     override func viewDidLoad() {
         super.viewDidLoad()
         assert(assetGroup != nil, "assetGroup is nil")
-        
+
         self.title = assetGroup.groupName
         
         self.collectionView?.backgroundColor = UIColor.whiteColor()

        })
    }
    
    // MARK: - Delegate methods
    func onCancelClicked() {
        if let delegate = self.delegate {
            delegate.imagePickerControllerCancelled()
        }
    }
    
    // MARK: - UITableViewDelegate, UITableViewDataSource methods
    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1

        
        self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: GroupCellIdentifier)
        self.view.backgroundColor = UIColor.whiteColor()
        
        library.enumerateGroupsWithTypes(0xFFFFFFFF, usingBlock: {(group: ALAssetsGroup! , stop: UnsafeMutablePointer<ObjCBool>) in
            if group != nil {
