XIB UIView template with Autolayout

XIBTemplateView.swift

//
//  XIBTemplateView.swift
//  JanuaryEffect
//
//  Created by Wanbok on 2015. 11. 18..
//  Copyright © 2015년 JanuaryEffect. All rights reserved.
//

import UIKit

class XIBTemplateView: UIView {
    // MARK: Initializer
    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)!
        setup()
    }
    
    init() {
        setup()
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setup()
    }
    
    func setup() {
        let view = NSBundle.mainBundle().loadNibNamed(classNameAsString, owner: self, options: nil)[0] as! UIView
        self.addSubview(view)
        self.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|[view]|", options: NSLayoutFormatOptions(), metrics: nil, views: ["view": view]))
        self.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|[view]|", options: NSLayoutFormatOptions(), metrics: nil, views: ["view": view]))
        self.backgroundColor = UIColor.clearColor()
    }
}