Universal Link Implementation

  
    // implementation based on http://blog.hokolinks.com/how-to-implement-apple-universal-links-on-ios-9/
    @available(iOS 8.0, *)
    func application(application: UIApplication, continueUserActivity userActivity: NSUserActivity, restorationHandler: ([AnyObject]?) -> Void) -> Bool {
        if userActivity.activityType == NSUserActivityTypeBrowsingWeb {
            checkURL(userActivity.webpageURL!.absoluteString)
        }
        return true
    }
    
    func checkURL (entireURL: String) {
        var imageURLs = [String]()
        var logoURL : String = ""
        var title : String = ""
        var url : String = ""
        //ASSUMPTION: "=" and "&" are not valid parts of urls and names
      let query = NSURL(string: entireURL)!.query!
      let arrQuery = query.componentsSeparatedByString("&")
        for part in arrQuery {
            var nameAndValue = part.componentsSeparatedByString("=")
            if(nameAndValue[0] == "image_url" || nameAndValue[0] == "image_urls" ) {
                imageURLs = nameAndValue[1].componentsSeparatedByString(",")
            } else if(nameAndValue[0] == "logo_url") {
                logoURL = nameAndValue[1];
            } else if(nameAndValue[0] == "title") {
                title = nameAndValue[1].stringByRemovingPercentEncoding!;
            } else if(nameAndValue[0] == "referer") {
                url = nameAndValue[1].stringByRemovingPercentEncoding!;
            }
        }
        
        
        
        
        let vc = self.window!.rootViewController as! MainViewController
        
        
        if vc.isViewLoaded() {
            vc.loadProduct(["logo_url":logoURL,"title":title,"image_urls":imageURLs,"url":url])
        } else {
            startedWithProduct = ["logo_url":logoURL,"title":title,"image_urls":imageURLs,"url":url]
        }
    }