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POLoading UIView from a nib file without guesswork
 

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    <p>Ok, here's another question.</p> <p>I am creating a UIView called <code>ProgressView</code> that is a semi-transparent view with an activity indicator and a progress bar. </p> <p>I want to be able to use this view throughout different view controllers in my app, when required.</p> <p>I know of 3 different ways of doing this (but I am only interested in one):</p> <p>1) Create the entire view programatically, instantiate and configure as required. No worries I get that one.</p> <p>2) Create the UIView in interface builder, add the required objects and load it using a method like the below. Problem with this is that we are basically guessing that the view is the objectAtIndex:0 because nowhere in the documentation I found a reference to the order of the elements returned from the <code>[[NSBundle mainBundle] loadNibName:</code> function.</p> <pre><code>NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"yournib" owner:self options:nil]; UIView *myView = [nibContents objectAtIndex:0]; myView.frame = CGRectMake(0,0,300,400); //or whatever coordinates you need [scrollview addSubview:myView]; </code></pre> <p>3) Subclass UIViewController and let it manage the view as per normal. In this case I would never be actually pushing the view controller onto the stack, but only its main view:</p> <pre><code>ProgressViewController *vc = [[ProgressViewController alloc] initWithNibName:@"ProgressView" bundle:nil]; [vc.view setCenter:CGPointMake(self.view.center.x, self.view.center.y)]; [self.view addSubview:vc.view]; [vc release]; </code></pre> <p>As far as I can tell, #3 is the the correct way of doing this (apart from programatically) but I am not entirely sure if it is safe to release the ProgressView's view controller whilst another controller's view is retaining its main view (gut feel says it is going to leak?)?</p> <p>What do I do in terms of memory management in this case, where and when should I release the ProgressView's view controller?</p> <p>Thanks in advance for your thoughts.</p> <p>Cheers,</p> <p>Rog</p>
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