Question

我是移动应用程序开发的新手。为了学习目的，我构建了一个扫描条形码并显示文本的应用程序。

app.js

var app  = angular.module('starter', ['ionic','ngCordova'])

.run(function($ionicPlatform) {
  $ionicPlatform.ready(function() {

    if (window.cordova && window.cordova.plugins && window.cordova.plugins.Keyboard) {
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
      cordova.plugins.Keyboard.disableScroll(true);

    }
    if (window.StatusBar) {
      // org.apache.cordova.statusbar required
      StatusBar.styleDefault();
    }
  });
});   

app.controller('ExampleController',function($scope,$cordovaBarcodeScanner){

  $scope.scanBarcode = function () {

    $cordovaBarcodeScanner.scan().then(function (imageData) {
        alert(imageData.text);
    },function (error) {
      console.log(error);
    });
  }

});

的index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
    <title></title>

    <link href="lib/ionic/css/ionic.css" rel="stylesheet">
    <link href="css/style.css" rel="stylesheet">

    <!-- IF using Sass (run gulp sass first), then uncomment below and remove the CSS includes above
    <link href="css/ionic.app.css" rel="stylesheet">
    -->

    <!-- ionic/angularjs js -->
    <script src="lib/ionic/js/ionic.bundle.js"></script>

    <!-- cordova script (this will be a 404 during development) -->
    <script src="cordova.js"></script>

    <!-- your app's js -->
    <script src="js/app.js"></script>
    <script src="js/controllers.js"></script>
    <script src="js/services.js"></script>
    <script src="js/ng-cordova.min.js"></script>
  </head>
  <body ng-app="starter">
    <ion-panel>
      <ion-header-bar class="bar-stable">
        <h1>Ionic Blank Starter</h1>
      </ion-header-bar>
      <ion-content ng-controller="ExampleController">
        <button class="button" ng-click="scanBarcode()">Scan</button>
      </ion-content>
    </ion-panel>

  </body>
</html>

当我按下按钮而不是打开相机时，会返回此错误。

提前致谢。

Answer 1

您需要在cordova.js文件上方包含ng-cordova.min.js文件。

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
    <title></title>

    <link href="lib/ionic/css/ionic.css" rel="stylesheet">
    <link href="css/style.css" rel="stylesheet">

    <!-- IF using Sass (run gulp sass first), then uncomment below and remove the CSS includes above
    <link href="css/ionic.app.css" rel="stylesheet">
    -->

    <!-- ionic/angularjs js -->
    <script src="lib/ionic/js/ionic.bundle.js"></script>

    <!-- cordova script (this will be a 404 during development) -->
    <script src="js/ng-cordova.min.js"></script>
    <script src="cordova.js"></script>

    <!-- your app's js -->
    <script src="js/app.js"></script>
    <script src="js/controllers.js"></script>
    <script src="js/services.js"></script>

  </head>
  <body ng-app="starter">
    <ion-panel>
      <ion-header-bar class="bar-stable">
        <h1>Ionic Blank Starter</h1>
      </ion-header-bar>
      <ion-content ng-controller="ExampleController">
        <button class="button" ng-click="scanBarcode()">Scan</button>
      </ion-content>
    </ion-panel>

  </body>
</html>

Answer 2

您可以通过服务注入使用ngCordova api http://ngcordova.com/docs/plugins/statusbar/ http://ngcordova.com/docs/plugins/keyboard/ 因为我相信你使用的var并不存在。像在控制器中一样，在运行块中注入您使用的服务。

.run(function($ionicPlatform, $cordovaKeyboard, $cordovaStatusbar) {
  $ionicPlatform.ready(function() {
    $cordovaKeyboard.hideKeyboardAccessoryBar(true);
    $cordovaKeyboard.disableScroll(true);
    $cordovaStatusbar.styleDefault();
  });
});

您可以通过$ ionicPlatform.ready（）围绕您的控制器扫描调用，因为您在控制器中写入的内容可以在准备好之前调用扫描低级别函数。

$scope.scanBarcode = function () {
  $ionicPlatform.ready(function() {
    $cordovaBarcodeScanner.scan().then(function (imageData) {
        alert(imageData.text);
    },function (error) {
      console.log(error);
    });
  });
};

ReferenceError：未定义cordova @ ng-cordova.min.js：7

2 个答案: