StackedBarChart isn't stacking bars

[rossmooney]

I'm trying to create a stacked bar chart, but the bars won't stack. I just get alternating colors for adjacent bars, and the values are summed from the array passed into it. I pass in an array of x values (indexes) and an array of y value arrays as items. A coworker ran into the same issue on the Android platform, but I don't see this issue mentioned anywhere else so maybe we aren't setting something correctly?

        //Get x values and y value arrays
 		guard let chart = chart as? BarChartView,
            case .stackedY(let yValues) = data.yValues,
        case .index(let xValues, _) = data.xValues else { return }

        //Create entries
        let entries = yValues.enumerated().map { index, items in
            BarChartDataEntry(x: Double(xValues[index]), yValues: items)
        }
                
        //Build set
        let set = BarChartDataSet(values: [], label: config.title)
        set.setColors(self.chartColors, alpha: 1.0)
        set.drawValuesEnabled = false

        //Update with entries
        entries.forEach { entry in _ = set.addEntry(entry) }
        barChartData?.dataSets[0] = set
        
        //Labels and legends
        set.stackLabels = ["Source1", "Source2"]
        chart.legend.enabled = !set.stackLabels.isEmpty
        chart.legend.xEntrySpace = chartWidth / 4
        chart.legend.xOffset = 20
        chart.legend.form = .circle

        //Update data on chart
        barChartData.barWidth = 0.5
        chart.data = barChartData

[liuxuan30]

check out ChartDemo; you don't setup correctly. The stacked y values should be in an array.
e.g.

    for (int i = 0; i < count; i++)
    {
        double mult = (range + 1);
        double val1 = (double) (arc4random_uniform(mult) + mult / 3);
        double val2 = (double) (arc4random_uniform(mult) + mult / 3);
        double val3 = (double) (arc4random_uniform(mult) + mult / 3);
        
        [yVals addObject:[[BarChartDataEntry alloc] initWithX:i yValues:@[@(val1), @(val2), @(val3)] icon: [UIImage imageNamed:@"icon"]]];
    }

[rossmooney]

Thanks for your response, but I am using an array of y-values for each entry.

Turns out my issue was that I was not using the initializer of BarChartDataSet to pass in the values. The stack size is only calculated there, which is a requirement for bar chart stacking to work.

[liuxuan30]

all I see. I don't realize this. Sorry