问如何在提交时生成离子弹出错误消息

EN

<div class="item item-text-wrap">
                        Response: <b ng-bind="response"></b>
                    </div>

$http.post(link, {
          inputName : $scope.data.inputName

        }).then(function (res){
           $scope.response = res.data;
        });

// An alert dialog
 $scope.showAlert = function() {
   var alertPopup = $ionicPopup.alert({
     title: 'Don\'t eat that!',
     template: 'It might taste good'
   });

   alertPopup.then(function(res) {
     console.log('Thank you for not eating my delicious ice cream cone');
   });
 };