iOS Charts not showing all xAxis Value - ios

Question

I am writing an iOS App in Swift 4.2
I am using Charts library to display Horizontal Bar Chart. I need to set its xAxis Values. Only last value is being displayed.
Issue Screenshot:
Code Snippet:
#IBOutlet var chartView: HorizontalBarChartView!
override func viewDidLoad() {
super.viewDidLoad()
let xAxis = chartView.xAxis
xAxis.labelPosition = .bottom
xAxis.labelFont = .systemFont(ofSize: 10)
xAxis.drawAxisLineEnabled = false
xAxis.drawGridLinesEnabled = false
xAxis.granularity = 1
xAxis.enabled=true
xAxis.setLabelCount(3, force: false) //Not working as per expectations
xAxis.valueFormatter=IndexAxisValueFormatter(values: ["A","B","C"]) //Not working as per expectations
self.setDataCount(3,values:[142000,122400,100110])
chartView.animate(yAxisDuration: 2.5)
}
func setDataCount(_ count: Int, values:[Double]) {
let barWidth = 2.0
let spaceForBar = 4.0
var n=0
let yVals = (0..<count).map { (i) -> BarChartDataEntry in
let val = values[n]
n+=1
return BarChartDataEntry(x: Double(i)*spaceForBar, y: val)
}
let set1 = BarChartDataSet(entries: yVals, label: "DataSet")
set1.drawIconsEnabled = false
let data = BarChartData(dataSet: set1)
data.setValueFont(UIFont(name:"HelveticaNeue-Light", size:10)!)
data.barWidth = barWidth
chartView.data = data
//let xAxis = chartView.xAxis
//xAxis.setLabelCount(3, force: false)
//xAxis.valueFormatter=IndexAxisValueFormatter(values: ["A","B","C"])
}
I tried to find solutions:
xAxis.valueFormatter=IndexAxisValueFormatter(values: ["A","B","C"])
but these are not working.

Answer 1

This is happening because the default functionality of IndexAxisValueFormatter
You have to code your own custom IAxisValueFormatter like this
final class CustomFormatter: IAxisValueFormatter {
var labels: [String] = []
func stringForValue(_ value: Double, axis: AxisBase?) -> String {
let count = self.labels.count
guard let axis = axis, count > 0 else {
return ""
}
let factor = axis.axisMaximum / Double(count)
let index = Int((value / factor).rounded())
if index >= 0 && index < count {
return self.labels[index]
}
return ""
}
}
Then use it like
let customFormater = CustomFormater()
customFormater.labels = ["A","B","C"]
chartView.xAxis.valueFormatter = customFormater
Make sure the size/count of the data and labels is the same or it wont give you the desired results.

Answer 2

I updated your given code please check changes.
I hope its work for you.
class ViewController: UIViewController {
#IBOutlet var chartView: HorizontalBarChartView!
override func viewDidLoad() {
super.viewDidLoad()
let xAxis = chartView.xAxis
xAxis.labelPosition = .bottom
xAxis.labelFont = .systemFont(ofSize: 10)
xAxis.drawAxisLineEnabled = false
xAxis.drawGridLinesEnabled = false
xAxis.granularity = 1
xAxis.enabled=true
xAxis.setLabelCount(3, force: false) //Not working as per expectations
xAxis.valueFormatter = IndexAxisValueFormatter(values: ["A","B","C"])//AxisValueFormatter(values: ["A","B","C"]) //Not working as per expectations
self.setDataCount(3,values:[142000,122400,100110])
chartView.animate(yAxisDuration: 2.5)
}
func setDataCount(_ count: Int, values:[Double]) {
let yVals = (0..<count).map { (i) -> BarChartDataEntry in
let val = values[i]
return BarChartDataEntry(x: Double(i), y: val)
}
let set1 = BarChartDataSet(values: yVals, label: "DataSet")
set1.drawIconsEnabled = false
let data = BarChartData(dataSet: set1)
data.setValueFont(UIFont(name:"HelveticaNeue-Light", size:10)!)
//data.barWidth = barWidth
chartView.data = data
//let xAxis = chartView.xAxis
//xAxis.setLabelCount(3, force: false)
//xAxis.valueFormatter=IndexAxisValueFormatter(values: ["A","B","C"])
}
}