A chart loaded with an empty dataset via IGSeriesDataSourceHelper displays an empty chart as perfect as I need it.  However, it seems that an empty dataset via IGAsyncCategoryDataSourceHelper just spins emptily waiting for data.  Moreover, this causes problems with code as such:

 [self.chartView insertItemAtIndex:index withSource:helper];   //<-- EXCEPTION THROWN

The currentSeries.dataPoints.count is zero (nil behind the scenes?), so when I try to add anything to it I get...

[CoreDataTVC controller:didChangeObject:atIndexPath:forChangeType:newIndexPath:] - update (delete and insert)*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'

I had a similar problem in the past, and it was resolved with the following logic.  I think there is a deeper problem with the async data source handling an empty dataset.

-(void)dataInsertedAtIndex:(NSInteger)index fetchedResults:(NSArray*)fetchedResults

{

    for(id helperKey in self.dataSourceHelperDict)

    {        

        IGAsyncCategoryDataSourceHelper *helper = self.dataSourceHelperDict[helperKey];

        helper.data = fetchedResults;

        BOOL indexOutOfRange = NO;

        for (IGSeries *currentSeries in _chartView.series)

        {

            if ([currentSeries.dataSource isEqual:helper] && currentSeries.dataPoints.count <= index="" p="">

            {

                currentSeries.dataSource = helper;

                if(currentSeries.dataPoints.count <= index="" p="">

                {

                    indexOutOfRange = YES;

                }

            }

        }

        if(!indexOutOfRange)   // If this check is removed...

            [self.chartView insertItemAtIndex:index withSource:helper]; //<-- EXCEPTION THROWN

    }

}