Prevent angular-ui ui-scroll from loading in hidden div

You can try to manage it through the datasource implementation:

$scope.datasource.get = function(index, count, success) {
  // prevent data getting while ui-scroll is invisible
  if (!$scope.isScrollerVisible) {
    return; // or let him request for 1 pack and prevent others, any logic
  }
  // get required data and pass it into success callback
  var result = [];
  for (var i = index; i <= index + count - 1; i++) {
    result.push({text: "item #" + i});
  }
  success(result);
}

Also you probably need to initiate scroll reloading once (adapter doc):

$scope.$watch('isScrollerVisible', function(value) {
  if(value) {
    $scope.datasourceAdapter.reload()
  }
});