CODEWITHSUNDEEP
objective-ccocoa-touchuinavigationbar
Rudolf Adamkovič
Rudolf Adamkovič

Reputation: 31486

Custom drawRect: in UINavigationBar subclass

I want to subclass UINavigationBar so that I can do custom drawing in its drawRect:.

Here's my code:

Navigation Controller (.h)

@interface CORENavigationController : UINavigationController

@property (strong, nonatomic) CORENavigationBar *customNavigationBar;

@end

Navigation Controller (.m)

@implementation CORENavigationController

@synthesize customNavigationBar = _customNavigationBar;

- (UINavigationBar *)navigationBar {
    if (![self customNavigationBar]) {
        [self setCustomNavigationBar:[[CORENavigationBar alloc] init]];
    }
    return [self customNavigationBar];
}

Navigation Bar (.h)

@interface CORENavigationBar : UINavigationBar

@end

Navigation Bar (.m)

@implementation CORENavigationBar

- (void)drawRect:(CGRect)rect
{
    [super drawRect:rect];
}

The issue is that the navigation bar has no title, e.g. all I can see is just the standard blue background.

As soon as I remove the following method, the title is back there:

- (UINavigationBar *)navigationBar {
    if (![self customNavigationBar]) {
        [self setCustomNavigationBar:[[CORENavigationBar alloc] init]];
    }
    return [self customNavigationBar];
}

Why does the title disappear? I call the super's drawRect: and do not change anything else.

Thanks!

Upvotes: 3

Views: 1246

Answers (1)

Rudolf Adamkovič
Rudolf Adamkovič

Reputation: 31486

Found it! Here's the answer:

https://stackoverflow.com/a/9610801/1306956

In this case, it'd be:

[navigationController setValue:[[CORENavigationBar alloc] init] forKeyPath:@"navigationBar"];

Tested on iOS 5.1.1 (9B206). Works like a charm.

Upvotes: 3

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