Localization and CocoaPods

NSLocalizedString just invokes NSBundle's localizedStringForKey:value:table: so I wrote a NSBundle category to enable looking into several bundles (which in iOS are just folders):

NSString * const kLocalizedStringNotFound = @"kLocalizedStringNotFound";

+ (NSString *)localizedStringForKey:(NSString *)key
                              value:(NSString *)value
                              table:(NSString *)tableName
                       backupBundle:(NSBundle *)bundle
{
    // First try main bundle
    NSString * string = [[NSBundle mainBundle] localizedStringForKey:key
                                                               value:kLocalizedStringNotFound
                                                               table:tableName];

    // Then try the backup bundle
    if ([string isEqualToString:kLocalizedStringNotFound])
    {
        string = [bundle localizedStringForKey:key
                                         value:kLocalizedStringNotFound
                                         table:tableName];
    }

    // Still not found?
    if ([string isEqualToString:kLocalizedStringNotFound])
    {
        NSLog(@"No localized string for '%@' in '%@'", key, tableName);
        string = value.length > 0 ? value : key;
    }

    return string;
}

Then redefined NSLocalizedString macro in my prefix file:

#undef  NSLocalizedString
#define NSLocalizedString(key, comment) \
[NSBundle localizedStringForKey:key value:nil table:@"MyStringsFile" backupBundle:AlternativeBundleInsideMain]

The same for other macros if needed (i.e. NSLocalizedStringWithDefaultValue)