Cómo agregar la UI-Scroll con datos remotos en AngularJS

$scope.list= function () {
    $scope.isDataLoaded= false;
    $http.get(requestURL).then(function (response) {
        $scope.isDataLoaded= true
    ...
})

<ul ng-if="isDataLoaded" class="viewport" ui-scroll-viewport>
    <li ui-scroll="item in datasource" adapter="adapter" buffer-size="5">
        <span class="title">{{item}}</span>
    </li>
</ul>
SAMER SAEID