问核心情节中的可点击传奇

EN

class ViewController: NSViewController, CPTPlotDataSource, CPTPieChartDataSource {

@IBOutlet weak var graphView: CPTGraphHostingView!

override func viewDidLoad() {
    super.viewDidLoad()

    let graph = CPTXYGraph(frame: CGRect.zero)        
    var axes = graph.axisSet as! CPTXYAxisSet
    var lineStyle = CPTMutableLineStyle()
    lineStyle.lineWidth = 0
    axes.xAxis?.axisLineStyle = lineStyle
    axes.yAxis?.axisLineStyle = lineStyle


    var pie = CPTPieChart()
    pie.pieRadius = 100
    pie.dataSource = self
    pie.centerAnchor = CGPoint(x: 0.18, y: 0.75)
    graph.add(pie)        

    var theLegend=CPTLegend(graph: graph)
    var legendFill=CPTFill(color: CPTColor.gray())
    theLegend.fill = legendFill
    var legendLineStyle = CPTMutableLineStyle()
    legendLineStyle.lineColor = CPTColor.white()
    theLegend.borderLineStyle = legendLineStyle
    theLegend.cornerRadius = 2.0
    theLegend.frame = CGRect(x: 0, y: 0, width: 0.1, height: 50)
    theLegend.numberOfColumns = 1

    graph.legend = theLegend
    graph.legendDisplacement = CGPoint(x: 0.5, y: 300)

    self.graphView.hostedGraph = graph
}