这是我的代码:CPTXYPlotSpace*barGraphPlotSpace=[[CPTXYPlotSpacealloc]init];barGraphPlotSpace.yRange=[CPTPlotRangeplotRangeWithLocation:CPTDecimalFromFloat(0.0)length:CPDecimalFromFloat(100.0)];CPTXYAxis*rightY=[[CPTXYAxisalloc]init];rightY.coordinate=CPTCoordinateY;rightY.orthogonalCoordinateDecimal=CP