imagepicker usage example

import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    @IBOutlet weak var photoImageView: UIImageView!;
    var imagePicker = UIImagePickerController();
        override func viewDidLoad() {
        super.viewDidLoad();
        //to use that must inherit: UINavigationControllerDelegate & UIImagePickerControllerDelegate
        imagePicker.delegate=self;
                imagePicker.sourceType = .SavedPhotosAlbum;//where to pick an image from, you can use also: .Camera & .PhotoLibrary
    }
    @IBAction func selectImageFromPhotoLibrary(sender: UITapGestureRecognizer) {
                presentViewController(imagePickerController, animated: true, completion: nil)
    }
        //called when user actually picks some image
    func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
        photoImageView.image = image;
        dismissViewControllerAnimated(true, completion: nil);//finish picking
    }
 }