"chartValueSelected" is not getting called in customView

[Schabaani]

I saw a lot issues here, however non of them solve my problem.

class LineChartLandscape : UIViewCustom, ChartViewDelegate {

    override init(frame: CGRect) {
        super.init(frame: frame)
        
        if UIDevice.current.orientation.isLandscape == false {
            AppHelper.lockOrientation(UIInterfaceOrientationMask.landscape, andRotateTo : .landscapeRight)
        }
        setupViews()
    }
    
    required init(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    var datasourceItem: Any? {
        didSet {
            guard let model = datasourceItem as? [AccTransactionTrend] else { return }

            let yse1 = model.map { x in
                return ChartDataEntry(x: Double(x.dayOfMonth)!, y: x.incomeAmount)
            }
            let ys2 = Array(1..<10).map { x in return cos(Double(x) / 2.0 / 3.141) }
            

            let yse2 = ys2.enumerated().map { x, y in return ChartDataEntry(x: Double(x), y: y) }
            
            
            let data = LineChartData()
            data.setDrawValues(true)
            
            let ds1 = LineChartDataSet(values: yse1, label: "Hello")
            ds1.colors = [NSUIColor.red]
            ds1.drawCirclesEnabled = true
            ds1.drawValuesEnabled = true
            ds1.circleHoleRadius = 0.4
            let colorSpace = CGColorSpaceCreateDeviceRGB()
            let ds1colours = [UIColor.red.cgColor, UIColor.white.cgColor] as CFArray
            let ds1Gradient = CGGradient(colorsSpace: colorSpace, colors: ds1colours, locations: [1.0, 0.0])
            ds1.fill = Fill(linearGradient: ds1Gradient!, angle: 90.0)
            
            ds1.drawFilledEnabled = true
            ds1.mode = .cubicBezier
            data.addDataSet(ds1)
            
            let ds2 = LineChartDataSet(values: yse2, label: "World")
            ds2.colors = [NSUIColor.blue]
            ds2.drawCirclesEnabled = false
            ds2.drawValuesEnabled = false
            let ds2colours = [UIColor.blue.cgColor, UIColor.white.cgColor] as CFArray
            let ds2Gradient = CGGradient(colorsSpace: colorSpace, colors: ds2colours, locations: [1.0, 0.0])
            ds2.fill = Fill(linearGradient: ds2Gradient!, angle: 90.0)
            
            
            ds2.drawFilledEnabled = true
            ds2.mode = .cubicBezier
            data.addDataSet(ds2)
            self.lineChartView.data = data
            
            self.lineChartView.gridBackgroundColor = NSUIColor.white
            
            self.lineChartView.chartDescription?.text = "Linechart Demo"
            
            // Grid
            lineChartView.xAxis.drawGridLinesEnabled = false
            lineChartView.leftAxis.drawGridLinesEnabled = false
            lineChartView.rightAxis.drawGridLinesEnabled = false
            
            
            // Number formatting of xAxis
            lineChartView.xAxis.drawLabelsEnabled = true
            lineChartView.leftAxis.drawLabelsEnabled = true
            lineChartView.drawMarkers = false
            
            lineChartView.xAxis.labelPosition = .bottom
            lineChartView.xAxis.labelFont = UIFont(fontType: .H5)!
            lineChartView.xAxis.labelTextColor = UIColor.dark_text
            lineChartView.xAxis.granularity = 1
            lineChartView.xAxis.drawLabelsEnabled = true
            lineChartView.data?.highlightEnabled = true

            lineChartView.data?.setDrawValues(false)
          //lineChartView.delegate = self

        }
    }

    
    func setupViews(){
        
        self.backgroundColor = UIColor.white
        
        addSubview(lineChartView)
        
        lineChartView.anchor(topAnchor, left: leftAnchor, bottom: bottomAnchor, right: rightAnchor, topConstant: 0, leftConstant: 10, bottomConstant: 0, rightConstant: 10, widthConstant: self.bounds.width, heightConstant: self.bounds.height)
        
        self.lineChartView.animate(xAxisDuration: 0.5, yAxisDuration: 0.0)
        
    }
    lazy var lineChartView: LineChartView = {
        let chartView = LineChartView()
        chartView.contentMode = .scaleAspectFit
        chartView.drawBordersEnabled = false
        chartView.legend.enabled = false
        chartView.chartDescription = nil
        chartView.highlighter = nil
        chartView.delegate = self
        chartView.clipsToBounds = true
        chartView.translatesAutoresizingMaskIntoConstraints = false
        return chartView
    }()
    
    public func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {
        print("Bar selected")
    }
}

chartValueSelected didn't get call. I click on lineChart and it doesn't do any thing. Where is the issue?

[Schabaani]

I've copied all of necessary codes to sample project. Everything works there. There is only one difference between them:

My project:
class LineChartLandscape : UIViewCustom, ChartViewDelegate
Sample code:
class BarChartViewController: UIViewController, ChartViewDelegate

In my project delegate doesn't work. How should I solve this problem?

[krispyk84]

      //lineChartView.delegate = self

If you uncomment this, does it work?

[Schabaani]

No, I don't why delegate doesn't work on custom view

[liuxuan30]

we don't think it's the library problem. You have made some tweaks in your so called "custom views", so you should start from testing your views hit test and gestures if they get delivered to the real chart view. prerequisite knowledge: responder chain