This API sets series labels that are shown in the chart legend area.
-(void)setSeriesLabels:(NSArray*)labels;
-(void)barChartExample { chartView.chart.chartType = BLAChart; chartView.chart.title.text = @"Bar Chart"; iddata = chartView.chart.dataManager; data.useSampleData = NO; NSArray* columnNames = [NSArray arrayWithObjects:@"1942", @"1943", @"1944", nil]; int columnCount = [columnNames count]; [data setGroupLabels:columnNames]; [data setDataPointCount:columnCount]; NSArray* rowNames = [NSArray arrayWithObjects:@"Ships", @"Planes", nil]; [data setSeriesLabels:rowNames]; }