allocateImageInPhotoPaper.swift

    override func viewDidAppear(_ animated: Bool) {
        
        if let img = UIImage(named: "Sonic") {
            
            let considerationPaperSize = CGSize(width: 1800, height: 2400)
            let outputImage = self.allocate(image: img, inPhotoPaper: considerationPaperSize)
            
            Thread.updateUI(byType: .async) {
                self.myImage.image = outputImage
            }
            
        }
        
    }
    
    func allocate(image: UIImage, inPhotoPaper paper: CGSize) -> UIImage? {
        
        let imageW: Int = Int(image.size.width)
        let imageH: Int = Int(image.size.height)
        
        let widthQuantity: Int = Int(paper.width / image.size.width)
        let heightQuantity: Int = Int(paper.height / image.size.height)
        
        print("Drawing origin points count [wide, height] : [\(widthQuantity), \(heightQuantity)]")
        
        UIGraphicsBeginImageContext(paper)
        
        for indexX in 0...widthQuantity-1 {
            for indexY in 0...heightQuantity-1 {
                print("add image into point : (\(indexX), \(indexY))")
                let point = CGPoint(x: imageW * indexX, y: imageH * indexY)
                let size = CGSize(width: image.size.width, height: image.size.height)
                image.draw(in: CGRect(origin: point, size: size))
            }
        }
        
        return UIGraphicsGetImageFromCurrentImageContext()
        
    }