为什么Google Analytics（分析）事件不触发/保存？

Question

I've got a google analytics tracker loaded into an iFrame:

  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
    (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
    m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

  ga('create', 'UA-my-id-here');
  ga('set', 'location', 'http://foo.com/bar');
  ga('set', 'title', 'Awesome');

  ga('send', 'pageview');

I've also got custom Javascript trying to track events in a rich-client application on the same page, which has a reference to the ga instance above, and tries to send an event:

ga('send', 'event', 'my_category', 'my_event', 'my_value');

When I load the page I see the initial pageview tracked properly. When I click and fire off the custom event tracking, the JavaScript executes and does not throw an error. It also does not register any event.

Answer 1

确保您要在网页摘要之后尝试调用的页面已加载analytics.js（如果位于iframe中）

ga('send', 'event', 'my_category', 'my_event', 'my_value');

Answer 2

The problem ended up being an issue of JavaScript scoping.

The analytics.js application only works when all calls are appropriately within the same Javascript scope. I was trying to fire a GA event within a different page scope (due to an embedded JS app and iFrames, it's complicated).

The solution was the following:

<script type="text/javascript">
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
    (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
    m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

  ga('create', 'UA-my-id');
  ga('set', 'hostname', 'awesome.com');
  ga('set', 'location', '/path/to/awesome');
  ga('set', 'referrer', 'REFERRER_VALUE');
  ga('set', 'title', 'Awesome App');

  ga('send', 'pageview');

  window.trackGAEvent = function(eventName, value) {
    ga('send', 'event', 'awesome_app', eventName, value);
  }
</script>

The trick was encapsulating the ga event send call. I can call this method from other contexts by drilling down the DOM, but I can't call the GA app directly from outside the proper context.