Ionic Google Analytics Track Category

Question

I can track my web campaigns without problem like:

ga('set', 'campaignSource', 'WebApp');
ga('set', 'campaignMedium', 'WebApp'); 

But in Ionic when I integrate like below, I can see as active user but I could not see campaign name.

    this.ga.startTrackerWithId(this.singleton.googleAnalyticsTrackId)
   .then(() => {
     console.log('Google analytics is ready now');
        this.ga.trackView('mobile');
        this.ga.setVar('campaignMedium','mobile').then(d=>console.log(d));
        this.ga.setVar('campaignSource','mobile').then(d=>console.log(d));
   })
   .catch(e => console.log('Error starting GoogleAnalytics', e));

Is there any suggestion or solution?