Pie chart not accepting more than one dataSet

[yazankhayyat]

Hello,

This issue was addressed in January as a bug , and it is yet to be resolved.
I am trying to add 2 PieChartDataSets to my PieChartView, but I keep running into the issue where one of the datasets unfolds as a nil when the renderer is creating the Legend object.

Here is my code (I know its super ugly but its a dummy project)

Here is a link to the same addressed issue - #2099

func setChart() {

    for value in stocks1 {
        let entry = PieChartDataEntry()
        entry.y = Double(value.amount)
        entry.label = value.name
        
        dataEntries1.append(entry)
    }
    for value in stocks2 {
        let entry = PieChartDataEntry()
        entry.y = Double(value.amount)
        entry.label = value.name
        
        dataEntries2.append(entry)
    }
    
    var colors1: [UIColor] = []
    var colors2: [UIColor] = []
    
    for _ in 0..<stocks1.count {
        let red = Double(arc4random_uniform(256))
        let green = Double(arc4random_uniform(256))
        let blue = Double(arc4random_uniform(256))
        
        let color = UIColor(red: CGFloat(red/255), green: CGFloat(green/255), blue: CGFloat(blue/255), alpha: 1)
        colors1.append(color)
    }
    
    for _ in 0..<stocks2.count {
        let red = Double(arc4random_uniform(256))
        let green = Double(arc4random_uniform(256))
        let blue = Double(arc4random_uniform(256))
        
        let color = UIColor(red: CGFloat(red/255), green: CGFloat(green/255), blue: CGFloat(blue/255), alpha: 1)
        colors2.append(color)
    }
    let set1 = ChartDataSet(values: dataEntries1, label: "Companies")
    let set2 = ChartDataSet(values: dataEntries2, label: "Companies2")
    let data1 = PieChartData(dataSets: [set1, set2])
    set1.colors = colors1
    set2.colors = colors2
    pieChartView.data = data1
}

[liuxuan30]

As far as I remember, pie chart only allow 1 data set.

    open override func getDataSetByIndex(_ index: Int) -> IChartDataSet?
    {
        if index != 0
        {
            return nil
        }
        return super.getDataSetByIndex(index)
    }

will add a guard to avoid crash