Issue converting NSData to UIImage via Parse.com download - ios

Question

I'm having a strange issue. My app works fine in the iPhone 6 emulator, but not in any other emulators or on my iDevice. Here's the main code
query.findObjectsInBackgroundWithBlock {
(objects, error) -> Void in
if(error == nil){
let imageObjects = objects as! [PFObject]
if let myObjects = objects {
for object in myObjects {
let myTitle = object["imageName"] as! NSString
println(myTitle)
let thumbNail = object["imageFile"] as! PFFile
// println(thumbNail)
thumbNail.getDataInBackgroundWithBlock({
(imageData: NSData?, error: NSError?) -> Void in
if (error == nil) {
self.imageArray.append(imageData!)
let image = UIImage(data:imageData!)
self.imageView.contentMode = .ScaleAspectFit
self.imageView.image=image
}
})//getDataInBackgroundWithBlock - end
}//for - end
}
}//end of if
else{
println("Error in retrieving \(error)")
}
}//findObjectsInBackgroundWithblock - end
I think this line is the culprit
let image = UIImage(data:imageData!)
But I'm not sure why. "image" returns nil in all other devices except iPhone 6 emulator. Any suggestions would be awesome.
Thanks
NOTE: the image displays just fine in iPhone 6 emulator. I'm using storyboard and unchecked autolayout.

Answer 1

There shouldn't really be a situation where the app only works on one simulator setting. Resetting your simulator should solve the problem.

Answer 2

One possibility is that you previously successfully downloaded this data, and Parse has cached the response in your iPhone app, but you've since changed the PFObject remotely and removed the image data. Or perhaps changed code.
Because Parse.com caches images, it's possible that it works only on this device because of Parse.com caching.
You could use the debugger, or worse, NSLog to determine what is nil. You need to determine if imageData is coming back nil or not. Also, is there a reason why you're assuming imageData is non-null? I'm referring to references to imageData! -- that seems dangerous. Just because there's no error doesn't mean imageData is non-null.