Strange change of page on success function

1

I’ve page (app.photo) of user profile where is possible upload and see photo uploaded.
When the photo are displayed if you click i’s possible to delete calling “delPhoto” function:

$scope.delPhoto = function(IDphoto,name) {
	$ionicLoading.show({template: 'Elimino la foto...', duration:500});
	$http.post('http://www.digitalxp.it/public/speedjob/del_img.asp?nome='+name, {ID_PHOTO:IDphoto, nome:name}).success(function(){viewPicture}).error(function(){alert("Foto non eliminata!")});
	return false
	}

function viewPicture() {
	$ionicLoading.show({template: 'Sto cercando le tue foto...'});
    $scope.photos = null;
	getPhoto.getData(function(dataResponse) {
    $scope.photos = dataResponse;
	});
	$ionicLoading.hide();
}

All works great (the img selected it’s deleted from the server) but on success function I would call viewPicture function (to refresh photo remaining on the server) but don’t work, and the page automatically changed on mainpage!
I try to add $state.go(“app.photo”) on success, but when execute the script go before on app.welcome page and then on app.photo! What wrong???