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POrelease view in viewDidUnload
 

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    <p>I know that if I retain an IBOutlet by using property then I have to set it to nil in <code>viewDidUnload</code> but what about others?</p> <p>For example, i have three subviews view1, view2 and view3, that load from nib and that is the controller's header file</p> <pre><code>@interface MyViewController : UIViewController { IBOutlet UIView *view1; UIView *view2; //no reference for view3 } @property (nonatomic, retain) IBOutlet UIView *view2; //property view2 is an IBOutlet!! @end </code></pre> <p>and method <code>viewDidUnload</code></p> <pre><code>- (void)viewDidUnload { self.view2 = nil; //[view1 release]; //view1 = nil; [super viewDidUnload]; } </code></pre> <p>do I have to release view1 and set it to nil? or UIViewController will set it to nil for me? what about view3?</p> <p>also do I have to release view1 in <code>dealloc</code>?</p> <p>edit: I think many people does not understand my question</p> <p>Firstly, view1 is an IBOutlet which declared as an ivar and assign an ivar will not retain it. I know that UIViewController definitely will retain it but do i have to release it or UIViewController will release it for me? If UIViewController will release it then there is no point that i have to release it again.</p> <p>Secondly, view2 is also an IBOutlet although it is declared as a property not ivar.</p> <pre><code>@property (nonatomic, retain) IBOutlet UIView *view2; </code></pre> <p>It is a retain property, therefore set it will retain it so I know that I have to set it to nil in order to release it. I have no problem about it.</p> <p>For view3, there is no reference for it, therefore I am assuming I don't have to do anything about it. I also assuming there is no need to make a reference for <code>every</code> object in nib.</p>
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    1. USBryan Chen
    1. USBryan Chen
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    1. COWhy is there no reference for `view3`?
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      1. USDeepak Danduprolu
    2. CONot an answer, but if you have a problem understanding reference counts, just log them: `NSLog(@"view1 retainCount: %d", [view1 retainCount])`. This will help you to see which of the views to release. Also play around with the "leaks" instrument (build -> profile). Keep in mind this doesn't always catch leaks, for instance when your viewController is never deallocated (because technically, this isn't a problem - but it's better style to be prepared).
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      1. USfzwo
    3. CO@Deepak do i have to make a reference for every subview in nib?
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      1. USBryan Chen
 

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