Create a unique identifer in a webview - ios

Question

Go easy on me I am new to I OS and Swift :). I am trying to create a IOS app using swift. I have a web view display that is working correctly, displaying the website. YAY!!
What I need to do now is create a unique identifier that is stored locally and when the app is opened is sent to the remote server. I see i can use this...
UIDevice.currentDevice().identifierForVendor!.UUIDString
However i would like to store it locally for future use and send it to the remote server every time the app is opened. I have done research on this and have come upon answers for other objects just not a web view.
If someone knows of a tutorial or example code for this solution i would greatly appreciate it.
UPDATE
let uuid = UIDevice.currentDevice().identifierForVendor!.UUIDString
and for the url im using
let url= NSURL (string:"https://example.com");
Could i do something like this? Or like it?
let url= NSURL (string:"https://example.com");
let requestobj= NSURLRequest(URL:url! ADD VAR HERE? );
Where ADD VAR HERE is the uuid to pass to the server which i can catch with a php script?
Latest update..
Im having a hard time integrating that into my existing code. Where would be the best place to put it?
import UIKit
class ViewController: UIViewController {
let uuid = UIDevice.currentDevice().identifierForVendor!.UUIDString
#IBOutlet weak var WebView: UIWebView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let url = NSURL (string: "https://example.com");
let requestObj = NSURLRequest(URL: url?)
WebView.loadRequest(requestObj);
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 1

Here is the answer i was looking for. Thanks for your help everyone!
let device_uuid = UIDevice.currentDevice().identifierForVendor!.UUIDString
let api_host = "https://example.com?uuid=" + device_uuid
let url = NSURL(string: api_host)
let req = NSURLRequest(URL: url!)
WebView.loadRequest(req);
Apparently what i needed to do was build my URL into a variable. Then i can structure it using the NSURL and use it from there. This guide helped me. Just ignore the ruby on rails part if that's not what your doing.
http://ericlondon.com/2015/12/09/sending-messages-between-a-swift-webview-and-a-rails-backend-using-javascript.html

Answer 2

You will need to check on the webserver side to confirm exactly what you need to pass in - but if you are developing that side as well, then you should have control :-)
Should be something like this - please not that you don't need ; in swift
let request= NSURLRequest(URL:url)
var bodyData = "myUUID=\(uuid)&otherData=value1"
request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding);

Answer 3

Keep in mind that this identifier will change if a user uninstalls the application. If you need to persist it then I'd recommend to store it on the keychain so the id is always the same for the same phone even if the app is uninstalled.
Check this other question: How to preserve identifierForVendor in ios after uninstalling ios app on device?