Question

I have been trying to customize a navigation bar in an iPhone app. I was trying to use a subclass of navigationbar and use the layout subviews method to actually manipulate the views that I required. Right now, I am getting the list of the subviews but I have no idea how to detect which subview is a barbutton or which is the title view. All I can see in their description is that it is a UINavigationItem and and some additional information.
Need some help on this!

Thanks!

Answer 1

for (id view in self.subviews) {
    if ([view isKindOfClass:[UIBarButtonItem class]]) {
        // subview is UIBarButtonItem
    }
    // etc...
}

If the goal is to manipulate the size of the title, I think you should instead set the titleView of UINavigationItem. This must be done in the UIViewController that you push onto your UINavigationController.

- (void)viewDidLoad {
    [super viewDidLoad];
    // Play around with the frame of the UILabel to 
    // achieve the effect you are going for
    UILabel *label = [[UILabel alloc] initWithFrame:self.navigationItem.titleView.frame];
    label.text = @"Title text";
    label.font = [UIFont fontWithName:@"Oblik-Bold" size:18];
    label.backgroundColor = [UIColor clearColor];
    [label sizeToFit];
    self.navigationItem.titleView = label;
}

If you don’t want to do this in every UIViewController you could make a base class that implements the feature and all your UIViewControllers inherit from.