Solving iPhone/iPad out of memory issues

Question

I have a strange issue where I'm scrolling through a paged UIScrollView which displays the pages of a PDF document (using Quartz 2D and CATiledLayer). When I page through memory allocation looks fine with it going up with a few initial pages and then keeping it steady as it obviously releases the memory kept for earlier pages. Upon hitting page x (not a certain PDF page or a certain number per se) memory usage goes from a couple of megs to 308 megs and the app crashes.

So my question is: how to best try to find what's causing this? The object alloc tool in instruments shows the memory as simply going to malloc. (in huge chunks).

Answer 1

Hello I m also having memory issues, and can't find any solution for 3 weeks now. I m having memory issue and my pdf reader crashes on device. I used CATiledLayer to display pdf (because zooming is perfect with this method). My question is how do you swap between pages and release previous pages without increasing the memory use ??

what I did is :

• controllerView 1: display page 1
• controllerView 2: display page 2
• controllerView 3: display page 3

I don' t know how to recycle objects

Thanks in advance

Answer 2

Where can I find details on Apple's code that causes me usage to go crazy