StackOverflow2013

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POrelease or not release a controller
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copied!<p>First of all, sorry for my english (I'm spanish) and for being a newbie. I am developing my second iPad app for learnign and I am having problems with the memory management. I am facing this problem for about a month now, so I have thought that maybe some expert in this great community could help me a bit. </p> <p>My scenario is: </p> <p>It is a simple e-book app. I have a main view from which the user can open two modal views. The main issue is in one of the modal views. In there I have a scrollview that manages all the pages. Right now, there are 12 pages. I have tried to release everything, etc, but something remains in memory, because in instruments memory keeps growing and when I dissmiss the modal view and come back, after a few times, it crashes. The pages are separate xibs and I load them with this method:</p> <pre><code> - (void)loadScrollViewWithPage:(int)page { if (page < 0) return; if (page >= MyNumberOfPages) return; if ((NSNull *)controller != [NSNull null]) { NSString *className = [NSString stringWithFormat:@"Pagina%d", page]; Class myClass = NSClassFromString(className); controller = [[myClass alloc] initWithNibName:className bundle:nil]; // I have tried autorelease and even retain] autorelease. [viewControllers replaceObjectAtIndex:page withObject:controller]; CGRect frame = scrollView.frame; frame.origin.x = frame.size.width * page; frame.origin.y = 0; controller.view.frame = frame; if (page != 0){ controller.view.tag = page; }else { controller.view.tag = 9999; } [scrollView addSubview:controller.view]; [scrollView sendSubviewToBack:controller.view]; [controller release]; } } </code></pre> <p>I load 3 pages each time, the one visible and left and right ones. I try to unload (remove or get rid of) them this way (for the ones around the 3 loaded):</p> <pre><code>[viewControllers removeObjectAtIndex:pagi - 2]; [[scrollView viewWithTag:pagi - 2] removeFromSuperview]; </code></pre> <p>So I have two problems... If I release the controller as I am doing in the method above, my IBActions in some pages crash the app. But If I release it anyway, and remove IBActions, the memory keeps growing too. In Instruments, it shows no leaks, but it crashes after growing 1mb or 2mb of memory.</p> <p>I have logued all the pages viewDidUnload and deallocs and they unload only when there is a memory warning. </p> <p>Finally, what is more strange for me, is that if I don't use [controller release]; the apps stays more time without crashing. But of course, they don't dealloc.</p> <p>I think that the problem may be in this method, but if it helps, I could upload more parts of the code. It's just to don't make it too long here.</p> <p>Any idea?</p>

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