A button with an icon on top

TopIconButton.swift

import Foundation

class TopIconButton: UIButton {

	var color: UIColor = Color.Green

	private init(with color: UIColor) {
		self.color = color

		super.init(frame: .zero)
	}

	convenience init(color: UIColor) {
		self.init(with: color)

		tintColor = color
		imageView?.contentMode = .scaleAspectFit
	}

	override init(frame: CGRect) {
		super.init(frame: frame)

		tintColor = color
		imageView?.contentMode = .scaleAspectFit
	}

	override func layoutSubviews() {
		super.layoutSubviews()

		adjustImageAndTitleVertically()
	}

	required init?(coder aDecoder: NSCoder) {
		fatalError("init(coder:) has not been implemented")
	}

	private func adjustImageAndTitleVertically() {
		let spacing: CGFloat = 3
		let titleSize: CGSize = titleLabel!.frame.size
		let imageSize: CGSize = imageView!.frame.size

		titleEdgeInsets = UIEdgeInsets(top: 0, left: -imageSize.width, bottom: -(imageSize.height + spacing), right: 0)
		imageEdgeInsets = UIEdgeInsets(top: -(titleSize.height + spacing), left: 0, bottom: 0, right: -titleSize.width)
	}
}