相关疑难解决方法(0)

当我尝试这样做时,我收到以下错误

var fbcanvas = $('#fbcanvas');

这是我得到的错误

ReferenceError:$未定义

这是我的JS代码

var feedbackModule = angular.module('feedbackModule', [ 'ui.bootstrap', 'dialogs' ]);

feedbackModule.controller('feedbackDialog', function($scope, $rootScope, $timeout, $dialogs) {
$scope.confirmed = 'You have yet to be confirmed!';
$scope.name = '"Your name here."';

$scope.sendFeedback = function() {

html2canvas(document.body, {
    onrendered: function(canvas) {
    var data = canvas.toDataURL('image/png'), dlg = null;

    dlg = $dialogs.create('js/plugin/vzfeedbacktool.html', 'feedbackToolController', {
        imgdata: data
    }, {
        key: false,
        back: 'static'
    });
    dlg.result.then(function(name) {
        $scope.name = name;
    }, function() {
        $scope.name = 'You decided not to enter …

我有3个执行类似任务的控制器：

• PastController向API查询过去的系统中断。
• CurrentController向API查询当前系统中断
• FutureController向API查询将来的系统中断

它们每个都是唯一的（尽管它们具有相似的功能）。但是，它们都从定义相同的$scope变量开始：

app.controller("PastController", function ($scope) {
   $scope.Outages = "";
   $scope.loading = 0;
   $scope.nothing = 0;
   $scope.error = 0;
   //--- code continues ---//
});

app.controller("CurrentController", function ($scope) {
   $scope.Outages = "";
   $scope.loading = 0;
   $scope.nothing = 0;
   $scope.error = 0;
   //--- code continues ---//
});

app.controller("FutureController", function ($scope) {
   $scope.Outages = "";
   $scope.loading = 0;
   $scope.nothing = 0;
   $scope.error = 0;
   //--- code continues ---//
});

我可以使用服务或工厂在一个地方初始化这些变量，而不用重复代码吗？