Create app icon for iPhone

letterImageGenerator.swift

class func imageWith(name: String?) {
        //sizes = [Int]
        sizes.forEach { (value) in
            let frame = CGRect(x: 0, y: 0, width: value, height: value)
            let nameLabel = UILabel(frame: frame)
            nameLabel.textAlignment = .center
            nameLabel.backgroundColor = .black
            nameLabel.textColor = .white
            var fontSize = 25
            if value == 120 {
                fontSize = 50
            } else if value == 180 {
                fontSize = 60
            }
            nameLabel.font = UIFont.boldSystemFont(ofSize: CGFloat(fontSize))
            nameLabel.text = String(name?.prefix(2) ?? "Aa")
            
            //logic i wanted to port to macos
            UIGraphicsBeginImageContext(frame.size)
            if let currentContext = UIGraphicsGetCurrentContext() {
                nameLabel.layer.render(in: currentContext)
                let nameImage = UIGraphicsGetImageFromCurrentImageContext()

                //function which will save images to documents directory
                saveImageToDocumentDirectory(image: nameImage, name: name ?? "dummy", value: value)
            }
        }
    }