I'm having trouble catching errors for this function

Question

I'm getting errors on the eight line "extra argument 'error'in call. Any suggestions?

@IBAction func loadFollowers(sender: AnyObject) {

    Twitter.sharedInstance().APIClient.sendTwitterRequest(Twitter.sharedInstance().APIClient.URLRequestWithMethod("GET", URL: "https://api.twitter.com/1.1/friends/ids.json", parameters: ["user_id":Twitter.sharedInstance().session()!.userID], error: nil), completion:
        {(response:NSURLResponse?, data:NSData?, error:NSError?) -> Void in

        var dic = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments, error: nil) as! NSDictionary
        var friends = dic["ids"] as! NSArray
        self.following = friends

            Twitter.sharedInstance().APIClient.sendTwitterRequest(Twitter.sharedInstance().APIClient.URLRequestWithMethod("GET", URL: "https://api.twitter.com/1.1/followers/ids.json", parameters: ["user_id":Twitter.sharedInstance().session()!.userID], error: nil), completion: {(resonse:NSURLResponse?,data:NSData?,error:NSError?) -> Void in

            var dic = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments, error: nil) as! NSDictionary
            var followers = dic["ids"] as! NSArray
            self.followers = followers
            for id in self.following {
                if !self.followers.containsObject(id)
                {
                    var st = id as! NSNumber
                    Twitter.sharedInstance().APIClient.loadUserWithID(st.stringValue, completion: {(user:TWTRUser?,error:NSError?) -> Void in
                        self.results.addObject(user!)
                        //self.tableView.reloadData()
                        print("done")
                    })
                }
            }

        })
    })}

var dic = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments, error: nil) as! NSDictionary — Davidi Tokuta, Mar 04 '16 at 19:42

score 2 · Answer 1 · answered Mar 04 '16 at 19:45

2

In Objective-C this used to be possible, now you have to do something like this:

do{
  let dict = try NSJSONSerialization.JSONObjectWithData(data!, options: .AllowFragments) as! NSDictionary
}catch let error{
  print(error)
}

answered Mar 04 '16 at 19:45

the_critic

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Tried it. Same error. – Davidi Tokuta Mar 04 '16 at 19:48
@DavidiTokuta did you remove the `error:` parameter ? – the_critic Mar 04 '16 at 19:49
by the way you have that line in line 3 and in line 9 in your code, so make sure you replace both of those. – the_critic Mar 04 '16 at 19:50
You mean the 'error: error' ? – Davidi Tokuta Mar 06 '16 at 06:14
Yes, remove the whole 'error: error' from those lines. The reason you can do that is because the error parameter has been removed from the parameter list of the method call in Swift in favor of exception handling. – the_critic Mar 06 '16 at 07:06
Great insight. Thanks a lot. I've got this other challenge with a Twitter app I'm building. I'm having some difficulty with the API calls. Can you help? – Davidi Tokuta Mar 06 '16 at 11:20
Sure, how do you want me to help ? you can either open a new question and link it here or if you want to contact me differently you can do that too... – the_critic Mar 06 '16 at 12:18
Contacting you directly would be good. How do we proceed? – Davidi Tokuta Mar 06 '16 at 12:29
Are you good with JSON? – Davidi Tokuta Mar 06 '16 at 12:38
Sure, I'll set up a temporary email address and let you know when I'm home – the_critic Mar 06 '16 at 12:44
Sounds great. Thanks!! – Davidi Tokuta Mar 06 '16 at 12:47
I set up an outlook account for Skype, you can find me by searching for `the__critic@outlook.com` I guess ? Drop me a message and let's see if that works! – the_critic Mar 07 '16 at 00:11
Great stuff. Will do now. – Davidi Tokuta Mar 07 '16 at 06:13

I'm having trouble catching errors for this function

1 Answers1