iOS: First App from Apple

This entry is part 3 of 33 in the series iOS Apps

A video by Apple on how to build an iOS app in Swift language from scratch, in less than ten minutes.

Below is the source code and I am using the latest version of Swift.

import UIKit

class ViewController: UIViewController {

    @IBOutlet var photoImageView: UIImageView!
    let context = CIContext(options: nil)
    @IBAction func appFilter(sender: AnyObject) {
        let inputImage = CIImage(image: photoImageView.image!)
        let randomColor = [kCIInputAngleKey: (Double(arc4random_uniform(314))/100)]
        let filteredImage = inputImage?.imageByApplyingFilter("CIHueAdjust", withInputParameters: randomColor)
        let renderedImage = context.createCGImage(filteredImage!, fromRect: filteredImage!.extent)
        photoImageView.image = UIImage(CGImage: renderedImage)
    override func viewDidLoad() {
        // Do any additional setup after loading the view, typically from a nib.

    override func didReceiveMemoryWarning() {
        // Dispose of any resources that can be recreated.


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