How can I retrieve local files with NSURL?

You are trying to load a file from your file system, not from web.

For creating the NSURL you need to use fileURLWithPath: class method.

Change your method like:

Swift 2

override func viewDidLoad(){    super.viewDidLoad()    var urlpath     = NSBundle.mainBundle().pathForResource("bpreg", ofType: "xml")    let url:NSURL   = NSURL.fileURLWithPath(urlpath!)!    parser          = NSXMLParser(contentsOfURL: url)!    parser.delegate = self    parser.parse()}

Swift 3

override func viewDidLoad(){    super.viewDidLoad()    let urlpath     = Bundle.main.path(forResource: "bpreg", ofType: "xml")    let url         = NSURL.fileURL(withPath: urlpath!)    parser          = XMLParser(contentsOf: url)!    parser.delegate = self    parser.parse()}

Note: In Swift 3 you can also use the URL class to construct the url instead of NSURL class. So the above code for constructing url changes to:

let url = URL(fileURLWithPath: urlpath!)

You should use URLForResource(_:withExtension:) instead of pathForResource:

let fileUrl = Bundle.main.url(forResource: "bpreg", withExtension: "xml")

Your file doesn't exist in your main-bundle yet.

You have to add the file your are using to your Bundle Resource.

So to add it. Go to App Target -> Build Phases and check the Bundle Resource and add it by drag n' drop.