How to add values to this iOS Bar Chart in White and 14px using Swift? - ios

Question

I have a bar chart which currently looks like this:
I would like to put the value of each bar at the end of the bar in white.
This is my current code:
viewDidLoad{
self.results = ["Lost", "Drawn", "Won"]
let games = [total_Losses, total_Draws, total_Wins]
self.setChart(dataPoints: self.results, values: games)
}
func setChart(dataPoints: [String], values: [Double]){
let formato:BarChartFormatter = BarChartFormatter()
let xaxis:XAxis = XAxis()
let xAxis : XAxis = self.barChartView.xAxis;
barChartView.noDataText = "you need to provide some data for the chart."
var dataEntries: [BarChartDataEntry] = Array()
for i in 0..<dataPoints.count {
let dataEntry = BarChartDataEntry(x: Double(i), y: values[i])
dataEntries.append(dataEntry)
formato.stringForValue (Double(i), axis: xaxis)
}
xaxis.valueFormatter = formato
barChartView.xAxis.valueFormatter = xaxis.valueFormatter
xAxis.labelFont = UIFont(name: "Avenir", size: 14.0)!
xAxis.labelTextColor = UIColor.white
let chartDataSet = BarChartDataSet(values: dataEntries, label: "Games Played")
let chartData = BarChartData(dataSets: [chartDataSet])
chartDataSet.colors = ChartColorTemplates.material()
barChartView.leftAxis.enabled = true
barChartView.legend.enabled = false
barChartView.chartDescription?.text = ""
chartData.addDataSet(chartDataSet)
barChartView.data = chartData
barChartView.leftAxis.forceLabelsEnabled = true
barChartView.rightAxis.forceLabelsEnabled = true
barChartView.xAxis.granularityEnabled = true
barChartView.xAxis.granularity = 1.0
barChartView.leftAxis.drawGridLinesEnabled = false
barChartView.rightAxis.drawGridLinesEnabled = false
barChartView.xAxis.drawGridLinesEnabled = false
barChartView.rightAxis.enabled = false
barChartView.drawGridBackgroundEnabled = false
self.barChartView.xAxis.labelPosition = XAxis.LabelPosition.bottom
}
How do I add values to the bars in this chart, in white and pixel size 14?
The answers so far have failed to work - I think the problem may lie within:
for i in 0..<dataPoints.count {
let dataEntry = BarChartDataEntry(x: Double(i), y: values[i])
dataEntries.append(dataEntry)
formato.stringForValue (Double(i), axis: xaxis) // This line has a warning: "Result of call to 'stringForValue(_:axis:)' is unused
}
This above snippet of code calls this class below:
public class BarChartFormatter: NSObject, IAxisValueFormatter
{
var matches: [String]! = ["Lost", "Drawn", "Won"]
public func stringForValue(_ value: Double, axis: AxisBase?) -> String
{
return matches[Int(value)]
}
}

Answer 1

You can set the color and fonts using the BarChartData class object. For your case, it is chartData
Follow below code in order to set the required fonts and color of labels.
chartData.setValueFont(UIFont.systemFont(ofSize: 14.0))
chartData.setValueTextColor(UIColor.white)
In case you want to show the label within the bar then set your BarChartView object property drawValueAboveBarEnabled to false. It will render your labels within the bars.
barChartView.drawValueAboveBarEnabled = false