Add border line view to UIView by AutoLayout or FrameLayout

UIView+border.swift

//
//  UIView+border.swift
//  Makuake
//
//  Created by Takuya Okamoto on 1/9/18.
//  Copyright © 2018 CyberAgent Crowd Funding, Inc. All rights reserved.
//
import UIKit

extension UIView {
    
    enum BorderPosition {
        case top
        case right
        case bottom
        case left
    }
    
    enum LayoutType {
        case autoLayout
        case frameLayout
    }
    
    func addBorderLineViews(positions: [BorderPosition], borderWidth: CGFloat, borderColor: UIColor? = .appBorder, with layoutType: LayoutType) {
        positions.forEach { position in
            let line = UIView()
            line.backgroundColor = borderColor
            addSubview(line)
            switch layoutType {
            case .autoLayout:
                setAutoLayout(line: line, position: position, borderWidth: borderWidth)
            case .frameLayout:
                line.frame = borderFrame(position: position, borderWidth: borderWidth)
            }
        }
    }
    
    private func borderFrame(position: BorderPosition, borderWidth: CGFloat) -> CGRect {
        switch position {
        case .top   : return CGRect(x: 0.0, y: 0.0, width: frame.width, height: borderWidth)
        case .left  : return CGRect(x: 0.0, y: 0.0, width: borderWidth, height: frame.height)
        case .right : return CGRect(x: frame.width - borderWidth, y: 0.0, width: borderWidth, height: frame.height)
        case .bottom: return CGRect(x: 0.0, y: frame.height - borderWidth, width: frame.width, height: borderWidth)
        }
    }
    
    private func setAutoLayout(line: UIView, position: BorderPosition, borderWidth: CGFloat) {
        line.translatesAutoresizingMaskIntoConstraints = false
        switch position {
        case .top:
            line.topAnchor.constraint(equalTo: topAnchor).isActive = true
            line.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
            line.rightAnchor.constraint(equalTo: rightAnchor).isActive = true
            line.heightAnchor.constraint(equalToConstant: borderWidth).isActive = true
        case .left:
            line.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
            line.topAnchor.constraint(equalTo: topAnchor).isActive = true
            line.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
            line.widthAnchor.constraint(equalToConstant: borderWidth).isActive = true
        case .right:
            line.rightAnchor.constraint(equalTo: rightAnchor).isActive = true
            line.topAnchor.constraint(equalTo: topAnchor).isActive = true
            line.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
            line.widthAnchor.constraint(equalToConstant: borderWidth).isActive = true
        case .bottom:
            line.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
            line.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
            line.rightAnchor.constraint(equalTo: rightAnchor).isActive = true
            line.heightAnchor.constraint(equalToConstant: borderWidth).isActive = true
        }
    }
}