marchinram

import UIKit

extension UIColor {
    class func randomColor() -> UIColor {
        let red = CGFloat(arc4random() % 256) / 256.0
        let green = CGFloat(arc4random() % 256) / 256.0
        let blue = CGFloat(arc4random() % 256) / 256.0
        let alpha = CGFloat(arc4random() % 256) / 256.0
        return UIColor(red: red, green: green, blue: blue, alpha: alpha)
    }

marchinram

import UIKit

extension UIImage {
    subscript (x: Int, y: Int) -> UIColor? {
        guard x >= 0 && x < Int(size.width) && y >= 0 && y < Int(size.height),
            let cgImage = cgImage,
            let provider = cgImage.dataProvider,
            let providerData = provider.data,
            let data = CFDataGetBytePtr(providerData) else {
            return nil