Simple Pie Chart made in Swift
Example:
let pieChartView = PieChartView(frame: CGRectMake(0, 0, 300, 200))
pieChartView.addItem(20, color: UIColor.redColor())
pieChartView.addItem(20, color: UIColor.greenColor())
pieChartView.addItem(60, color: UIColor.brownColor())
pieChartView.setNeedsDisplay()