how to create code for taking photo

success as a part of project.
http://www.ioscreator.com/tutorials/take-photo-tutorial-ios8-swift
still struggling with this though ( http://www.techotopia.com/index.php/An_Example_Swift_iOS_8_iPhone_Camera_Application)

import UIKit

var imagePicker: UIImagePickerController!

class ViewController: UIViewController ,UINavigationControllerDelegate, UIImagePickerControllerDelegate{

    @IBOutlet var imageView: UIImageView!

    

    @IBAction func takePhoto(sender: UIButton) {

        imagePicker = UIImagePickerController()

        imagePicker.delegate = self

        imagePicker.sourceType = .Camera

        

        presentViewController(imagePicker, animated: true, completion: nil)

        

    }

    

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject :AnyObject]){

    imagePicker.dismissViewControllerAnimated(true, completion: nil)

    imageView.image = info [UIImagePickerControllerOriginalImage] as? UIImage

    }

    

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}