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Editorial Team
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Asked: 2026-06-12T15:32:02+00:00

My app(arc, ios5) sometimes will crash after I take a photo and save to

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My app(arc, ios5) sometimes will crash after I take a photo and save to CoreData. Using Instruments I found that there are memory warnings before crash, so I tried to find out how memory is used.

My app stores trips in CoreData (totally 200MB), each trip has hundreds of CLLocation objects and tens of UIImage objects.

Each time I view one trip details by pushViewController, the memory usage grows up; but after I popViewController, the memory usage remains.

I think there are several suspects:

  1. the CoreData cache, but I don’t know how to purge it;
  2. the detail view controllers, since I didn’t see any viewDidUnload called after each popViewController;

After some tests, I was confused that even if I call viewDidUnload manually, the memory usage remains.

I also tested memory leaks instrument in ios5.0 simulator for my app, it’s clean.

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1 Answer

  1. Editorial Team

    It is not advised to store images in coredata due to memory issues. Check if you can store it in document folder or so and store the image name/path in your coredata. Most of the cases that should resolve memory issues.

    Here are a few posts about this CoreData (for iphone) storing images and Core Data – Storing Images (iPhone)

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