Retrieving objects from Parse iOS

Question

I am new to programming and am trying to develop an iOS app using Swift. However, I ran into a problem trying to retrieve previously saved information from Parse to use in my app.

To save the information I use the following code:

    var user = PFUser.currentUser()

    var number = self.phoneNumber.text as String
    var insta = self.instagramUsername.text as String
    var snapp = self.snapchatName.text as String
    var twitter = self.twitterHandle.text as String
    var bio = self.profileBio.text as String

    var socialData = PFObject(className: "socialData")

    socialData["phoneNumber"] = number
    socialData["instagram"] = insta
    socialData["snapchat"] = snapp
    socialData["twitter"] = twitter
    socialData["bio"] = bio
    socialData["user"] = user

    socialData.save()

This saves the information on Parse correctly but then when I try to retrieve the Instagram name or anything else specifically using a query I get an error. Here is how I have been trying to retrieve it:

    var user = PFUser.currentUser()

    var query = PFQuery(className:"socialData")
    query.whereKey("user", equalTo: user)
    query.findObjectsInBackgroundWithBlock {
        (objects: [AnyObject]!, error: NSError!) -> Void in
        if error == nil {
            // The find succeeded.

            // Do something with the found objects

            var socialData = PFObject(className: "socialData")


            let instaUsername = socialData["instagram"] as String

            println(instaUsername)


        } else {
            // Log details of the failure
            NSLog("Error: %@ %@", error, error.userInfo!)
        }
    }

The logs say fatal error: unexpectedly found nil while unwrapping an Optional value. After the app crashes. Yet, the information is correctly displayed on Parse. Any help is greatly appreciated, thanks!

inside the closure you are creating a new (empty) socialData object - you should retrieve the object from the objects array — Paulw11
– Paulw11, Commented Dec 1, 2014 at 0:42

Lyndsey Scott · Accepted Answer · 2014-12-01 00:55:09Z

3

Remove this line within your findObjectsInBackgroundWithBlock block entirely:

var socialData = PFObject(className: "socialData")

and replace this line:

let instaUsername = socialData["instagram"] as String

with this:

let instaUsername = objects[0]["instagram"] as String

so you're actually utilizing the object array retrieved from the query, accessing the first object which matches the current user, then getting the "instagram" key's stored value from that PFObject dictionary.

edited Dec 1, 2014 at 0:55

answered Dec 1, 2014 at 0:45

Lyndsey Scott

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