Setting description-labels in ios-pieChart

Question

I'm working with this library. I need to construct a PieChart do display some data. I copied and example peace of code from raywenderlich-website, so the question is that how can I set all labels from array "months" to below description labels (where now just "qwe" is shown) with the same colors as peaces OR how to remove them all?

Also it's impossible to change label "description" from right-below corner because it says me that "description is immutable"

@IBOutlet weak var pieChartView: PieChartView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let months = ["qwe", "asd", "zxc"]
        let unitsSold = [20.0, 15.0, 17.0]

        pieChartView.noDataTextDescription = "nothing here"

        setChart(months, values: unitsSold)

    }

    func setChart(dataPoints: [String], values: [Double]) {

        var dataEntries: [ChartDataEntry] = []
        for i in 0..<dataPoints.count {
            let dataEntry = ChartDataEntry(value: values[i], xIndex: i)
            dataEntries.append(dataEntry)
        }

        let pieChartDataSet = PieChartDataSet(yVals: dataEntries)

        let pieChartData = PieChartData(xVals: dataPoints, dataSet: pieChartDataSet)
        pieChartDataSet.label = ""
        pieChartView.data = pieChartData

        var colors: [UIColor] = []

         colors.append(UIColor.greenColor())
         colors.append(UIColor.blueColor())
         colors.append(UIColor.blackColor())

        pieChartDataSet.colors = colors





    }

Answer 1

In the library document, it says

By default, all chart types support legends and will automatically generate and draw a legend after setting data for the chart.

Edited

READ through the library please!

As shown in the demo of the library, you should be able to do

pieChartView.descriptionText = "";

For the legend, you should be able to set the legend by

let legend = pieCharView.legend
legend.setCustom(colors: [UIColor.greenColor(), UIColor.blueColor(), UIColor.blackColor()], labels: ["qwe", "asd", "zxc"])

or disable it by

legend.isEnabled = false