swift - 删除饼图图例中的文本 'DataSet'

Question

因此，我创建了一个带有饼图的 vc。饼图的图例在其后面显示了“DataSet”一词。这不是我故意放进去的……它来自哪里，我该如何摆脱它？

这是我的饼图代码:

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()(这就是生成默认数据集名称的原因)。

你想要的看起来像这样: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 init(values: insertPieChartDataEntrArrayHere, label: "") 之前创建您的 PieChartDataEntry 数组 函数。