How to show all labels in xAxis ?

[Charlotte3240]

    let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
    let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 3.0]
    let unitsSold2 = [10.0, 3.0, 5.0, 2.0, 2.0, 1.0]

    var combineChartView = BarChartView()

        combineChartView.chartDescription?.enabled = false
        combineChartView.scaleYEnabled = false
        combineChartView.scaleXEnabled = false
        combineChartView.noDataText = "暂时没有任何数据"
        
        let xAxis = combineChartView.xAxis
        xAxis.labelPosition = .bottom
        xAxis.drawGridLinesEnabled = false
        xAxis.drawAxisLineEnabled = true
        xAxis.valueFormatter = IndexAxisValueFormatter(values: months)
        xAxis.forceLabelsEnabled = true
        xAxis.granularity = 1
        xAxis.granularityEnabled = true
        xAxis.labelTextColor = UIColor.black
        
        
        combineChartView.rightAxis.enabled = false
        let yAxis = combineChartView.leftAxis
        yAxis.drawGridLinesEnabled = true
        
        var entrys : [BarChartDataEntry] = []
        

        for i in 0..<unitsSold.count {
            let entry = BarChartDataEntry(x: Double(i), y: Double(unitsSold[i]))
            entrys.append(entry)
        }
        
        let set1 = BarChartDataSet(values: entrys, label: "老顾客")
        set1.colors = [UIColor.yellow]
        set1.drawValuesEnabled = false

        entrys = []
        for i in 0..<unitsSold2.count {
            let entry = BarChartDataEntry(x: Double(i), y: Double(unitsSold2[i]))
            entrys.append(entry)
        }
        
        let set2 = BarChartDataSet(values: entrys, label: "新顾客")
        set2.colors = [UIColor.red]
        set2.drawValuesEnabled = false
        
        
        
        let chartData = BarChartData(dataSets: [set1,set2])
        
        combineChartView.xAxis.axisMinimum = chartData.xMin - 1.0
        combineChartView.xAxis.axisMaximum = chartData.xMax + 1.0

        
        
        combineChartView.data = chartData

[Charlotte3240]

I think Writing like this ，it's will work. Is there any more attention?

        xAxis.valueFormatter = IndexAxisValueFormatter(values: months)
        xAxis.forceLabelsEnabled = true
        xAxis.granularity = 1
        xAxis.granularityEnabled = true

[Charlotte3240]

NOW ，i change this file "IndexAxisValueFormatter.swift"
it works

    open func stringForValue(_ value: Double,
                             axis: AxisBase?) -> String
    {
        let index = Int(value.rounded())
        guard index>=0, index <= _values.count-1 else {
            return ""
        }
        print(_values[index])

        return _values[index]
    }