// AppDelegate
func xmppvCardTempModule(vCardTempModule: XMPPvCardTempModule, didReceivevCardTemp vCardTemp: XMPPvCardTemp, forJID jid: XMPPJID) {
    var base64OfImage: String = vCardTemp.elementForName("PHOTO").stringValue()
}

// Controller
let jIDis = XMPPJID.jidWithString(onlineBuddies[indexPath.row] as? String)

let photoData: NSData = self.xmppvCardTempModule!.fetchvCardTempForJID(jIDis) as! NSData
cell.avatarImage.image = UIImage(data: photoData)