如何从danielgindi / chart ios的饼图图例中删除静态字符串“ DataSet”？

我正在使用danielgindi / Charts for iOS / Swift。饼图中有一个带有标签“ DataSet”的额外图例条目，如下图所示：

跟踪时，我发现在PieChartView图例中找到的LegendEntry数组中有两个条目，即PieChartView.legend.entries，因为我的数组中只有一个对象。

这是代码：

let dataSet = PieChartDataSet()
    dataSet.drawIconsEnabled = false
    dataSet.setColor(AppColors.selectedMenuItem)
    dataSet.sliceSpace = 3
    dataSet.iconsOffset = CGPoint(x: 0, y: 40)
    dataSet.selectionShift = 5

    var totalRevenuePer:Double = 0.0

    _ = arrRevenue.map({ (objRevenue) -> Void in
        if let percentage = Double(objRevenue.per ?? "0.0"), percentage != 0.0{
            dataSet.append(PieChartDataEntry(value: percentage, label: "\((objRevenue.rev_center_name ?? "") + " " + objRevenue.revenue.currencyString())"))
            totalRevenuePer += percentage
        }
    })

    var colors = AppColors.TenderColors
    if totalRevenuePer < 100{ colors.append(.clear) }
    dataSet.colors = colors

    let data = PieChartData(dataSet: dataSet)
    data.setValueFormatter(PercentageFormatter())
    data.setValueFont(NSUIFont.systemFont(ofSize: 11))
    data.setValueTextColor(.white)

    pieChart.data = data
    pieChart.highlightValue(nil)
    let legend = pieChart.legend
    legend.textColor = .white
    legend.entries.last?.label = ""

    pieChart.animate(yAxisDuration: 1.4, easingOption: .easeInOutQuad)

    // Refresh chart with new data
    pieChart.notifyDataSetChanged()

感谢您的帮助，谢谢。