如何在触摸按钮时更新图表视图

Question

我有一个图表，显示每个蜡烛和 m3 蜡烛的欧元价格，所以我想在用户触摸按钮时更改它，例如如果它是欧元，则将其更改为 m3

使用的库：danielgindi/Charts

所以在下面的图表图像中：

1. 用户单击按钮，
2. 数据需要从 EURO 更改为 m3，
3. 标签需要从 EURO 更改为 m3。

到目前为止实现的代码：

extension dashboardViewController: AxisValueFormatter {
   AxisValueFormatter {

func stringForValue(_ value: Double, axis: AxisBase?) -> String {
    print(Int(value))
    return months[Int(value)]
    }
}

@IBAction func euroANDm3(_ sender: Any) {
    euroANDm3.addTarget(self, action: #selector(changeValue), for: .touchUpInside)
}


@objc func changeValue() {
    uniteuro = uniteurotest
    barChart.reloadInputViews()
}


override func viewDidLayoutSubviews() {
    super.viewDidLoad()
    axisFormatDelegate = self
    
    months = ["Jan",
              "Feb",
              "Mar",
              "Apr",
              "May",
              "Jun",
              "Jul",
              "Aug",
              "Sep",
              "Oct",
              "Nov",
              "Dec"
    ]
    uniteuro = [43,34,52,39,36,33,55,39,51,45,38,44]
    uniteurotest = [41,41,41,41,41,41,41,39,51,45,38,44]
    
    setChart(dataPoints: months, values: uniteuro)
}


func setChart(dataPoints: [String], values: [Double]) {
    barChart.noDataText = "NO DATA"
    
    var dataEntries = [BarChartDataEntry]()
    
    for i in 0..<dataPoints.count {
        let dataEntry = BarChartDataEntry(x: Double(i), y: values[i], data: dataPoints)
        
        dataEntries.append(dataEntry)
    }
    
    let chartDataSet = BarChartDataSet(entries: dataEntries, label: "EUR")
    let chartData = BarChartData(dataSet: chartDataSet)
    
    barChart.data = chartData
    
    barChart.xAxis.valueFormatter = axisFormatDelegate
}