Deallocation when iPhone is turned back on from sleep and app is still open

There are a few instances where my app crashes when turned back on from sleep and the app is still open. It happens if a UITableViews is open when the iPhone is put into sleep; the table is being filled from an XML being parsed. I understand why it is crashing; in my viewDidUnload method I am releasing the array that is filling the table. How to handle this I am not sure; yes I could simply not release it in viewDidUnload, but then it would never leave memory if 开发者_JAVA百科you returned to the main menu.

Any help would be appreciated!

The method viewDidUnload is not the right place to release your data if at all. I quote Apple's documentation, which desribes it better than I could:

This method is called as a counterpart to the viewDidLoad method. It is called during low-memory conditions when the view controller needs to release its view and any objects associated with that view to free up memory. Because view controllers often store references to views and other view-related objects, you should use this method to relinquish ownership in those objects so that the memory for them can be reclaimed. You should do this only for objects that you can easily recreate later, either in your viewDidLoad method or from other parts of your application. You should not use this method to release user data or any other information that cannot be easily recreated.

ViewDidUnload is used only to release view related objects. A view controller can release its view because its not shown, still your instance of that controller exists and so does your model.