IOS Swift Charts3.0 :How to add Xvals

Question

在Charts2.3中我们可以使用如下代码来添加数据。

代码:

let chartDataSet = LineChartDataSet(yVals: dataEntries, label: "Units Sold") 
let chartData = LineChartData(xVals: months, dataSet: chartDataSet)

但是在Charts3.0中，我找不到将月份添加到折线图的参数

代码:

var months: [String]!
months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 18.0, 2.0, 4.0, 5.0, 4.0]
setChart(dataPoints: months, values: unitsSold)

func setChart(dataPoints: [String], values: [Double]) {
        var dataEntries: [ChartDataEntry] = []
        for i in 0..<dataPoints.count {
            let dataEntry = ChartDataEntry(x: Double(i), y: values[i])
            dataEntries.append(dataEntry)
        }
        let lineChartDataSet = LineChartDataSet(values: dataEntries, label: "test")

        let lineChartData = LineChartData()
        lineChartData.addDataSet(lineChartDataSet)
  self.lineChartView.chartDescription?.text = "TestLinechart"
    }

Answer 1

对于以下函数，您可以设置折线图数据的值

  lineChartView.xAxis.valueFormatter = IndexAxisValueFormatter(values: dataPoints)

  lineChartView.xAxis.granularity = 1.0

希望这对你有帮助!!!