Emoji convert to UIImage. Swift 4

emojiToImage

func emojiToImage(text: String, size: CGFloat) -> UIImage {

		let outputImageSize = CGSize.init(width: size, height: size)
		let baseSize = text.boundingRect(with: CGSize(width: 2048, height: 2048),
		                                 options: .usesLineFragmentOrigin,
		                                 attributes: [.font: UIFont.systemFont(ofSize: size / 2)], context: nil).size
		let fontSize = outputImageSize.width / max(baseSize.width, baseSize.height) * (outputImageSize.width / 2)
		let font = UIFont.systemFont(ofSize: fontSize)
		let textSize = text.boundingRect(with: CGSize(width: outputImageSize.width, height: outputImageSize.height),
		                                 options: .usesLineFragmentOrigin,
		                                 attributes: [.font: font], context: nil).size

		let style = NSMutableParagraphStyle()
		style.alignment = NSTextAlignment.center
		style.lineBreakMode = NSLineBreakMode.byClipping

		let attr : [NSAttributedStringKey : Any] = [NSAttributedStringKey.font : font,
		             NSAttributedStringKey.paragraphStyle: style,
		             NSAttributedStringKey.backgroundColor: UIColor.clear ]

		UIGraphicsBeginImageContextWithOptions(outputImageSize, false, 0)
		text.draw(in: CGRect(x: (size - textSize.width) / 2,
		                     y: (size - textSize.height) / 2,
		                     width: textSize.width,
		                     height: textSize.height),
		                     withAttributes: attr)
		let image = UIGraphicsGetImageFromCurrentImageContext()!
		UIGraphicsEndImageContext()
		return image
	}

Awesome!