如何使用带字符串的xAxis绘制2个LineCharts

Question

我是编程和swift的新手，我正在尝试制作一个包含2行的图表。在图表的顶部列举我拥有的字符串数组（在我的情况下为DD-MM）。我设法只画了一行：

 let testArrayTemp = [22.43, 14.86,20.63, 17.08,23.68,14.12,11.09,13.89, 15.0, 9.86, 7.71,10.0,11.94, 8.68, 8.91,6.81, 9.03,8.89, 9.7, 9.26, 9.43,10.22, 9.04,8.04, 7.56,10.44, 7.22, 13.67,9.44, 7.67, 5.99]
     let testArrayFeel = [20.43, 13.86,10.63, 15.08,22.68,11.12,10.09,15.89, 13.0, 6.86, 5.71,11.0,10.94, 7.68, 6.91,5.81, 3.03,5.89, 7.7, 8.26, 8.43, 11.22, 6.04,7.04, 6.56,11.44, 6.22, 12.67,10.44, 5.67, 4.99]
    let testDayArray = ["Oct 2, 2016", "Oct 3, 2016", "Oct 4, 2016", "Oct 5, 2016", "Oct 6, 2016", "Oct 7, 2016", "Oct 8, 2016", "Oct 9, 2016", "Oct 10, 2016", "Oct 11, 2016", "Oct 12, 2016", "Oct 13, 2016", "Oct 14, 2016", "Oct 15, 2016", "Oct 16, 2016", "Oct 17, 2016", "Oct 18, 2016", "Oct 19, 2016", "Oct 20, 2016", "Oct 21, 2016", "Oct 22, 2016", "Oct 23, 2016", "Oct 24, 2016", "Oct 25, 2016", "Oct 26, 2016", "Oct 27, 2016", "Oct 28, 2016", "Oct 29, 2016", "Oct 30, 2016", "Oct 31, 2016", "Nov 1, 2016"]
    setChart(dataPoints: testDayArray, valuesTempChart: testArrayTemp, valuesFeelChart: testArrayFeel)
}

//MARK:- Set Chart
func setChart(dataPoints: [String], valuesTempChart: [Double], valuesFeelChart: [Double])
{
    var tempEntries: [ChartDataEntry] = []

    for i in 0..<dataPoints.count
    {
        let dataEntry = ChartDataEntry(x: Double(i), y: valuesTempChart[i])
        tempEntries.append(dataEntry)
    }

    let lineChartDataSetTemp = LineChartDataSet(values: tempEntries, label: "Temperature")
    lineChartDataSetTemp.setColor(UIColor.red)
   // lineChartDataSetTemp.mode = .cubicBezier
    lineChartDataSetTemp.drawCirclesEnabled = true
    lineChartDataSetTemp.lineWidth = 2.0
    lineChartDataSetTemp.circleRadius = 5.0
    lineChartDataSetTemp.highlightColor = UIColor.green
    lineChartDataSetTemp.drawHorizontalHighlightIndicatorEnabled = true

    var dataSets = [IChartDataSet]()
    dataSets.append(lineChartDataSetTemp)
    let lineChartDataTemp = LineChartData(dataSets: dataSets)
    lineChart.data = lineChartDataTemp
    lineChart.animate(xAxisDuration: 2.0, yAxisDuration: 2.0)

    lineChart.noDataText = "There is no provided data from the server. Please check out later!"
}

但看起来如此：

我需要做什么才能在顶部显示String数组（包含日期）并添加一行。请任何想法，或者可能链接到SWIFT 3中的教程而不是其他版本，因为他们做了很多更改，并且swift 2教程中没有任何内容可以正常工作，但自动更正甚至更糟。 我希望它看起来像这样:(但有2行和几天而不是几个月）

感谢您提出任何建议

Answer 1

您需要做的是重复感觉数据的过程。参考下面的代码。

func setChart(dataPoints: [String], valuesTempChart: [Double],valuesFeelChart: [Double])
{
var tempEntries: [ChartDataEntry] = []
var feelEntries: [ChartDataEntry] = []

for i in 0..<dataPoints.count
{
    let dataEntryOne = ChartDataEntry(x: Double(i), y: valuesTempChart[i])
    let dataEntryTwo = ChartDataEntry(x: Double(i), y: valuesFeelChart[i])
    tempEntries.append(dataEntryOne)
    feelEntries.append(dataEntryTwo)
}

let lineChartDataSetTemp = LineChartDataSet(values: tempEntries, label: "Temperature")
let lineChartDataSetFeels = LineChartDataSet(values: feelEntries, label: "Feels")

var dataSets = [IChartDataSet]()
dataSets.append(lineChartDataSetTemp)
dataSets.append(lineChartDataSetFeels)
let lineChartD = LineChartData(dataSets: dataSets)
lineChart.data = lineChartD
lineChart.animate(xAxisDuration: 2.0, yAxisDuration: 2.0)

lineChart.noDataText = "There is no provided data from the server. Please check out later!"

}

希望这有帮助！