Could not cast value of type 'Charts.BarChartData' (0x109bd1010) to 'Charts.PieChartData' (0x109be0320).

[durul]

Here is my code.

//
// ChartsViewController.swift
// iOSChartsDemo
//

import UIKit
import Charts

class ChartsViewController: UIViewController {

@IBOutlet weak var lineChartView: LineChartView!
@IBOutlet weak var pieChartView: PieChartView!
var months: [String]!

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
    
    months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
    let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 16.0]
    
    setChart(dataPoints: months, values: unitsSold)
    
}

func setChart(dataPoints: [String], values: [Double]) {
    
    
    var dataEntries: [BarChartDataEntry] = []
    var counter = 0.0
    
    for i in 0..<dataPoints.count {
        counter += 1.0
        let dataEntry = BarChartDataEntry(x: values[i], y: counter)
        dataEntries.append(dataEntry)
    }
    
    let chartDataSet = BarChartDataSet(values: dataEntries, label: "Units Sold")
    let chartData = BarChartData()
    chartData.addDataSet(chartDataSet)
    pieChartView.data = chartData
    
    var colors: [UIColor] = []
    
    for _ in 0..<dataPoints.count {
        let red = Double(arc4random_uniform(256))
        let green = Double(arc4random_uniform(256))
        let blue = Double(arc4random_uniform(256))
        
        let color = UIColor(red: CGFloat(red/255), green: CGFloat(green/255), blue: CGFloat(blue/255), alpha: 1)
        colors.append(color)
    }
    
    chartDataSet.colors = colors
    
    
    let lineDataSet = LineChartDataSet(values: dataEntries, label: "Units Sold")
    let lineData = LineChartData()
    lineData.addDataSet(lineDataSet)
    lineChartView.data = lineData
    
}

}