NibLoadableView.swift

NibLoadableView.swift

import UIKit


class NibLoadableView: UIView {
    
    @IBOutlet var view: UIView!
    
    override init(frame: CGRect) {
        super.init(frame: frame)
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        
        let className = self.dynamicType
        let nibName = NSStringFromClass(className).componentsSeparatedByString(".").last!
        UINib(nibName: nibName, bundle: nil).instantiateWithOwner(nil, options: nil)
        
        let views = ["subview":view]
        self.addSubview(view)
        view.translatesAutoresizingMaskIntoConstraints = false
        self.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|[subview]|", options: [], metrics: nil, views: views))
        self.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|[subview]|", options: [], metrics: nil, views: views))
    }
}

Thank you! I had to change nil to self in UINib(nibName: nibName, bundle: nil).instantiateWithOwner(self, options: nil)