How to show Percentage sign in pie chart using daniel gindi/Chart library in swift(IOS Chart)

Question

I am using the Charts framework (by Daniel gindi). It was working fine but how to show % (sign) on piechart?
I am also try use NSNumberFormatter() method for covert data v

Answer 1

To show % sign on pieChart.

Download Example Project

Just use this below code.

let formatter = NSNumberFormatter()
formatter.numberStyle = .PercentStyle
formatter.maximumFractionDigits = 1
formatter.multiplier = 1.0
pieChartData.dataSet?.valueFormatter = formatter

You will get % sign after your value display on slice.

Source https://github.com/danielgindi/Charts

Have a happy coding.

Answer 2

    let formatter = NumberFormatter()
    formatter.numberStyle = .percent
    formatter.maximumFractionDigits = 1
    formatter.multiplier = 1.0
    chart.data?.setValueFormatter(formatter as? IValueFormatter)

Answer 3

On Swift3 with latest version of charts you can do % formatting on pie chart as followings:

    let formatter = NumberFormatter()
    formatter.numberStyle = .percent
    formatter.maximumFractionDigits = 1
    formatter.multiplier = 1.0
    pieChartData.setValueFormatter(DefaultValueFormatter(formatter:formatter))

Answer 4

Just add these line to format the percentage in PieChart.

     let formatter = NSNumberFormatter()
                        formatter.numberStyle = .PercentStyle
                        formatter.maximumFractionDigits = 1
                        formatter.multiplier = 1.0
                        pieChartData.setValueFormatter(formatter)
// text color of percentage label
    slcCell.pieChartView.data?.setValueTextColor(UIColor.clearColor())