$scope.events = [];
$scope.$on('$ionicView.afterEnter', function(){
    $scope.firstRefresh();
});

$scope.firstRefresh = function(){
    $scope.showFirstRefresh = true;
    $timeout(function(){
        Evento.get()
            .then(function(result){
                $scope.events = result;
                $ionicSlideBoxDelegate.update();
                    console.log($ionicSlideBoxDelegate.currentIndex); <--- HERE
            }, function(err){

            })
            .finally(function(){
                $scope.showFirstRefresh = false;
            });
    }, 1000);
};

  function caller() {
      var handle = this.handle;
      var args = arguments;
      var foundInstancesCount = 0;
      var returnValue;

      this._instances.forEach(function(instance) {
        if ((!handle || handle == instance.$$delegateHandle) && instance.$$filterFn(instance)) {
          foundInstancesCount++;
          var ret = instance[methodName].apply(instance, args);
          //Only return the value from the first call
          if (foundInstancesCount === 1) {
            returnValue = ret;
          }
        }
      });

      if (!foundInstancesCount && handle) {
        return $log.warn(
          'Delegate for handle "' + handle + '" could not find a ' +
          'corresponding element with delegate-handle="' + handle + '"! ' +
          methodName + '() was not called!\n' +
          'Possible cause: If you are calling ' + methodName + '() immediately, and ' +
          'your element with delegate-handle="' + handle + '" is a child of your ' +
          'controller, then your element may not be compiled yet. Put a $timeout ' +
          'around your call to ' + methodName + '() and try again.'
        );
      }
      return returnValue;
    }</span>