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October 14, 2009
9:10 am | tech | 5 comments message sectionOffset sent to freed object

Pardon the relatively technical post, but I want to document this problem somewhere in hopes that it saves someone the frustration it caused me.

I’ve been experimenting with iPhone development lately. For the most part, it’s been a fun learning process despite the quirks that Xcode, IB, and Obj-C throw at an MS developer. Objective-C is, at worst, a 20-year-old hack that follows few conventions established by most other OO languagues.

My most recent lesson has been adapting my project to use Core Data for persistence. Early on, I kept receiving the error “message sectionOffset sent to freed object” when trying to load a connected table.

I found the solution nowhere online, and the exception is not at all helpful. For me, the problem was that I was trying to access the FetchedResultsController before performFetch had been called. Adding performFetch to my viewDidLoad fixed the issue, and I was on my way. My iPhone app is on its way.

Comments

Nick,

UGH!!!!!!!!

Thanks a bunch! Now I’m on my way again after several VERY frustrating hours!!!

Ladd

Ladd | November 2nd, 2009 at 2:06 pm

Awesome, Ladd. Glad I could help.

Nick | November 17th, 2009 at 1:46 pm

yes, it did happen to me to. after seeing this post, I was back on track…

thanks!

kitschmaster | November 20th, 2009 at 4:03 am

How did you add the preform fetch to viewdidload(), sorry this question is coming from a noob.

Ryan | November 30th, 2009 at 7:45 am

Ryan, I have the following code in my viewDidLoad:

NSError *error;
if (![self.fetchedResultsController performFetch:&error])
  NSLog(@"Fetch error: %@", [error domain]);
Nick | January 4th, 2010 at 7:14 pm

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