infinitescroll.ts

  getTransportations() {
    let loader = this.loadingController.create({
      content: 'Getting data...'
    });
    loader.present();   
    return this.wpApi.getTransportations(this.maxResults)
      .then( (data) => {
        if ( data.status == 200 ) {
          this.transportantions = data.response.entries;
        } else {
          console.log('Something was wrong. Error status ' + data.status);
        }
        loader.dismiss(); 
      })
      .catch(function (err) {
        loader.dismiss(); 
        console.log('something was wrong: ' + err);
      });
  }

   doInfinite(infiniteScroll:any) {
     this.maxResults += 10;
     
     this.getTransportations().then(()=>{
       infiniteScroll.complete();
     });
     
  }