Bar Chart Demo One Label One Color

[c-ys]

  In the Bar Chart Demo, I want to do that like one barColor represents one company.
  So I put it only one color in every dataSet.
  The result is shown in the figure, the Colors describe is achieved.
  But the barColors are all the same.Could you help me to solve it? What can I do for it?Thx.

that is my function "- (void)setDataCount:(int)count range:(double)range" in the file "BarChartViewController.m" .

NSMutableArray *yVals = [[NSMutableArray alloc] init];
 double start = 1.0;
for (int i = start; i < start + count + 1; i++)
{
    double mult = (range + 1);
    double val = (double) (arc4random_uniform(mult));
    if (arc4random_uniform(100) < 25) {
        [yVals addObject:[[BarChartDataEntry alloc] initWithX:i y:val icon: [UIImage imageNamed:@"icon"]]];
    } else {
        [yVals addObject:[[BarChartDataEntry alloc] initWithX:i y:val]];
    }
}

BarChartDataSet *set1 = nil;
if (_chartView.data.dataSetCount > 0)
{
    set1 = (BarChartDataSet *)_chartView.data.dataSets[0];
    set1.values = yVals;
    [_chartView.data notifyDataChanged];
    [_chartView notifyDataSetChanged];
}
else
{


    NSMutableArray *dataSets = [[NSMutableArray alloc] init];

    for (int b = 0 ; b<4; b++) {
        BarChartDataSet *set = [[BarChartDataSet alloc] initWithValues:yVals label:[NSString stringWithFormat:@"company-%d",b+1]];
        NSArray *arr = [NSArray arrayWithObject:ChartColorTemplates.material[(b +1)%4]];
        [set setColors:arr];
        set.drawIconsEnabled = NO;
        [dataSets addObject:set];
    }
    
    BarChartData *data = [[BarChartData alloc] initWithDataSets:dataSets];
    [data setValueFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:10.f]];
    
    data.barWidth = 0.9f;
    
    _chartView.data = data;
}