Question

我填充了具有折线图和分组条形图的组合图表但是酒吧没有像预期的那样出现。它们与xAxis索引不同步。任何帮助将不胜感激。

Combined Chart Image: Line + Grouped Bar

对于我附上的图片，酒吧应该与每个月保持同步但不是。

以下是代码：

private func setLineChartWith(data: [Double]) {

    var lineChartEntries: [ChartDataEntry] = []

    for i in 0..<data.count {

        let lineChartEntry = ChartDataEntry(value: data[i], xIndex: i)
        lineChartEntries.append(lineChartEntry)
    }

    let lineDataSet = LineChartDataSet(yVals: lineChartEntries, label: "Line")
    lineDataSet.lineWidth = 3
    lineDataSet.circleRadius = 4
    lineDataSet.mode = .CubicBezier
    lineDataSet.highlightEnabled = true

    let lineChartData = LineChartData(xVals: datesData, dataSets: [lineDataSet])
    chartData.lineData = lineChartData
}

    // MARK: Bar Chart Code
    func setBarChartWith(data: [Double], secondaryData: [Double]?) {

    var barChartEntries1: [BarChartDataEntry] = []
    var barChartEntries2: [BarChartDataEntry] = []
    for i in 0..<data.count {

        barChartEntries1.append(BarChartDataEntry(value: data[i], xIndex: i))
        barChartEntries2.append(BarChartDataEntry(value: data[i], xIndex: i))
    }

    let barDataSet = BarChartDataSet(yVals: barChartEntries1, label: "Bar1")
    barDataSet.barSpace = 0.5
    barDataSet.highlightEnabled = true
    barDataSet.barShadowColor = UIColor.clearColor()

    let barDataSet2 = BarChartDataSet(yVals: barChartEntries1, label: "Bar2")
    barDataSet2.barSpace = 0.5
    barDataSet2.highlightEnabled = true
    barDataSet2.barShadowColor = UIColor.clearColor()

    var dataSets : [BarChartDataSet] = [BarChartDataSet]()
    dataSets.append(barDataSet)
    dataSets.append(barDataSet2)
    let barChartData = BarChartData(xVals: datesData, dataSets: dataSets)
    chartData.barData = barChartData
}

Answer 1

可能您正在使用库来创建图形。这个bibliotca有这个问题，项目在x轴上受到限制。图表将它们分开，以便即使没有一些数据，用户也可以理解。您将意识到它始终从第一个索引开始，并以数组的最后一个索引结束，因此它从x轴的中间获取一些数据。因此，用户可以理解图形并且图形不会过载。库中没有正确的解决方案，但您可以尝试缩放图表或x轴上的标签。增加图表的宽度也应该有所帮助。

Answer 2

在课程级别设置

 var barCartDataSet : [IChartDataSet] = []

  var colNamesArray : [String]!

//根据需要多次调用此函数意味着在一个组中需要多少条形

setChartData("Test Lable", values: [2.0,3.0]  , color: UIColor.darkGrayColor())

//最后调用此

setChartDataSet(colNamesArray, chartDataSet: barCartDataSet)

// Functios

   func setChartData(lableName: String, values: [Double] , color : UIColor) {


        var dataEntries: [BarChartDataEntry] = []


        for i in 0..<values.count {
            let dataEntry = BarChartDataEntry(value: values[i], xIndex: i)
            dataEntries.append(dataEntry)
        }


        let chartDataSet = BarChartDataSet(yVals: dataEntries, label: lableName)

        barCartDataSet.append(chartDataSet)


        //changing color
        chartDataSet.colors = [color]   
    }

    func setChartDataSet(dataPoints: [String], chartDataSet : [IChartDataSet]) {

        BarChartDrawingView.noDataText = "You need to provide data for the chart."


        let chartData = BarChartData(xVals: dataPoints, dataSets: chartDataSet)

        chartData.groupSpace = 0.8

        BarChartDrawingView.data = chartData

        BarChartDrawingView.xAxis.labelPosition = .Bottom

        //Description Text
        BarChartDrawingView.descriptionText = " "



    }

抱歉英语不好。希望它有所帮助：）

iOS图表 - 分组条形图未正确索引

2 个答案: