CODEWITHSUNDEEP
uiviewcontrollerinitviewdidloadviewdidunload
ma11hew28
ma11hew28

Reputation: 126309

Which UIViewController properties should I set in -initWithNibName:bundle: vs. -viewDidLoad?

I understand that I should set self.title in -initWithNibName:bundle:.

  1. What about self.navigationItem.titleView?

    Since self.navigationItem.titleView seems only to be used when self.view is loaded, I'm thinking I should, to save memory, set self.navigationItem.titleView in -viewDidLoad and nil it in -viewDidUnload, e.g.:

    - (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.titleView = [[UIImageView alloc] initWithImage:
                                     [UIImage imageNamed:@"logo.png"]];
}

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

  2. What about self.navigationItem.backBarButtonItem?

Upvotes: 0

Views: 407

Answers (1)

ma11hew28
ma11hew28

Reputation: 126309

  1. It seems to work OK to set self.navigationItem.titleView in -viewDidLoad and nil it in -viewDidUnload.

  2. You should set self.navigationItem.backBarButtonItem in -initWithNibName:bundle because if you push two view controllers without animation -viewDidLoad will not get called for the first view controller that's pushed. So, if that view controller sets self.navigationItem.backBarButtonItem in -viewDidLoad, it will actually not get set, and the back button on the second view controller will just default to the title of the first view controller as usual.

Upvotes: 1

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