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copied!<p>No, you dont have to do that. Just release <code>viewController</code> and it will release all of its <code>subviews</code> internally. Rest will be taken care by framework.</p> <p>If you are not using ARC, your code will look like this,</p> <pre><code>UIViewController *viewController = [[UIViewController alloc] init]; UIView *view1 = [[UIView alloc] init]; [viewController.view addSubview:view1]; [view1 release]; [viewController release]; </code></pre> <p>Since you have allocated both <code>viewController</code> and <code>view1</code> once, you have to release it once as shown above. You dont have to do a release again since you are not doing any <code>retain</code> on this after that.</p> <p>If you do this,</p> <pre><code>UIView *view = (UIView *)[[viewController.view subviews] objectAtIndex:0]; [view release]; </code></pre> <p>It will mostly result in a crash when <code>viewController</code> is released since you are releasing it twice and <code>viewController's</code> subviews are also getting released internally.</p> <p>Here once thing you have to note is that, <code>addSubview</code> retains <code>view1</code> as mentioned in <a href="http://developer.apple.com/library/ios/#documentation/uikit/reference/uiview_class/uiview/uiview.html" rel="nofollow">Apple documentation.</a></p> <blockquote> <p>The view to be added. This view is retained by the receiver. After being added, this view appears on top of any other subviews.</p> </blockquote> <p>This will be released once <code>viewController</code> is released and you dont have to manually release it since you dont own it.</p>

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