Swift 3 - Xcode Playground Code

UIImageFunExtensions.swift

//: Playground - noun: a place where people can play

import UIKit
import PlaygroundSupport

var str = "Hello, playground"


extension UIImage {
    class func circle(diameter: CGFloat, color: UIColor) -> UIImage? {
        UIGraphicsBeginImageContextWithOptions(CGSize(width: diameter, height: diameter), false, 0)
        guard let context = UIGraphicsGetCurrentContext() else { return nil }

        context.saveGState()
        let rect = CGRect(x: 0, y: 0, width: diameter, height: diameter)
        context.setFillColor(color.cgColor)
        context.fillEllipse(in: rect)
        context.restoreGState()
        let image = UIGraphicsGetImageFromCurrentImageContext()

        return image
    }

    class func xImage(width: CGFloat, color: UIColor, weight: CGFloat = 3.0) -> UIImage? {
        UIGraphicsBeginImageContextWithOptions(CGSize(width: width, height: width), false, 0)
        guard let context = UIGraphicsGetCurrentContext() else { return nil }

        context.saveGState()
        context.setStrokeColor(color.cgColor)
        context.setLineCap(CGLineCap.round)
        context.setLineWidth(weight)
        let adjustedX: CGFloat = 0.0+weight
        let adjustedY: CGFloat = width-weight
        context.move(to: CGPoint(x: adjustedX, y: adjustedX))
        context.addLine(to: CGPoint(x: adjustedY, y: adjustedY))
        context.move(to: CGPoint(x: adjustedX, y: adjustedY))
        context.addLine(to: CGPoint(x: adjustedY, y: adjustedX))
        context.strokePath()
        context.restoreGState()

        let image = UIGraphicsGetImageFromCurrentImageContext()

        return image
    }
}

let view = UIView(frame: CGRect(x: 50, y: 50, width: 300, height: 600))
view.backgroundColor = UIColor.white
let xSize: CGFloat = 75
let xImage = UIImage.xImage(width: xSize, color: UIColor.blue, weight: 10)
let circle = UIImage.circle(diameter: 30, color: UIColor.red)

let imageView = UIImageView(image: xImage)
imageView.contentMode = .center
let circleImageView = UIImageView(image: circle)
circleImageView.contentMode = .center
view.addSubview(imageView)
view.addSubview(circleImageView)
UIView.animate(withDuration: 2.0, delay: 2.0, options: .curveEaseInOut, animations: {
    imageView.frame.origin = CGPoint(x: 100, y: 300)
    circleImageView.frame.origin = CGPoint(x: 50, y: 400)
}, completion: nil)

PlaygroundPage.current.liveView = view