ion-select-custom.ts

 public showSelectPopup(carInfo : CarInfo) {
    let alert = this.alertCtrl.create();
    alert.setTitle(carInfo.selectOptions.title);
    carInfo.values.forEach(element => {
      alert.addInput({type: 'radio', label: element, value: element});
    });
    alert.addButton('CANCEL');
    alert.addButton({
      text: 'OK',
      handler: data => {
        alert.dismiss();
        carInfo.value = data;
        return false;
      }
    });
    alert.present();
  }