navCtrl: NavController, public navParams: NavParams) {
    this.image_act= '';
    let random_index= Math.floor(Math.random() * 2);
    this.person_act= this.person_arr[random_index];
    this.person_not_act= this.person_arr[random_index? 0: 1];
    this.GenerateRandom1PicturePerson();
  }

  GenerateRandom1PicturePerson() {
    this.random1_act= this.random1_arr[Math.floor(Math.random() * this.random1_arr.length)];
    this.image_act= this.image_arr[Math.floor(Math.random() * this.image_arr.length)];
    this.person_act= [this.person_not_act, this.person_not_act= this.person_act][0];
    this.counter++;

    if(this.counter >= 7) {
      this.navCtrl.push(Random2Page);
    }
  }
}

app.module.ts：

import { BrowserModule } from '@angular/platform-browser';
import { ErrorHandler, NgModule } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';

import { MyApp } from './app.component';
import { HomePage } from '../pages/home/home';
import { ListPage } from '../pages/list/list';
import { Random1Page } from '../pages/random1/random1';
import { Random2Page } from '../pages/random2/random2';
import { LoggedinPage } from '../pages/loggedin/loggedin';

import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';

@NgModule({
  declarations: [
    MyApp,
    HomePage,
    ListPage,
    Random1Page,
    Random2Page,
    LoggedinPage
  ],
  imports: [
    BrowserModule,
    IonicModule.forRoot(MyApp),
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HomePage,
    ListPage,
    Random1Page,
    Random2Page,
    LoggedinPage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

Answer 1

根据您的问题，我们不确定您是否要使用延迟加载的页面。如果您确实想使用延迟加载的页面（这样做会提高应用程序的性能），那么以下步骤将帮助您解决问题。

如果您不想在应用程序中使用延迟加载的页面，请查看@Sampath的答案。

当您@IonicPage()在任何页面上添加内容时：

@IonicPage() // <-- Here!
@Component({
  selector: 'page-random1',
  templateUrl: 'random1.html',
})
export class Random1Page { ... }

表示它将被延迟加载。您还应该random1.module.ts在该页面的同一目录中有一个文件，如下所示：

import { NgModule } from '@angular/core';
import { IonicPageModule } from 'ionic-angular';
import { Random1Page } from './random1';

@NgModule({
  declarations: [
    Random1Page,
  ],
  imports: [
    IonicPageModule.forChild(Random1Page),
  ],
})
export class Random1PageModule {}

正如您在最后一个文件中看到的那样，它Random1Page是Random1PageModulemodule的一部分。

现在回到错误信息：

打字稿错误类型Random1Page在C：/.../页/ random1 / random1.ts 是2个模块中的声明的部分：的AppModule在C：/.../应用程序/ app.module.ts 和 Random1PageModule在C：/ ... / pages / random1 / random1.module.ts！

因此，为了对其进行修复，您需要从文件中的AppModule位置删除该页面（以及所有其他延迟加载的页面）app.module.ts：

import { BrowserModule } from '@angular/platform-browser';
import { ErrorHandler, NgModule } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';

import { MyApp } from './app.component';

import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';

@NgModule({
  declarations: [
    MyApp
    // HomePage,
    // ListPage,
    // Random1Page, <-- Remove it from here
    // Random2Page,
    // LoggedinPage
  ],
  imports: [
    BrowserModule,
    IonicModule.forRoot(MyApp),
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp
    // HomePage,
    // ListPage,
    // Random1Page, <-- And also from here
    // Random2Page,
    // LoggedinPage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

您可以在Ionic博客中找到有关延迟加载的更多信息：

• 离子和惰性加载Pt 1
• 离子和惰性加载Pt 2