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PORemoving UIScrollView subviews assistance
 

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  1. PORemoving UIScrollView subviews assistance
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    <p>I'd like some assistance to properly remove subviews from a scrollview, to reduce memory usage. Every time the user scrolls, I ask to grab page, page -1 and page+1 to get the views loaded in the scrollview.</p> <p>Now my issue is that if there's ten views side by side, when you reach the tenth view, all the previous 9 views are still subviews in the scrollview and in memory. I'd like to reverse load these views as well. Here's what I have so far:</p> <pre><code>- (void)loadScrollViewWithPage:(int)page { if (page &lt; 0) return; if (page &gt;= [self favouritesCount]) return; // replace the placeholder if necessary MyObject *myObj = (MyObj *)[fetchedResultsController objectAtIndexPath:[NSIndexPath indexPathForRow:page inSection:0]]; MyView *controller = [viewControllers objectAtIndex:page]; if ((NSNull *)controller == [NSNull null]) { controller = [[MyView alloc] initWithObject:myObj]; controller.delegate = self; [viewControllers replaceObjectAtIndex:page withObject:controller]; } // add the controller's view to the scroll view if (nil == controller.superview) { CGRect frame = scrollView.frame; frame.origin.x = frame.size.width * page; frame.origin.y = 0; controller.frame = frame; [scrollView addSubview:controller]; } } </code></pre> <p>Now I have tried something like:</p> <pre><code>if (page &gt; 2) { [(UIView *)[[scrollView subviews] objectAtIndex:(page - 2)] removeFromSuperview]; } </code></pre> <p>But that just crashes it. It's probably a simple solution, so help is appreciated :)</p>
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