使用Core Plot和Swift绘制多个散点图

import UIKit
import CorePlot

class ScatterPlotViewController: UIViewController, CPTPlotDataSource {
    
    var scatterPlotView: CPTGraphHostingView!
    var scatterPlotData: [[NSNumber]] = [[1, 2, 3, 4, 5], [2, 4, 1, 5, 3], [3, 1, 5, 2, 4]] // 示例数据
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建绘图视图
        scatterPlotView = CPTGraphHostingView(frame: view.bounds)
        view.addSubview(scatterPlotView)
        
        // 创建绘图对象
        let scatterPlot = CPTXYGraph(frame: scatterPlotView.bounds)
        scatterPlot.title = "Scatter Plot"
        
        // 创建散点图绘制
        let plot = CPTScatterPlot()
        plot.dataSource = self
        
        // 设置散点图样式
        let lineStyle = CPTMutableLineStyle()
        lineStyle.lineWidth = 2.0
        lineStyle.lineColor = .blue
        plot.dataLineStyle = lineStyle
        
        // 设置数据点样式
        let symbol = CPTPlotSymbol.ellipse()
        symbol.fill = CPTFill(color: .red)
        symbol.size = CGSize(width: 6, height: 6)
        plot.plotSymbol = symbol
        
        // 添加绘图对象和绘制到绘图视图
        scatterPlot.add(plot)
        scatterPlotView.hostedGraph = scatterPlot
        
        // 刷新绘图
        scatterPlotView.hostedGraph?.reloadData()
    }
    
    // 实现数据源方法
    func numberOfRecords(for plot: CPTPlot) -> UInt {
        return UInt(scatterPlotData[0].count)
    }
    
    func number(for plot: CPTPlot, field fieldEnum: UInt, record idx: UInt) -> Any? {
        let field = CPTScatterPlotField(rawValue: Int(fieldEnum))
        return scatterPlotData[Int(field!.rawValue)][Int(idx)]
    }
}