离子2：科尔多瓦不可用。确保包含cordova.js或在设备/模拟器中运行（在模拟器中运行） [英] Ionic 2: Cordova is not available. Make sure to include cordova.js or run in a device/simulator (running in emulator)
问题描述
我刚刚设置了我的第一个离子2应用程序（我已经相当广泛地使用了离子1）。我正在尝试使用
更新... index.html
（这只是离子生成的标准）
<！DOCTYPE html>
< html lang =endir =ltr>
< head>
< meta charset =UTF-8>
< title> Ionic App< / title>
< meta name =viewportcontent =width = device-width，initial-scale = 1.0，minimum-scale = 1.0，maximum-scale = 1.0，user-scalable = no>
< meta name =format-detectioncontent =telephone = no>
< meta name =msapplication-tap-highlightcontent =no>
< link rel =icontype =image / x-iconhref =assets / icon / favicon.ico>
< link rel =manifesthref =manifest.json>
< meta name =theme-colorcontent =＃4e8ef7> Cordova应用程序需要
<！ - cordova.js - >
< script src =cordova.js>< / script>
<！ - 取消评论此代码以启用服务工作人员
< script>
if（导航器中的'serviceWorker'）{
navigator.serviceWorker.register（'service-worker.js'）
.then（（）=> console.log（'service worker）安装'））
.catch（err => console.log（'错误'，错误））;
}
< / script> - >
< link href =build / main.css =stylesheet>
< / head>
< body>
<！ - Ionic的根组件以及应用程序将加载的位置 - >
< ion-app class =trans>< / ion-app>
<！ - 在构建过程中生成polyfills js - >
< script src =build / polyfills.js>< / script>
<！ - 在构建过程中生成包js - >
< script src =build / main.js>< / script>
< / body>
< / html>
livereload插件无法提供cordova.js文件和在开发过程中提供// mock cordova文件。
FIX：你需要去node_modules/@ionic/app-scripts/dist/dev-server/serve-config.js
并替换
exports.ANDROID_PLATFORM_PATH = path.join（'平台'，'android'，'资产'，'www'）;
到
exports.ANDROID_PLATFORM_PATH = path.join（'platforms'，'android'，'app'，'src'，'main'，'assets'，'www'）;
I just set up my first ionic 2 app (I've used ionic 1 fairly extensively). I'm trying to use the ionic-native camera preview plugin.
The setup was pretty straight forward:
npm install -g ionic cordova
ionic start timesnap --v2
ionic platform add android
ionic platform add ios
ionic plugin add cordova-plugin-camera-preview --save
Then I copied and pasted the example code into the about page:
import { CameraPreview, CameraPreviewRect } from 'ionic-native';
// camera options (Size and location)
let cameraRect: CameraPreviewRect = {
x: 100,
y: 100,
width: 200,
height: 200
};
// start camera
CameraPreview.startCamera(
cameraRect, // position and size of preview
'front', // default camera
true, // tap to take picture
false, // disable drag
true, // send the preview to the back of the screen so we can addoverlaying elements
1 //alpha
);
I launched the app using the following commands:
ionic emulate android -lcs
ionic emulate ios -lcs --target='iPhone-6'
At first the camera just wasn't showing up then I ran chrome://inspect and saw warnings about Cordova missing "try running in an emulator", but this was while running in an android emulator. I tried iOS too and saw the same results.
Any ideas why cordova isn't loading?
Here is the full error log from chrome://inspect while running in an android emulator:
Update... index.html
(it's just the standard one generated by ionic)
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="UTF-8">
<title>Ionic App</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
<meta name="format-detection" content="telephone=no">
<meta name="msapplication-tap-highlight" content="no">
<link rel="icon" type="image/x-icon" href="assets/icon/favicon.ico">
<link rel="manifest" href="manifest.json">
<meta name="theme-color" content="#4e8ef7">
<!-- cordova.js required for cordova apps -->
<script src="cordova.js"></script>
<!-- un-comment this code to enable service worker
<script>
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('service-worker.js')
.then(() => console.log('service worker installed'))
.catch(err => console.log('Error', err));
}
</script>-->
<link href="build/main.css" rel="stylesheet">
</head>
<body>
<!-- Ionic's root component and where the app will load -->
<ion-app class="trans"></ion-app>
<!-- The polyfills js is generated during the build process -->
<script src="build/polyfills.js"></script>
<!-- The bundle js is generated during the build process -->
<script src="build/main.js"></script>
</body>
</html>
The livereload plugin fails to serve cordova.js file and serves // mock cordova file during development.
FIX: You need go to node_modules/@ionic/app-scripts/dist/dev-server/serve-config.js
and replace
exports.ANDROID_PLATFORM_PATH = path.join('platforms', 'android', 'assets', 'www');
to
exports.ANDROID_PLATFORM_PATH = path.join('platforms', 'android', 'app', 'src', 'main', 'assets', 'www');
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