Is it possible to handle tap events on a column of BarChart?

Question

I know that on MPAndroidChart is possible to handle events on the charts. On its documentation are all well documented.

Nevertheless I am not able to find any documentation about the same events on ios-chart. I know that its creator tells that we should follow the documentaiton of MPAndroidChart for his library also but I am not able to handle that events on Swift 3.0.

I also could not find any examples handle these events for ios-chart library.

so, Is it possible to handle tap event on ios-chart library?

EDIT: According to the feedback of @AdamM I am going to put here the function in which I set the data to the chart.

func enterData(valuesChart: [BarChartDataEntry]){
    let chartDataSet = BarChartDataSet(values: valuesChart, label: "Total Values")

    let charData = BarChartData(dataSets: [chartDataSet])
    barChartView?.data = charData
    barChartView?.animate(xAxisDuration: 2.0, yAxisDuration: 2.0)
}

Thanks in advance!

Answer 1

Yeah, this functionality is built in to the charting library. Make sure your class conforms to the ChartViewDelegate protocol.

Edit full code sample

import UIKit
import Charts

@objc(BarChartFormatter)
public class BarChartFormatter: NSObject, IAxisValueFormatter
{
    var months: [String]! = ["Jan", "Feb", "Mar"]
    public func stringForValue(_ value: Double, axis: AxisBase?) -> String {

        return months[Int(value)]
    }
}


class ViewController: UIViewController,ChartViewDelegate
{
    @IBOutlet var barChart : BarChartView!
     let dataArray = ["Jan", "Feb", "Mar"]
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        self.title = "Testing"

        let values = [5.2,10.5,15.3]
        setBarChart(values: values)
        barChart.delegate = self
    }

    //MARK: Chart delegate methods
    func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {

        let pos = NSInteger(entry.x)
        print(dataArray[pos])
    }

    func chartValueNothingSelected(_ chartView: ChartViewBase)
    {

    }
    //MARK: Set chart
    func setBarChart(values: [Double])
    {
        var dataEntries: [BarChartDataEntry] = []

        for i in 0..<values.count {
            let dataEntry = BarChartDataEntry(x: Double(i), y: values[i])

            dataEntries.append(dataEntry)
        }
        let dataSet = BarChartDataSet(values: dataEntries, label: "")
        var dataSets : [IChartDataSet] = [IChartDataSet]()
        dataSets.append(dataSet)

        let format:BarChartFormatter = BarChartFormatter()
        let xAxis = barChart.xAxis
        xAxis.granularity = 1.0
        xAxis.labelPosition = .bottom
        xAxis.valueFormatter = format


        let chartData = BarChartData(dataSets: dataSets)
        barChart?.data = chartData

    }
}