I have to create a custom UIView that will have round corners, a border, a shadow and its drawRect() method is overridden to provide custom drawing
SWIFT 3 Solution
Adapted from Mundi's answer
class MyView : UIView {
override func draw(_ rect: CGRect) {
let c = UIGraphicsGetCurrentContext()
c!.addRect(CGRect(x: 10, y: 10, width: 80, height: 80))
c!.setStrokeColor(UIColor.red.cgColor)
c!.strokePath()
}
}
let superview = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
let shadowView = UIView(frame: CGRect(x: 50, y: 50, width: 100, height: 100))
shadowView.layer.shadowColor = UIColor.black.cgColor
shadowView.layer.shadowOffset = CGSize.zero
shadowView.layer.shadowOpacity = 0.5
shadowView.layer.shadowRadius = 5
let view = MyView(frame: shadowView.bounds)
view.backgroundColor = UIColor.white
view.layer.cornerRadius = 10.0
view.layer.borderColor = UIColor.gray.cgColor
view.layer.borderWidth = 0.5
view.clipsToBounds = true
shadowView.addSubview(view)
superview.addSubview(shadowView)