我使用的图表框架的绘制图表。我需要在每个栏的左侧添加一些字符串。在我的代码中，
总是有两个小节，一个是收入，一个是支出。我想在每个酒吧旁边显示这些字符串。

在下面可以看到我的代码：

            let ys1 = [model.totalIncome, abs(model.totalExpense)]

            var yse1 = ys1.enumerated().map { x, y -> BarChartDataEntry in
            return BarChartDataEntry(x: Double(x), y: y)
            }

            let count = 2
            let data = BarChartData()
            let ds1 = BarChartDataSet(values: yse1, label: "")
            ds1.colors = [UIColor.red, UIColor.blue]

            // Number formatting of Values
            ds1.valueFormatter = YAxisValueFormatter()
            ds1.valueFont = UIFont(fontType: .H6)!
            ds1.valueTextColor = UIColor.dark_text

            // Data set
            data.addDataSet(ds1)
            horizontalBarChartView.data = data

            // General setting
            horizontalBarChartView.xAxis.drawLabelsEnabled = false
            horizontalBarChartView.setScaleEnabled(false)

            // Grid
            horizontalBarChartView.xAxis.drawGridLinesEnabled = false
            horizontalBarChartView.leftAxis.gridLineDashLengths = [15.0, 15.0]
            horizontalBarChartView.leftAxis.gridColor = UIColor.palette_28
            horizontalBarChartView.rightAxis.drawGridLinesEnabled = false


            // Disable number formatting of leftAxis and rightAxis
            horizontalBarChartView.leftAxis.enabled = false
            horizontalBarChartView.rightAxis.enabled = false

            horizontalBarChartView.xAxis.valueFormatter = 
            IndexAxisValueFormatter(values: ["Income","Expense"])
            horizontalBarChartView.xAxis.granularityEnabled = true
            horizontalBarChartView.xAxis.granularity = 1


            // setViewPortOffsets
            let digitCount = Int(data.yMax).digitCount
            let leftOffcet: CGFloat = digitCount > 2 ? CGFloat((digitCount - 1) * 10) : 10.0
            horizontalBarChartView.setViewPortOffsets(left: leftOffcet, top: 0, right: 0, bottom: 50)

            horizontalBarChartView.leftAxis.axisMinimum = 0

And my view:

   lazy var horizontalBarChartView: HorizontalBarChartView = {
        let chartView = HorizontalBarChartView()
        chartView.contentMode = .scaleAspectFit
        chartView.drawBordersEnabled = false
        chartView.drawGridBackgroundEnabled = false
        chartView.gridBackgroundColor = UIColor.clear
        chartView.legend.enabled = false
        chartView.chartDescription = nil
        chartView.highlighter = nil
        chartView.clipsToBounds = true
        chartView.translatesAutoresizingMaskIntoConstraints = false
        return chartView
    }()

I guess below code should add these labels, however, it is not working

    horizontalBarChartView.xAxis.valueFormatter = IndexAxisValueFormatter(values: ["Income","Expense"])
    horizontalBarChartView.xAxis.granularityEnabled = true
    horizontalBarChartView.xAxis.granularity = 1

Update

See orange rectangle. I need these labels.