CODEWITHSUNDEEP
iphoneobjective-c
arielcamus
arielcamus

Reputation: 773

iPhone: [super viewDidUnload] calling order

I would like to know if there is any difference between calling [super viewDidUnload] before realeasing properties or after it.

Thank you!

  self.webView = nil;
  self.fullText = nil;
  [super viewDidUnload];

or

  [super viewDidUnload];
  self.webView = nil;
  self.fullText = nil;

Upvotes: 23

Views: 4923

Answers (5)

nonamelive
nonamelive

Reputation: 6510

This is just like the dealloc method.

- (void)dealloc
{
    [array release];
    [super dealloc];
}

So I think we should call [super viewDidUnload] last.

Upvotes: 2

ZaBlanc
ZaBlanc

Reputation: 4718

I never thought it mattered, but we just found a bug where the app crashed calling it first. The trend at my office has been to call it last, but the Apple template puts it first.

You can do what you want, but I will always call it last from now on.

Upvotes: 10

SteveCaine
SteveCaine

Reputation: 512

This question is not fully answered. (And it's first hit when I google on this topic, so a complete answer would be useful to me and others.)

If the superclass DOES something in viewDidUnload, then what is the correct order for calling it in your class's viewDidUnload: before or after releasing properties?

For the record, it seems the consensus is to call the super method LAST:

-(void)viewDidUnload {
    self.some_property = nil;
    [super viewDidUnload];
}

Upvotes: 6

conorgriffin
conorgriffin

Reputation: 4339

This only matters if the superclass of your view actually does something in viewDidLoad. The default UIViewController doesn't do anything in viewDidLoad so if your view is a standard UIViewController then you can put [super viewDidLoad] anywhere in the viewDidLoad method. However, if super does something in viewDidLoad, then it does matter where you put [super viewDidLoad].

Upvotes: 2

rpetrich
rpetrich

Reputation: 32316

This depends on what the superclass does in viewDidUnload. If it's just a standard UIViewController, either will do because -[UIViewController viewDidUnload] does nothing.

Upvotes: 12

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