UILabel subclass that resizes the font size to fit width AND height

UIFitLabel.swift

//
//  UIFitLabel.swift
//  
//
//  Created by Txai Wieser on 8/27/15.
//  Copyright © 2015 Txai Wieser. All rights reserved.
//

import UIKit

@IBDesignable class UIFitLabel: UILabel {

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        initialize()
    }
    override init(frame: CGRect) {
        super.init(frame: frame)
        initialize()
    }
    
    func initialize() {
        numberOfLines = 1
        adjustsFontSizeToFitWidth = true
        minimumScaleFactor = 0
        textAlignment = NSTextAlignment.Center
        baselineAdjustment = UIBaselineAdjustment.AlignCenters
    }

    override func prepareForInterfaceBuilder() {
        initialize()
    }
    override var frame:CGRect {
        didSet {
            font = font.fontWithSize(frame.height)
        }
    }
}