如何在core plot swift中将值添加到我的图形？

import CorePlot

class ViewController: UIViewController, CPTPlotDataSource {
    var graphView: CPTGraphHostingView!
    var graph: CPTXYGraph!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建图形视图
        graphView = CPTGraphHostingView(frame: view.bounds)
        view.addSubview(graphView)
        
        // 创建图形对象
        graph = CPTXYGraph(frame: graphView.bounds)
        graphView.hostedGraph = graph
        
        // 创建绘图空间对象
        let plotSpace = graph.defaultPlotSpace as! CPTXYPlotSpace
        
        // 设置绘图空间的可视范围
        plotSpace.xRange = CPTPlotRange(locationDecimal: 0, lengthDecimal: 10)
        plotSpace.yRange = CPTPlotRange(locationDecimal: 0, lengthDecimal: 100)
        
        // 创建折线图形
        let linePlot = CPTScatterPlot()
        linePlot.dataSource = self
        
        // 将折线图形添加到绘图空间中
        graph.add(linePlot, to: plotSpace)
        
        // 刷新图形显示
        graphView.hostedGraph = graph
    }
    
    // 实现CPTPlotDataSource协议方法
    
    func numberOfRecords(for plot: CPTPlot) -> UInt {
        return 10 // 返回数据点数量
    }
    
    func number(for plot: CPTPlot, field: UInt, record: UInt) -> Any? {
        if field == UInt(CPTScatterPlotField.X.rawValue) {
            return NSNumber(value: record) // 返回x值
        } else if field == UInt(CPTScatterPlotField.Y.rawValue) {
            return NSNumber(value: record * 10) // 返回y值
        }
        return nil
    }
}