是否可以在BarChart列上处理点击事件？

Question

我知道MPAndroidChart可以处理图表上的事件.其文档都有详细记录.

然而,我无法找到有关相同事件的任何文档ios-chart.我知道它的创建者告诉我们应该遵循MPAndroidChart他的库的文档,但我无法在Swift 3.0上处理这些事件.

我也找不到任何处理ios-chart库的这些事件的例子.

那么,是否有可能处理ios-chart图书馆的点击事件？

编辑:根据@AdamM我的反馈,我将把数据设置到图表的功能.

func enterData(valuesChart: [BarChartDataEntry]){
    let chartDataSet = BarChartDataSet(values: valuesChart, label: "Total Values")

    let charData = BarChartData(dataSets: [chartDataSet])
    barChartView?.data = charData
    barChartView?.animate(xAxisDuration: 2.0, yAxisDuration: 2.0)
}

提前致谢!

Answer 1

是的,此功能内置于图表库中.确保您的类符合ChartViewDelegate协议.

编辑完整的代码示例

import UIKit
import Charts

@objc(BarChartFormatter)
public class BarChartFormatter: NSObject, IAxisValueFormatter
{
    var months: [String]! = ["Jan", "Feb", "Mar"]
    public func stringForValue(_ value: Double, axis: AxisBase?) -> String {

        return months[Int(value)]
    }
}


class ViewController: UIViewController,ChartViewDelegate
{
    @IBOutlet var barChart : BarChartView!
     let dataArray = ["Jan", "Feb", "Mar"]
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        self.title = "Testing"

        let values = [5.2,10.5,15.3]
        setBarChart(values: values)
        barChart.delegate = self
    }

    //MARK: Chart delegate methods
    func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {

        let pos = NSInteger(entry.x)
        print(dataArray[pos])
    }

    func chartValueNothingSelected(_ chartView: ChartViewBase)
    {

    }
    //MARK: Set chart
    func setBarChart(values: [Double])
    {
        var dataEntries: [BarChartDataEntry] = []

        for i in 0..<values.count {
            let dataEntry = BarChartDataEntry(x: Double(i), y: values[i])

            dataEntries.append(dataEntry)
        }
        let dataSet = BarChartDataSet(values: dataEntries, label: "")
        var dataSets : [IChartDataSet] = [IChartDataSet]()
        dataSets.append(dataSet)

        let format:BarChartFormatter = BarChartFormatter()
        let xAxis = barChart.xAxis
        xAxis.granularity = 1.0
        xAxis.labelPosition = .bottom
        xAxis.valueFormatter = format


        let chartData = BarChartData(dataSets: dataSets)
        barChart?.data = chartData

    }
}