X 轴值被重复而不是被替换 iOS 图表

Question

轴上的值似乎是重复的而不是被替换，正如您在下面的屏幕截图中看到的那样，它应该绘制 "Jan"、"Feb"、"Mar"， "Apr"、"May"、"Jun" 而不是模拟器中的结果。

这是代码

class ViewController: UIViewController {

    @IBOutlet weak var chartContainer: LineChartView!
    let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
    let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 3.0]


    override func viewDidLoad() {
        super.viewDidLoad()


        setChart(dataPoints: months, values: unitsSold)



    }

    func setChart(dataPoints: [String], values: [Double]) {

        // Set up x axis
        let xaxis = XAxis()
        let chartFormatter = ChartFormatter(myArr: months)

        // Array for entries
        var dataEntries: [ChartDataEntry] = []

        // Add new data entries
        for i in 0..<dataPoints.count {

            let dataEntry = ChartDataEntry(x: Double(i) , y: values[i], data: "a" as AnyObject? )

            dataEntries.append(dataEntry)
            chartFormatter.stringForValue(Double(i), axis: xaxis)
        }

        xaxis.valueFormatter = chartFormatter
        chartContainer.xAxis.valueFormatter = xaxis.valueFormatter

        // Configure the dataset
        let lineChartDataSet = LineChartDataSet(values: dataEntries, label: "Units Sold")
        let lineChartData = LineChartData(dataSet: lineChartDataSet)




        chartContainer.data = lineChartData



    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

@objc(ChartFormatter)
class ChartFormatter: NSObject, IAxisValueFormatter {

    private var myArr: [String]!

    init(myArr: [String]) {


        self.myArr = myArr
    }

    func stringForValue(_ value: Double, axis: AxisBase?) -> String {

        return myArr[Int(value)]
    }
}

Answer 1

我通过添加

自行解决了这个问题

   chartContainer.xAxis.granularityEnabled = true
   chartContainer.xAxis.granularity = 1.0

X 轴值被重复而不是被替换 iOS 图表

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