ios - 如何使用 Daniel Gindis 图表库在同一轴上绘制相同类型的图表(在折线图中)？

Question

我有一个图表，可以在同一轴上显示多个折线图和散点图。它们都将具有相同的 x 轴。我似乎不能在同一轴内放置多个折线图。

我已经尝试实现 CombinedChartView。我创建了一个函数，该函数接收相应数据集的数组。

    func customiseChart (rule1x: [Double], rule1y: [Double], rule2x: [Double], rule2y: [Double], rule3x: [Double], rule3y: [Double], rule4x: [Double], rule4y: [Double], rule5x: [Double], rule5y: [Double], rule6x: [Double], rule6y: [Double], rule7x: [Double], rule7y: [Double], suppressedSparksX: [Double], suppressedSparksY: [Double], exsuppressedSparksX: [Double], exsuppressedSparksY: [Double], CombinedChartView: CombinedChartView, labelRule1: String, labelRule2: String, labelRule3: String, labelRule4: String, labelRule5: String, labelRule6: String, labelRule7: String, labelSuppressed: String, labelExsuppressed: String)  {

        //1) set ChartDataEntry for all the graphs
        var rule1ChartEntries: [ChartDataEntry] = []
        for i in 0..<rule1y.count {
            let entries = ChartDataEntry(x: rule1x[i], y: rule1y[i])
            rule1ChartEntries.append(entries)
        }

          . . .

        var rule7ChartEntries: [ChartDataEntry] = []
        for i in 0..<rule7y.count {
            let entries = ChartDataEntry(x: rule7x[i], y: rule7y[i])
            rule7ChartEntries.append(entries)
        }
        var suppressedScatterChartEntries: [ChartDataEntry] = []
        for i in 0..<suppressedSparksY.count {
            let entries = ChartDataEntry(x: suppressedSparksX[i], y: suppressedSparksY[i])
            suppressedScatterChartEntries.append(entries)
        }
        var exsuppressedScatterChartEntries: [ChartDataEntry] = []
        for i in 0..<exsuppressedSparksY.count {
            let entries = ChartDataEntry(x: exsuppressedSparksX[i], y: exsuppressedSparksY[i])
            exsuppressedScatterChartEntries.append(entries)
        }

        //2) set ChartDataSet for all the charts
        let rule1DataSet = LineChartDataSet(entries: rule1ChartEntries, label: labelRule1)
        rule1DataSet.colors = [NSUIColor.black]
        let rule1data = LineChartData()
        rule1data.addDataSet(rule1DataSet)
        rule1DataSet.drawCirclesEnabled = false
        rule1DataSet.drawValuesEnabled = false

        let rule2DataSet = LineChartDataSet(entries: rule2ChartEntries, label: labelRule2)
        rule2DataSet.colors = [NSUIColor.darkGray]
        let rule2data = LineChartData()
        rule2data.addDataSet(rule2DataSet)
        rule2DataSet.drawCirclesEnabled = false
        rule2DataSet.drawValuesEnabled = false

           . . .

        let rule7DataSet = LineChartDataSet(entries: rule7ChartEntries, label: labelRule7)
        rule7DataSet.colors = [NSUIColor.yellow]
        let rule7data = LineChartData()
        rule7data.addDataSet(rule7DataSet)
        rule7DataSet.drawCirclesEnabled = false
        rule7DataSet.drawValuesEnabled = false

        let suppressedSparkDataSet = ScatterChartDataSet(entries: suppressedScatterChartEntries, label: labelSuppressed)
        suppressedSparkDataSet.colors = [NSUIColor.red]
        let suppressedData = ScatterChartData()
        suppressedData.addDataSet(suppressedSparkDataSet)

        let exsuppressedSparkDataSet = ScatterChartDataSet(entries: exsuppressedScatterChartEntries, label: labelExsuppressed)
        exsuppressedSparkDataSet.colors = [NSUIColor.blue]
        let exsuppressedData = ScatterChartData()
        exsuppressedData.addDataSet(exsuppressedSparkDataSet)

        // 3) set combinedData
        let combinedData = CombinedChartData()
        combinedData.lineData = rule1data
        combinedData.lineData = rule2data
        combinedData.lineData = rule3data
        combinedData.lineData = rule4data
        combinedData.lineData = rule5data
        combinedData.lineData = rule6data
        combinedData.lineData = rule7data

        combinedData.scatterData = suppressedData
        combinedData.scatterData = exsuppressedData

        //4) assign all the data into the combined chart
        CombinedChartView.data = combinedData

    }

我想让所有的图表都显示在图表上。但是，只显示最后声明的 lineChart 和 ScatterChart，即图表上只有 rule7data 和 exsuppressedData。图表的其余部分不显示。

Answer 1

而不是这样做

    let rule1data = LineChartData()
    rule1data.addDataSet(rule1DataSet)

您可以将多个数据集添加到一个 LineChartData

所以你可以这样做:

let allLineDatas = LineChartData(dataSets: [rule1DataSet, rule2DataSet,....])


combinedData.lineData = allLineDatas

其他人也一样。

combinedData.scatterData = allScatterDatas

你可以下载他们的sample project并在模拟器中运行，你会在那里找到各种例子，然后你可以找到你需要集成的例子的代码