can't set the XVals

[fonglaaaam]

int xVals_count = 12;//X轴上要显示多少条数据
double maxYVal = 100;//Y轴的最大值
//X轴上面需要显示的数据
NSMutableArray *xVals = [[NSMutableArray alloc] init];
for (int i = 0; i < xVals_count; i++) {
[xVals addObject:[NSString stringWithFormat:@"%dmonth", i+1]];
}
.........
BarChartData *data = [[BarChartData alloc] initWithXVals:xVals dataSets:dataSets];

this is old way toast xvals,
but now i can't find de method to set the xvals.
(
the method above replaced by :
BarChartData *data = [[BarChartData alloc] initWithDataSets:dataSets];
)

[fonglaaaam]

figure out

NSArray *xVals = @[@"asd",@"qwe",@"zxc",@"wsad"];
{
self.LineChartView.xAxis.valueFormatter = self;//x轴代理 (delegate)
}

#pragma mark valueFormatte delegate

• (NSString *)stringForValue:(double)value axis:(ChartAxisBase *)axis{
  return xVals[(int)value % xVals.count];
  }