add shadow to UIButton swift
globeButton.setImage(UIImage(named: "Globe"), forState: .Normal) globeButton.backgroundColor = UIColor(red: 171/255, green: 178/255, blue: 186/255, alpha: 1.0) // Shadow and Radius globeButton.layer.shadowColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.25).CGColor globeButton.layer.shadowOffset = CGSize(width: 0.0, height: 2.0) globeButton.layer.shadowOpacity = 1.0 globeButton.layer.shadowRadius = 0.0 globeButton.layer.masksToBounds = false globeButton.layer.cornerRadius = 4.0
