Why is the image not being added to the array?

Question

I'm trying to append images retrieved from parse database, but nothing is being added to the UIImage array. How do I append the retrieved images?

 var arrayOfFriends: [UIImage] = []

 func getFriendPic(){

    var imagequery = PFQuery(className: "_User")
    imagequery.findObjectsInBackgroundWithBlock {( objects: [AnyObject]?, error: NSError?) -> Void in
        for object in objects!{
            let userPic = object["ProPic"] as! PFFile
            userPic.getDataInBackgroundWithBlock({ (imageData: NSData?, error: NSError?) -> Void in
                if(error == nil){
                    let image = UIImage(data: imageData!)
                    //breakpoint placed on line below, but app crashes with array out of bounds.
                    self.arrayOfFriends.append(image!)
                    print(self.arrayOfFriends)
                }
                dispatch_async(dispatch_get_main_queue()) {
                    self.collectionView.reloadData()
                }
            })

        }
    }
}

Have you stepped through with the debugger to see what is happening in your code? — Paulw11, Oct 26 '15 at 20:59
Yes, but does your `imageQuery` return any objects? Does the `getDataInBackgroundWithBlock` return any data? — Paulw11, Oct 26 '15 at 21:06
Does the breakpoint in line 50 trigger? I would suggest your log your error if it isn't nil — Paulw11, Oct 26 '15 at 21:16
`Array out of bounds` error occurs before reaching the breakpoint — xxtmanxx, Oct 26 '15 at 21:17
It would be a good idea to add that information to your question. What line does that happen on? It is likely that you have a problem with multi-threading. Array access isn't thread safe, and you are updating the array from multiple threads as well as reloading the collection view repeatedly — Paulw11, Oct 26 '15 at 21:19

score 0 · Answer 1 · edited May 23 '17 at 11:58

0

The code was not the problem, it was Xcode, here is the solution to anybody who has the same problem. The resource could not be loaded because the App Transport Security policy requires the use of a secure connection

edited May 23 '17 at 11:58

Community

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answered Oct 26 '15 at 22:52

xxtmanxx

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Why is the image not being added to the array?

1 Answers1