change the color of the highlight point

[mariaCP]

Hello,
Is it possible change the color of the circle highlight point? Thank you!

[thierryH91200]

here's my logic
init array of circle Colors

      var circleColors = [NSUIColor]()
chartView.delegate = self

   func colorPicker(value : Double) -> NSUIColor {
   
        //input your own logic for how you actually want to color
        if value > 100 || value < 50 {
            return NSUIColor.red
        }
        else {
            return NSUIColor.black
        }
    }

    func setDataCount(_ count: Int, range: Double)
    {
        // MARK: ChartDataEntry
        var values = [ChartDataEntry]()
        var valueColors = [NSUIColor]()
      
        for i in 0..<count {
            let val: Double = Double(arc4random_uniform(UInt32(range)) + 3)
            values.append(ChartDataEntry(x: Double(i), y: val))
            valueColors.append(colorPicker(value: val))
            circleColors.append(colorPicker(value: val))
        }

        // MARK: LineChartDataSet
        var set1 = LineChartDataSet()
            set1 = LineChartDataSet(values: values, label: "DataSet 1")
            set1.circleRadius = 6.0
             
            set1.circleColors = circleColors
            set1.valueColors = valueColors
            
            set1.highlightLineDashLengths = [5.0, 2.5]
            set1.highlightColor = NSUIColor.black
            set1.highlightLineWidth = 2.0

            var dataSets = [LineChartDataSet]()
            dataSets.append(set1)
            
            // MARK: LineChartData
            let data = LineChartData(dataSets: dataSets)
            chartView.data = data
        }
}

the most important

// MARK: - ChartViewDelegate
extension LineChart1ViewController: ChartViewDelegate
{
    public func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight)
    {
        print("chartValueSelected : x = \(highlight.x) y = \(highlight.y)")
        
        var set1 = LineChartDataSet()
        set1 = (chartView.data?.dataSets[0] as? LineChartDataSet)!
        let values = set1.values
        let index = values.index(where: {$0.x == highlight.x})  // search index

        set1.circleColors = circleColors
        set1.circleColors[index!] = NSUIColor.cyan
        
        chartView.data?.notifyDataChanged()
        chartView.notifyDataSetChanged()
    }
    
    public func chartValueNothingSelected(_ chartView: ChartViewBase)
    {
        print("chartValueNothingSelected")

        var set1 = LineChartDataSet()
        set1 = (chartView.data?.dataSets[0] as? LineChartDataSet)!
        set1.circleColors = circleColors
        
        chartView.data?.notifyDataChanged()
        chartView.notifyDataSetChanged()
    }
}

[liuxuan30]

@thierryH91200 thanks!

[VivekNahar]

How can we change icon image if we set icon in the place of the circle?

[gurpreet72060]

Hlo,
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