Wie man ein Tortendiagramm mit Research Kit

Question

Hallo bin ich neu zu schnell und ich habe versucht, ein Kreisdiagramm mit Research Kit App zu bauen.

ich schreibe einige Code anhand dieser link

Wenn mein Code ausführen es zeigt Fehler ‚Typ‚Viewcontroller‘entspricht nicht Protokoll‚ORK PieChartView Datasource‘‘

bitte vorschlagen, wie diese zu lösen Problem.

hier ist mein Code:

import UIKit 
    import ResearchKit 

    class ViewController: UIViewController,ORKPieChartViewDataSource { 


     @IBOutlet weak var pieChartView: ORKPieChartView! 
     var colors : NSArray! 

     override func viewDidLoad() { 
      super.viewDidLoad() 

       colors = [ 
       UIColor(red: 217/225, green: 217/255, blue: 217/225, alpha: 1), 
       UIColor(red: 142/255, green: 142/255, blue: 147/255, alpha: 1), 
       UIColor(red: 244/255, green: 200/255, blue: 74/255, alpha: 1) 
      ] 

      // Connect the pie chart object to a data source 
      pieChartView.dataSource = pieChartDataSource 

      // Optional custom configuration 
      pieChartView.showsTitleAboveChart = false 
      pieChartView.showsPercentageLabels = true 
      pieChartView.drawsClockwise = true 
      pieChartView.titleColor = UIColor.purple 
      pieChartView.textColor = UIColor.purple 
      pieChartView.title = "Weekly" 
      pieChartView.text = "Report" 
      pieChartView.lineWidth = 10 
      pieChartView.showsPercentageLabels = true 

     } 

     override func didReceiveMemoryWarning() { 
      super.didReceiveMemoryWarning() 
      // Dispose of any resources that can be recreated. 
     } 

     func numberOfSegmentsInPieChartView(pieChartView: ORKPieChartView) -> Int { 
      return 3 
     } 

     func pieChartView(_ pieChartView: ORKPieChartView, valueForSegmentAt index: Int) -> CGFloat { 
      switch index { 
      case 0: 
       return 60.0 
      case 1: 
       return 25.0 
      case 2: 
       return 15.0 
      } 

      // Optional methods 
      // Give a color to each segment in the pie chart. 
      func pieChartView(pieChartView: ORKPieChartView, colorForSegmentAtIndex index: Int) -> UIColor { 
       return colors[index] 
      } 

      // Give a title to each segment in the pie chart. 
      func pieChartView(pieChartView: ORKPieChartView, titleForSegmentAtIndex index: Int) -> String { 
       switch index { 
       case 0: 
        return "Steps taken" 
       case 1: 
        return "Tasks completed" 
       case 2: 
        return "Surveys completed" 
       default: 
        return "task \(index + 1)" 
       } 
      } 
     } 
    } 

Answer 1

Der Fehler ‚Typ 'Viewcontroller' entspricht nicht Protokoll 'ORK PieChartView Datasource means that you are not implemented all the required data source methods' ..... Hier im Code geschrieben Sie wrong datasource method als func pieChartView(_ pieChartView: ORKPieChartView, valueForSegmentAt index: Int) -> CGFloat, ändern sie es wie unten .....

func pieChartView(pieChartView: ORKPieChartView, valueForSegmentAt index: Int) -> CGFloat { 
       switch index { 
       case 0: 
        return 60.0 
       case 1: 
        return 25.0 
       case 2: 
        return 15.0 
       }