Add border to any side of UIView

gistfile1.txt

import Foundation

extension UIView{
    
    func border(color : UIColor, side : String, width : CGFloat)
    {
        var borderFrame = CGRect.zero
        switch side {
        case "left":
            borderFrame = CGRect(x: 0.0, y: 0.0, width: width, height: self.frame.size.height)
            break
        case "right":
            borderFrame = CGRect(x: self.frame.size.width - 1.0, y: 0.0, width: width, height: self.frame.size.height)
            break
        case "top":
            borderFrame = CGRect(x: 0.0, y: 0.0, width: self.frame.size.width, height: width)
            break
        case "bottom":
            borderFrame = CGRect(x: 0.0, y: self.frame.size.height - 1, width: self.frame.size.width, height: width)
            break
        default:
            borderFrame = CGRect(x: 0.0, y: 0.0, width: width, height: self.frame.size.height)
            break
        }
        
        let border : CALayer = CALayer()
        border.backgroundColor = color.cgColor
        border.frame = borderFrame
        border.name = side
        self.layer.addSublayer(border)
    }
    
    func removeBorderForName(name : String)
    {
        if let lrs = self.layer.sublayers, lrs.count > 0
        {
            for lr in self.layer.sublayers!
            {
                if lr.name == name
                {
                    lr.removeFromSuperlayer()
                    break
                }
            }
        }
        
    }
    
    func border(color : UIColor, side : String, width : CGFloat, shift : CGFloat)
    {
        var borderFrame = CGRect.zero
        switch side {
        case "left":
            borderFrame = CGRect(x: shift, y: 0.0, width: width, height: self.frame.size.height)
            break
        case "right":
            borderFrame = CGRect(x: self.frame.size.width - 1.0 + shift, y: 0.0, width: width, height: self.frame.size.height)
            break
        case "top":
            borderFrame = CGRect(x: 0.0, y: shift, width: self.frame.size.width, height: width)
            break
        case "bottom":
            borderFrame = CGRect(x: 0.0, y: self.frame.size.height - 1 + shift, width: self.frame.size.width, height: width)
            break
        default:
            borderFrame = CGRect(x: 0.0, y: 0.0, width: width, height: self.frame.size.height)
            break
        }
        
        let border : CALayer = CALayer()
        border.backgroundColor = color.cgColor
        border.frame = borderFrame
        border.name = side
        self.layer.addSublayer(border)
    }
    
    func border(color : UIColor, frameForBorder : CGRect)
    {
        let border : CALayer = CALayer()
        border.backgroundColor = color.cgColor
        border.frame = frameForBorder
        self.layer.addSublayer(border)
    }
}