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    <p>More code would be helpful but here are some suggestions:</p> <ol> <li><p>Check if <code>startUploads</code> is being called before the view is loaded. The view will only be loaded when it is accessed for the first time to be added to a superview.</p></li> <li><p>Consider initializing <code>processList</code> in your <code>init</code> method instead of <code>viewDidLoad</code> both to solve #1 and b/c the view can loaded &amp; unloaded by iOS independently of the lifecycle of the viewController (depending on what other views you are displaying and whether any memory warnings occur).</p></li> <li><p>Make sure you are releasing <code>processList</code> in <code>dealloc</code>. You only need to release it in <code>viewDidUnload</code> if it is recreated and loaded in <code>viewDidLoad</code>.</p></li> </ol> <p>Your code sample doesn't show when <code>startUploads</code> is being called and you aren't adding any items to <code>processList</code> so it's hard to tell if the above is relevant. Post some more code and I'll revise my answer accordingly.</p> <p>good luck!</p> <p>[EDIT: added example code]</p> <p>The code fragments you posted are not a complete implementation of a view controller and the associated objects that interact with it. Given the code I have seen, your application design does not conform to MVC (Model/View/Controller) design pattern and I would be doing things a bit differently. However, I don't want to make assumptions about code I haven't seen or your ultimate intent or ability as a developer. I can't write your app for you, just trying to directly help you with the specific question you asked regarding why your NSMutableArray property remains null after the <code>startUploads</code> action completed. With that in mind, here are my edits to the code you posted:</p> <p>processViewController.m - add the following:</p> <pre><code>- (id)initWithNibNamed:(NSString *)nibName bundle:(NSBundle *)bundle { self = [super initWithNibNamed:nibName bundle:bundle]; if (self) { processList = [[NSMutableArray alloc] init]; } return self; } - (void)dealloc { self.processList = nil; [super dealloc]; } </code></pre> <p>different.m</p> <pre><code>- (void)displayProcessVC { ProcessViewController *processVC = [[ProcessViewController alloc] initWithNibNamed:@"processView.xib" bundle:nil]; NSLog(@"Different:displayProcessVC BEFORE STARTING UPLOAD, processList = %@", processVC.processList); [processVC startUploads]; NSLog(@"Different:displayProcessVC AFTER STARTING UPLOAD, processList = %@", processVC.processList); // would normally present process VC here [processVC release]; } </code></pre> <p>Hope this helps.</p>
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    1. COok, so my answer is valid. your problem looks like #2. You need to allocate `processList` in `initWithNibName:`, not in `viewDidLoad`. The view is not loaded yet when `startUploads` is called. Your example doesn't make much sense b/c you are initializing processTable and never presenting it. `processViewController` would typically be presented modally or pushed onto a navigation controller before being released.
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    2. COOk, so if I do it like this: `processTable.processList = [[NSMutableArray alloc] init];`, it won't work. When the viewDidLoad it opened, it outputs NULL in the console. I also put it in my `-(id)init { processList = [[NSMutableArray alloc] init]; }` and it doesn't get called when ever `startUploads` does (put a NSLog the init and it doesn't show up until the view is opened).
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    3. COWhen I said to consider initializing processList in your init method I didn't literally mean `-(id)init`. In this case you are using `-(id)initWithNibName:` so you need to do it there. Override the superclass implementation and initialize `processList` there. I recommend reading Apple's View Controller Programming Guide and specifically the sections on the View Controller life cycle.
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