如何将不相关的数组添加到iOS-charts折线图中的数据点标签？

import Charts

// 创建折线图实例
let lineChartView = LineChartView(frame: CGRect(x: 0, y: 0, width: 300, height: 200))

// 创建不相关的数据数组
let unrelatedData = [10, 20, 30, 40, 50]

// 设置折线图数据
let dataEntries = [ChartDataEntry(x: 0, y: 20),
                   ChartDataEntry(x: 1, y: 30),
                   ChartDataEntry(x: 2, y: 25),
                   ChartDataEntry(x: 3, y: 35),
                   ChartDataEntry(x: 4, y: 40)]

let dataSet = LineChartDataSet(entries: dataEntries, label: "相关数据")
let data = LineChartData(dataSet: dataSet)

// 将不相关的数据添加到数据点标签中
for i in 0..<dataEntries.count {
    let entry = dataEntries[i]
    let unrelatedValue = unrelatedData[i]
    let label = "\(entry.y)\n\(unrelatedValue)"
    dataSet.valueFormatter = DefaultValueFormatter(formatter: NumberFormatter())
    dataSet.valueFormatter?.stringForValue(entry.y, entry: entry, dataSetIndex: 0, viewPortHandler: lineChartView.viewPortHandler)
    dataSet.valueFormatter?.stringForValue(Double(unrelatedValue), entry: entry, dataSetIndex: 0, viewPortHandler: lineChartView.viewPortHandler)
    dataSet.valueFormatter = DefaultValueFormatter(formatter: NumberFormatter())
    dataSet.valueFormatter?.stringForValue(Double(unrelatedValue), entry: entry, dataSetIndex: 0, viewPortHandler: lineChartView.viewPortHandler)
    dataSet.valueFormatter = DefaultValueFormatter(formatter: NumberFormatter())
    dataSet.valueFormatter?.stringForValue(Double(unrelatedValue), entry: entry, dataSetIndex: 0, viewPortHandler: lineChartView.viewPortHandler)
}

// 设置其他折线图属性
lineChartView.data = data
lineChartView.xAxis.labelPosition = .bottom
lineChartView.xAxis.drawGridLinesEnabled = false
lineChartView.rightAxis.enabled = false

// 将折线图添加到视图中
view.addSubview(lineChartView)