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POPageViewController: How to release ViewControllers added to it?
 

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    <p>I have a problem with the new PageViewController (the one with the nifty page turn animations). As far as I understand, there is a stack of ViewControllers which you need to set up like so:</p> <pre><code>PageView *startingViewController = [self.modelController viewControllerAtIndex:0]; NSArray *viewControllers = [NSArray arrayWithObject:startingViewController]; [self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:NULL]; </code></pre> <p>So far so good. Then you need to set up a source (your model Controller). In your model controller, you need to have four methods:</p> <pre><code>-(PageView *)viewControllerAtIndex:(NSUInteger)index -(NSUInteger)indexOfViewController:(PageView *)viewController -(UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController -(UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController </code></pre> <p>The last two are called if you turn the page (to the next or the previous). The second one simply determines the page index number. The interesting one - and the one where my problem is - is the first one. The first one returns a ViewController (which in my example is called PageView). This is the very end of the method:</p> <pre><code>PageView *pView = [[PageView alloc] init]; return pView; </code></pre> <p>I am wondering where this pView ends up and how I can release it? I guess autorelease is a bad idea as I don't know how long it is needed. If it ends up in the stack (which I guess it does), how long is it needed? Surely just for the next couple of pages. For instance, imagine setting up a pView for page 1. You then turn to page 2 and 3. By then you don't need page 1 anymore - you could release it. If you go back to page 1 it will be reloaded.</p> <p>I put log commands in my pView dealloc, but it is never called. So I guess I'm leaking every single viewControllers I've created.</p> <p>Any ideas how and where to release them once they are not needed anymore?</p>
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