variable from a for in array that won't display on my collection view swift

        //  ViewController.swift
        //  Fashun
        //
        //  Created by Alex Macleod on 20/10/14.
        //  Copyright (c) 2014 Alex Macleod. All rights reserved.
        //

        import UIKit

        class ViewController: UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {

            var collectionView: UICollectionView?

            var instanceOfCustomObject: CustomObject = CustomObject()
            var accessToken: NSString!
            var userDefaults: NSUserDefaults!

            // the range represents integer values 0, 1, and 2
            // the range now represents integer values 6, 7, and 8

            let colorWheel = ColorWheel()
            var photoCount: Int! = 0
            var photos: UIImage! = UIImage()

        //    private let api = "d4984c8cfa78689bd066d82bec820fd5"



            override func viewDidLoad() {
                super.viewDidLoad()

                userDefaults = NSUserDefaults.standardUserDefaults()
                self.accessToken = userDefaults!.objectForKey("accessToken") as NSString
                println(self.accessToken)

                //        instanceOfCustomObject.someProperty = "Hello World"
        //        var accessToken : NSString? = NSString(instanceOfCustomObject.accessToken)
        //        println(accessToken)
        //        instanceOfCustomObject.authorize()
        //        instanceOfCustomObject.simpleAuth()


                // Do any additional setup after loading the view, typically from a nib.
                let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
        //        layout.sectionInset = UIEdgeInsets(top: 20, left: 0, bottom: 0, right: 0)
                layout.itemSize = CGSize(width: 124, height: 124)
                layout.minimumInteritemSpacing = 1.0
                layout.minimumLineSpacing = 1.0
                collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
                collectionView!.dataSource = self
                collectionView!.delegate = self
                collectionView!.registerClass(Cell.self, forCellWithReuseIdentifier: "Cell")
                collectionView!.backgroundColor = UIColor.whiteColor()
                self.view.addSubview(collectionView!)

                getData()

            }

            func getData() -> Void {
                let baseUrl = NSURL(string:"https://api.instagram.com/v1/users/3/media/recent/?access_token=\(self.accessToken)")

                let forcastUrl = NSURL(string: "", relativeToURL: baseUrl)

                //        let data = NSData(contentsOfURL: forcastUrl)
                //        println(data)
                let sharedSession = NSURLSession.sharedSession()
                let downloadTask: NSURLSessionDownloadTask = sharedSession.downloadTaskWithURL(baseUrl, completionHandler: { (location: NSURL!, response: NSURLResponse!, error: NSError!) -> Void in


                    //            var urlContents = NSString.stringWithContentsOfURL(location, encoding: NSUTF8StringEncoding, error: nil)
                    //            println(urlContents)

                    let dataObject = NSData(contentsOfURL: baseUrl)
                    //            println(dataObject)
                    if (error == nil) {
                        let responseDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject, options: nil, error: nil) as NSDictionary

                        var currentResponse = responseDictionary.valueForKeyPath("data.images.standard_resolution.url") as NSArray
    //                    println(currentResponse)

                        for url in currentResponse {
                            var urls: NSString = url as NSString
    //                        println(images)
                            var photoUrls = NSURL.URLWithString(urls)

                            var err: NSError?
                            var imageData :NSData = NSData.dataWithContentsOfURL(photoUrls,options: NSDataReadingOptions.DataReadingMappedIfSafe, error: &err)
                            var photos = UIImage(data:imageData)
                        }


                        //                println(currentResponse)
                        //                self.currentResponse = currentResponse as NSArray
    //                    self.photoCount = currentResponse.count as Int
    //                    println(self.photoCount)

                        dispatch_async(dispatch_get_main_queue(), { () -> Void in
                            self.photoCount = currentResponse.count as Int!
                            self.collectionView!.reloadData()
                            //                    self.temperatureLabel.text = "\(currentWeather.temperature)"
                            //                    self.iconView.image = currentWeather.icon!
                            //                    self.currentTimeLabel.text = "At \(currentWeather.currentTime!) it is"
                            //                    self.humidityLabel.text = "\(currentWeather.humidity)"
                            //                    self.percipitationLabel.text = "\(currentWeather.precipProbability)"
                            //                    self.summeryLabel.text = "\(currentWeather.summary)"
                            //
                            //                    self.refreshActivityIndicator.stopAnimating()
                            //                    self.refreshActivityIndicator.hidden = true
                            //
                            //                    self.refreshButton.hidden = false
                        })

                    } else {

                        let networkIssueController = UIAlertController(title: "Error", message: "I got 99 problems but a bitch ain't one", preferredStyle: .ActionSheet)
                        let okButton = UIAlertAction(title: "OK", style: .Default, handler: nil)
                        networkIssueController.addAction(okButton)
                        let cancelButton = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
                        networkIssueController.addAction(cancelButton)

                        self.presentViewController(networkIssueController, animated: true, completion: nil)

                        dispatch_async(dispatch_get_main_queue(), { () -> Void in
                            //Stop refresh animation
                            //                    self.refreshActivityIndicator.stopAnimating()
                            //                    self.refreshActivityIndicator.hidden = true
                            //                    self.refreshButton.hidden = false

                        })

                    }

                })

                downloadTask.resume()

            }

            return cell
        }
    }

You can see in this collectionview function I am trying to display the images by assigning my photos variable (my loops of urls now UIImages) to the imageView cell. Nothing happens I just get a white screen on my IOS simulator but my print statement prints out all the images I am trying to display!

Thanks in advance.