摆脱PieChart图例中的文本“ DataSet”

Question

因此，我创建了一个带有pieChart的vc。 pieChart的图例在其后面显示单词“ DataSet”。我不是故意放进去的... 它来自哪里，如何摆脱它？

这是我的PieChart代码：

fileprivate func setupPieChart() {
    let titleParagraphStyle = NSMutableParagraphStyle()
    titleParagraphStyle.alignment = .center

    let attributedCenterText = NSAttributedString(string:"Number of Reports", attributes:
        [NSAttributedString.Key.foregroundColor: Settings.shared.currentTheme.textColor, NSAttributedString.Key.paragraphStyle: titleParagraphStyle])

    self.pieChartView.backgroundColor = .clear
    self.pieChartView.centerAttributedText = attributedCenterText
    self.pieChartView.drawEntryLabelsEnabled = false
    self.pieChartView.highlightPerTapEnabled = false
    self.pieChartView.holeColor = .clear
    self.pieChartView.legend.textColor = Settings.shared.currentTheme.textColor
    self.pieChartView.usePercentValuesEnabled = false
}

fileprivate func setupPieChartData() {
    let dataSet = PieChartDataSet()
    dataSet.colors = ChartColorTemplates.material()
    dataSet.valueColors = [Settings.shared.currentTheme.textColor]

    for key in self.data.keys.sorted() {
        if let team = self.teamService.team(for: key), let reportCount = self.data[key]?.count {
            let entry = PieChartDataEntry(value: Double(reportCount), label: team.teamName)
            dataSet.append(entry)
        }
    }

    let data = PieChartData(dataSet: dataSet)

    let formatter = NumberFormatter()
    formatter.numberStyle = .decimal
    formatter.maximumFractionDigits = 0
    data.setValueFormatter(DefaultValueFormatter(formatter: formatter))

    self.pieChartData = data
}

Answer 1

There are two public (to the class) PieChartDataSet init methods。

您使用的是这样的： public required init()（这是导致生成默认DataSet名称的原因。）

您想要的一个如下所示： public override init(values: [ChartDataEntry]?, label: String?)

然后您将为标签传递一个空字符串。

这意味着您必须在调用其他PieChartDataSet PieChartDataEntry函数之前，创建init(values: insertPieChartDataEntrArrayHere, label: "")数组 。