Does anybody know what does “ Uncaught ReferenceError: analytics is not defined ” mean n why no app user after installation?

Question

I'm using google analytics with my ionic framework app and followed the instruction in https://blog.nraboy.com/2014/06/using-google-analytics-ionicframework/ , I use mobile app preference in google analytics. First I tested it in my device but I got no mobile app user in the analytics overview, instead i got users using windows and mac. And in my browser appears "Uncaught ReferenceError: analytics is not defined". I don't know what I've done wrong...

Here's my code :

.controller('AnalyticsController', function($scope) {
    if(typeof analytics !== undefined) { analytics.trackView("Analytics Controller"); }

    $scope.initEvent = function() {
        if(typeof analytics !== undefined) { analytics.trackEvent("Category", "Action", "Label", 25); }
    }
})

.run(function($ionicPlatform, $ionicPopup) {
    $ionicPlatform.ready(function() {
        if(typeof analytics !== undefined) {
            analytics.startTrackerWithId("UA-xxxx");
        } else {
            console.log("Google Analytics Unavailable");
        }
    });
}); 

Answer 1

It means just that, analytics has not been defined. The reason that your if statements aren't catching it is because typeof undefined returns the string "undefined" not the primitive undefined , so you should do:

.controller('AnalyticsController', function($scope) {
    if(typeof analytics !== 'undefined') { analytics.trackView("Analytics Controller"); }

    $scope.initEvent = function() {
        if(typeof analytics !== 'undefined') { analytics.trackEvent("Category", "Action", "Label", 25); }
    }
})

.run(function($ionicPlatform, $ionicPopup) {
    $ionicPlatform.ready(function() {
        if(typeof analytics !== 'undefined') {
            analytics.startTrackerWithId("UA-xxxx");
        } else {
            console.log("Google Analytics Unavailable");
        }
    });
}); 

Ideally, you should set up a factory to create an injectable analytics service, and not reference things on the global scope.

Answer 2

http://forum.ionicframework.com/t/my-google-analytics-in-my-ionic-app-doesnt-report-any-active-app-user/21073/ <-最适合您的解决方案。