如何将本地化的plist读取为Dictionary？

Question

How can I read a localised plist as dictionary? This felt promising …

if let path = NSBundle.mainBundle().pathForResource("LocalizedDictionary", ofType: "plist", inDirectory: ???, forLocalization: "en") {
        localizedDictionary = NSDictionary(contentsOfFile: path)
        return localizedDictionary
}

But I apparently I had issues getting right path for the inDirectory parameter. Is this the right approach?

How do I get the localised version of a plist file as Dictionary?

Note: I am not using NSLocalizedString as I had issues without switching languages while the app is running.

Answer 1

Here's something that should help.

Create a NSDictionary class extension like this. It can be tweaked and adapted to your needs ( to load 'strings' dictionaries for exemple, or passing the locale in a parameter… )

@implementation NSDictionary (NSDictionary_Extras)

+(NSDictionary*)dictionaryWithName:(NSString*)name
{
    NSDictionary    *dict = NULL;
    NSURL           *dictURL = [[NSBundle mainBundle] URLForResource:name withExtension:@"plist"];

    if (dictURL) {
        dict = [NSDictionary dictionaryWithContentsOfURL:dictURL];
    }

    return dict;
}

+(NSDictionary*)localizedDictionaryWithName:(NSString*)name
{
    NSDictionary    *localizedDict = NULL;
    NSString        *localizationName = [[NSLocale preferredLanguages] objectAtIndex:0];
    NSURL           *localizedDictURL = [[NSBundle mainBundle] URLForResource:name withExtension:@"plist" subdirectory:[NSString stringWithFormat:@"%@.lproj",localizationName]];
    // If resource doe not exist, we try at root ( resource must have a 'base' localization, or not being localized )
    if (!localizedDictURL) {
        localizedDictURL = [[NSBundle mainBundle] URLForResource:name withExtension:@"plist"];
    }

    if (localizedDictURL) {
        localizedDict = [NSDictionary dictionaryWithContentsOfURL:localizedDictURL];
    } 

    return localizedDict;
}

@end

Then you simply load a plist using :

NSDictionary* myDict = [NSDictionary dictionaryWithName:@"myDict"]

Or a localized plist with

NSDictionary* myDict = [NSDictionary localizedDictionaryWithName:@"myDict"].

I import this extra in all my projects.

Answer 2

You don't need to change any code.

xCode's resource localisation is neat and can frequently be completely transparent to you. You just ask the main bundle for resource urls as normal and load from them. NSBundle performs any mapping required to give you localised resources.

There's a tutorial here that got me going. It's a little out of date, but none of the significant details have changed.