Adding general and specific localizable files for targets in Xcode - ios

Question

I have two targets in my project: target1 and target2. Each of them uses their localizable.strings resource for localization. But their localizable.strings files are same for 90%.
I want to realize such behavior:
Create general localizable file with common strings
Create localizable files for each target with their special strings that are different (e.x. app_name)
Application should search the string in target's localizable.strings file at first and if this string is not exists, search it in common file
I tried to add localizable.string files for each target and then created common localizable.string file(with membership for target1 and target2), but application uses only common file :(
Does anybody know how to fix it?
Thank you for help!

Answer 1

Maybe you can create a pre-build script to concat the specific strings inside global strings.
Or an other solution, you can create a function to search first in global and after in a specific file (this is an example, not tested) :
- (NSString*) localizedString:(NSString*) key {
//search in global file
NSString *transcription = NSLocalizedString(key, "");
if ([transcription isEqualToString:key]) {
//search in specific file
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"specific_file" ofType:#"strings"];
NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:filePath];
return [dict objectForKey:key];
}
return transcription;
}

Answer 2

With thanks to lafalex, here is code for swift 2:
if let path = NSBundle.mainBundle().pathForResource("specific_file", ofType: "strings"),
let dict : NSDictionary = NSDictionary(contentsOfFile: path) {
if let localizedString = dict.objectForKey(key) as? String {
return localizedString
}
}