Pie chart using Charts library with swift

Question

I am integrating pie chart in my app using Charts library and getting issue with chart data my code is

import UIKit
import Charts

class ViewController: UIViewController {

  @IBOutlet weak var pieChartView: PieChartView!

  override func viewDidLoad() {
    super.viewDidLoad()
    let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
    let unitsSold = [10.0, 4.0, 6.0, 3.0, 12.0, 16.0]
    setChart(dataPoints: months, values: unitsSold)
  }

  func setChart(dataPoints: [String], values: [Double]) {
    var dataEntries: [ChartDataEntry] = []
    for i in 0..<dataPoints.count {
      let dataEntry1 = ChartDataEntry(x: Double(i), y: values[i], data: dataPoints[i] as AnyObject)
      dataEntries.append(dataEntry1)
    }
    print(dataEntries[0].data)
    let pieChartDataSet = PieChartDataSet(values: dataEntries, label: "Units Sold")
    let pieChartData = PieChartData(dataSet: pieChartDataSet)
    pieChartView.data = pieChartData
    
    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)
    }
    pieChartDataSet.colors = colors
  }
}

and when run app I getting something this

but I need pie chart in full data records like in below screen shot

both are same ? and ya if you want to print month name with your valye in chart then just add it with your value means append your text value when its go to build chart — Himanshu Moradiya
I have already append text value initialise time in this line: let dataEntry1 = ChartDataEntry(x: Double(i), y: values[i], data: dataPoints[i] as AnyObject) — Raj Joshi
Using code from appcoda: appcoda.com/ios-charts-api-tutorial — Raj Joshi
@Himanshu, I have print data and getting corresponding values. — Raj Joshi

Raj Joshi Raj Joshi · Accepted Answer · 2017-03-18T07:33:05

Update for this question.

  func updateChartData()  {

    let chart = PieChartView(frame: self.view.frame)
    // 2. generate chart data entries
    let track = ["Income", "Expense", "Wallet", "Bank"]
    let money = [650, 456.13, 78.67, 856.52]

    var entries = [PieChartDataEntry]()
    for (index, value) in money.enumerated() {
        let entry = PieChartDataEntry()
        entry.y = value
        entry.label = track[index]
        entries.append( entry)
    }

    // 3. chart setup
    let set = PieChartDataSet( values: entries, label: "Pie Chart")
    // this is custom extension method. Download the code for more details.
    var colors: [UIColor] = []

    for _ in 0..<money.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)
    }
    set.colors = colors
    let data = PieChartData(dataSet: set)
    chart.data = data
    chart.noDataText = "No data available"
    // user interaction
    chart.isUserInteractionEnabled = true

    let d = Description()
    d.text = "iOSCharts.io"
    chart.chartDescription = d
    chart.centerText = "Pie Chart"
    chart.holeRadiusPercent = 0.2
    chart.transparentCircleColor = UIColor.clear
    self.view.addSubview(chart)

}

Pie chart using Charts library with swift

2 Answers