Localization on the fly with localized Storyboards

问题

I'm working on an app that has a toggle button to switch between English and Arabic language and should be on the fly. I'm using the method in https://github.com/maximbilan/ios_language_manager and it works fine in all cases except if the storyboard is localized by interface not strings:

Now when I reload the root view controller like this:

   func reloadRootVC(){

    let delegate : AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate

    let storyboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())

    delegate.window?.rootViewController = (storyboard.instantiateInitialViewController())
}

it reload the root with localized strings and in RTL but with the english storyboard not the arabic one.

Tried force loading the arabic one like this:

let storyboard = UIStoryboard(name: "Main", bundle: NSBundle(path: NSBundle.mainBundle().pathForResource(LanguageManager.currentLanguageCode(), ofType: "lproj")!))

but unfortunately it loads the storyboard but with no images. It can't read any resource image.

回答1:

I ended up by moving the arabic storyboard outside and name it Main-AR, then adding an extension in UIStoryboard to swizzle and initializer of storyboard to add -AR to the end of the storyboard name if i'm on arabic mode.

extension UIStoryboard {
public override class func initialize() {
    struct Static {
        static var token: dispatch_once_t = 0
    }

    // make sure this isn't a subclass
    if self !== UIStoryboard.self {
        return
    }

    dispatch_once(&Static.token) {
        let originalSelector = #selector(UIStoryboard.init(name:bundle:))
        let swizzledSelector = #selector(UIStoryboard.initWithLoc(_:bundle:))

        let originalMethod = class_getClassMethod(self, originalSelector)
        let swizzledMethod = class_getClassMethod(self, swizzledSelector)

        class_addMethod(self, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod))

        method_exchangeImplementations(originalMethod, swizzledMethod)

    }
}

// MARK: - Method Swizzling

class func initWithLoc(name: String, bundle storyboardBundleOrNil: NSBundle?) -> UIStoryboard{
    var newName = name
    if LanguageManager.isCurrentLanguageRTL(){
        newName += "-AR"
        if #available(iOS 9.0, *) {
            UIView.appearance().semanticContentAttribute = .ForceRightToLeft
        } else {
            // Fallback on earlier versions

        }
    }
    else{
        if #available(iOS 9.0, *) {
            UIView.appearance().semanticContentAttribute = .ForceLeftToRight
        } else {
            // Fallback on earlier versions
        }
    }
    return initWithLoc(newName, bundle: storyboardBundleOrNil)
}
}

回答2:

change the bundle which is used to init the storyboard:

        let path = Bundle.main.path(forResource: "ar", ofType: "lproj")
        let bundle = Bundle(path: path!)
        let delegate : AppDelegate = UIApplication.shared.delegate as! AppDelegate
        let storyboard = UIStoryboard(name: "Main", bundle: bundle)
        delegate.window?.rootViewController = (storyboard.instantiateInitialViewController())

although this change the storyboard based on language but do not load images! :(

来源：https://stackoverflow.com/questions/37005398/localization-on-the-fly-with-localized-storyboards

标签

ios

swift

localization

storyboard