在PieChartView中仅显示来自（键，值）的数字

Question

我正在使用PieChartView在我的应用程序中绘制以下饼图。我的要求是仅显示％（percentage）而不显示键名。

这是我的视图中绘制饼图的代码

func drawPieChart(pieChart: PieChartView, data: [String: Double]) -> Void {

    //Setup constraints first

    var dataEntries = [PieChartDataEntry]()

    var total = 0.0
    for (key, val) in data {
        total += val
    }

    for (key, val) in data {
        let percent = (val / total)
        let entry = PieChartDataEntry(value: percent, label: key)
        dataEntries.append(entry)
    }

    let chartDataSet = PieChartDataSet(values: dataEntries, label: "")
    chartDataSet.colors = ChartColorTemplates.bookingPieChart()
    chartDataSet.sliceSpace = 2
    chartDataSet.selectionShift = 5

    let chartData = PieChartData(dataSet: chartDataSet)
    let formatter = NumberFormatter()
    formatter.numberStyle = .percent
    formatter.maximumFractionDigits = 0
    chartData.setValueFormatter(DefaultValueFormatter(formatter: formatter))
    pieChart.data = chartData
}

Answer 1

嗨，我想如果您不想显示键名，则需要在标签中发送一个空字符串

更改

 let entry = PieChartDataEntry(value: percent, label: key)

到

 let entry = PieChartDataEntry(value: percent, label: "")

Answer 2

以下代码使用“ LegendEntry”类解决了我的问题。

    for (key, val) in data {
        let percent = (val / total)
        let entry = PieChartDataEntry(value: percent, label: "")
        dataEntries.append(entry)

        let legendEntry: LegendEntry = LegendEntry(label: key, form: .circle, formSize: 5.0, formLineWidth: 0, formLineDashPhase: 0, formLineDashLengths: [0], formColor: colorData[key])
        legendEntries.append(legendEntry)            
    }

    pieChart.legend.setCustom(entries: legendEntries)

Answer 3

如果要保留图例，请在PieChartDataSet上使用

set.entryLabelColor = UIColor(hex: 1, a: 0)