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You can easily manipulate the ColumnSeries sample app to make a bar chart by following these steps:
1) Swap the X-Axis and Y-Axis around, so the SChartCategoryAxis is assigned to the chart's Y-Axis and the SChartNumberAxis is assigned to the chart's X-Axis.
2) Replace SChartColumnSeries with an SChartBarSeries in the SChartDatasource method "sChart:seriesAtIndex:".
3) Swap the SChartDatapoint's xValue and yValue around in the SChartDatasource method "sChart:dataPointAtIndex:forSeriesAtIndex:". So the NSString "key" variable is assigned to the yValue and the value from the "_sales" array is assigned to the xValue.
This should now draw you a bar chart.
Let me know if you have any questions.