Twitter user image Parse - Swift - ios

Question

I'm trying to get user image from twitter(parse- twitter login) using this code :
if PFTwitterUtils.isLinkedWithUser(PFUser.currentUser()!) {
let screenName = PFTwitterUtils.twitter()?.screenName!
let requestString = NSURL(string: "https://api.twitter.com/1.1/users/show.json?screen_name=" + screenName!)
let request = NSMutableURLRequest(URL: requestString!, cachePolicy: .ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 5.0)
PFTwitterUtils.twitter()?.signRequest(request)
let session = NSURLSession.sharedSession()
session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
print(data)
print(response)
print(error)
if error == nil {
var result: AnyObject?
do {
result = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments)
} catch let error2 as NSError? {
print("error 2 \(error2)")
}
let names: String! = result?.objectForKey("name") as! String
let separatedNames: [String] = names.componentsSeparatedByString(" ")
//self.firstName = separatedNames.first!
//self.lastName = separatedNames.last!
let urlString = result?.objectForKey("profile_image_url_https") as! String
let hiResUrlString = urlString.stringByReplacingOccurrencesOfString("_normal", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)
let twitterPhotoUrl = NSURL(string: hiResUrlString)
let imageData = NSData(contentsOfURL: twitterPhotoUrl!)
let twitterImage: UIImage! = UIImage(data:imageData!)
self.userImg = UIImageView(image: twitterImage)
}
}).resume()
}
but it imageData is nil
let imageData = NSData(contentsOfURL: twitterPhotoUrl!)
let twitterImage: UIImage! = UIImage(data:imageData!)
twitterphotoUrl actually have the link
any help???

Answer 1

I would guess that you're getting an ATS exception from the pbs.twimg.com URL, so you're not getting the data, so you fall over when you force unwrap it. You should add that domain to the list of ATS exceptions as shown here, [documented here] (https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html) (search for NSExceptionDomain on that page) and discussed in many other places.
In addition to that, force unwrapping the results of URL calls is always a bad idea, since any number of things could prevent a data object being created. You should be using guard or if let statements in this case.

Answer 2

Try with below code,
if let imageData = NSData(contentsOfURL: twitterPhotoUrl!)
{
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.userImg.image = UIImage(image: imageData!)
})
}
Hope this will work