UIView extension which allows to get colour of any point inside

UIView+GetColor.swift

//
//  UIView+GetColor.swift
//  SwiftPick
//
//  Created by Maciej Banasiewicz, Michał Apanowicz on 06/07/14.
//
//

import UIKit

extension UIView {
    func getColourFromPoint(point:CGPoint) -> UIColor {
        let colorSpace:CGColorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo.fromRaw(CGImageAlphaInfo.PremultipliedLast.toRaw())!
        
        var pixelData:UInt8[] = [0, 0, 0, 0]
        
        let context = CGBitmapContextCreate(&pixelData, 1, 1, 8, 4, colorSpace, bitmapInfo)
        CGContextTranslateCTM(context, -point.x, -point.y);
        self.layer.renderInContext(context)
        
        var red:CGFloat = CGFloat(pixelData[0])/CGFloat(255.0)
        var green:CGFloat = CGFloat(pixelData[1])/CGFloat(255.0)
        var blue:CGFloat = CGFloat(pixelData[2])/CGFloat(255.0)
        var alpha:CGFloat = CGFloat(pixelData[3])/CGFloat(255.0)
        
        var color:UIColor = UIColor(red: red, green: green, blue: blue, alpha: alpha)
        return color
    }
}

What are the license terms of your code?

I ran the code below on Swift 5 that is working very well. Thank you blogger!

    func getColourFromPoint(point:CGPoint) -> UIColor {
        let colorSpace:CGColorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
        
        var pixelData:[UInt8] = [0, 0, 0, 0]
        let context = CGContext(data: &pixelData, width: 1, height: 1, bitsPerComponent: 8, bytesPerRow: 4, space: colorSpace, bitmapInfo: bitmapInfo.rawValue)
        context?.translateBy(x: -point.x, y: -point.y)
        if let _context = context {
            self.layer.render(in: _context)
        }
        let red:CGFloat = CGFloat(pixelData[0]) / CGFloat(255.0)
        let green:CGFloat = CGFloat(pixelData[1]) / CGFloat(255.0)
        let blue:CGFloat = CGFloat(pixelData[2]) / CGFloat(255.0)
        let alpha:CGFloat = CGFloat(pixelData[3]) / CGFloat(255.0)
        
        return UIColor(red: red, green: green, blue: blue, alpha: alpha)
    }