Custom Trimming Back button text of UINavigationController

Question

Environments:

I'm developing in-app locale changing support for my iOS Apps. It's pretty hard than it sounds, because locales of controls provided with UIKit are tied to iOS Locale.

I could fix almost problems but one thing is remaining for now:

The Problem:

When we push a view controller using an UINavigationController. It will automatically generates back button item with the navigation item title of the previous view controller.

However, what if the title is too long to display as a back button, UINavigationController uses Back as a fallback title. Automatically shorten title(Back) is tied to system locale. And it is my problem.

Can I change this behavior legally?

jeeeyul jeeeyul · Accepted Answer · 2014-11-10T06:54:21

I made custom UINavigationController and overrided pushViewController:animated:

-(void)pushViewController:(UIViewController *)viewController
                 animated:(BOOL)animated
{
    UINavigationItem* current = self.topViewController.navigationItem;

    if(current.backBarButtonItem == nil){
        current.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:current.title style:UIBarButtonItemStylePlain target:nil action:nil];
    }

    UIBarButtonItem* backItem = current.backBarButtonItem;
    CGFloat width = [backItem.title sizeWithAttributes:@{}].width;

    // Trimming to localized back text
    if(width > 70){
        backItem.title = [[KKCoreLocale shared] localizedStringForKey:@"Back"];
    }

    [super pushViewController:viewController animated:animated];
}

I can't sure this is best solution, However it is legal and works charm.

Custom Trimming Back button text of UINavigationController

1 Answers