node.js - ionic 2 构建类型错误 : Cannot read property 'AssetUrl' of undefined

Question

Ionic 2 失败的 CLI 构建 给我以下错误:“TypeError:无法读取未定义的属性‘AssetUrl’”。

我的研究让我找到了 this thread和 this one .

两个线程都建议修改“package.json”文件，去掉“dependencies”和“devDependencies”中版本前的“^”符号。

我这样做了，然后是 CLI:

• ionic rm 平台 android
• ionic 添加平台 android
• 最后:ionic build android

我仍然遇到同样的错误。

在 this thread 的某个时刻，它建议使用一些我还不熟悉的 npm 命令，引用它:“rm -rf node_modules and npm cache clean and a fresh npm install”。 我真的不明白这一切的背后是什么。

如果有人想出神奇的解决方案使构建运行良好，我将不胜感激。但我也想了解如何将“TypeError:无法读取未定义的属性‘AssetUrl’”与“package.json”联系起来？我不明白为什么这个错误会导致那个可能的解决方案。

我的版本是:npm 3.10.3 Node 6.7.0 Cordova 6.3.1 ionic 2.1.0

这是我的 package.json，在执行两个线程中读取的建议后现在看起来是这样的:

{
  "name": "ionic-hello-world",
  "author": "Ionic Framework",
  "homepage": "http://ionicframework.com/",
  "private": true,
  "scripts": {
    "build": "ionic-app-scripts build",
    "watch": "ionic-app-scripts watch",
    "serve:before": "watch",
    "emulate:before": "build",
    "deploy:before": "build",
    "build:before": "build",
    "run:before": "build"
  },
  "dependencies": {
    "@angular/common": "2.0.0",
    "@angular/compiler": "2.0.0",
    "@angular/compiler-cli": "0.6.2",
    "@angular/core": "2.0.0",
    "@angular/forms": "2.0.0",
    "@angular/http": "2.0.0",
    "@angular/platform-browser": "2.0.0",
    "@angular/platform-browser-dynamic": "2.0.0",
    "@angular/platform-server": "2.0.0",
    "ionic-angular": "2.0.0-rc.0",
    "ionicons": "3.0.0",
    "@ionic/storage": "1.0.3",
    "ionic-native": "2.0.3",
    "rxjs": "5.0.0-beta.12",
    "zone.js": "0.6.21"
  },
  "devDependencies": {
    "@ionic/app-scripts": "0.0.36",
    "typescript": "2.0.3"
  },
  "description": "HelloWorld: An Ionic project",
  "cordovaPlugins": [
    "cordova-plugin-device",
    "cordova-plugin-console",
    "cordova-plugin-whitelist",
    "cordova-plugin-splashscreen",
    "cordova-plugin-statusbar",
    "ionic-plugin-keyboard"
  ],
  "cordovaPlatforms": []
}

Answer 1

我在项目文件夹中的 CLI 中做了一个“npm install”+ 去掉 package.json 中“dependencies”和“devDependencies”前面的“^”符号(如链接在我的问题)。它解决了这个问题。