Working with localization in swift part 2

Last year i write a post about localization covering some issues like switching language and right-to-left / left-to-right dilemma.

In this post am going to introduce a small library to do the heavy lifting for you.

The goals

  1. Switching the language without a restart.
  2. Switching layout direction and semantics based on the language RTL/LTR.
  3. Avoid duplication (nibs,stories)
  4. Simplicity (for real!!)

LocalizationHelper (MOLH)

You can download the repository from here , which has a demo app within it.

to install MOLH through Pods add

pod 'MOLH'

to your podfile. (check for more info about cocoapods)

How to use

in the Appdelegate `didFinishLaunchingWithOptions` method add


‘True’ to use swizzling, leaving most of the work on MOLH, otherwise you have to do some extra work. We will go through that.

Enable localization

  • Add Localizable.strings file
  • Project -> YOUR_PROJECT_NAME -> localization -> hit the plus language and add YOUR_LANGUAGE in our demo we add Arabic as its an RTL language.
  • Lastly add some text in the strings files in this format

` “TextToLocalize” = “itsLocalization”;

You may add localization for storyboard and/or xibs , but I don’t advise that , it will become hard later to modify them. so it’s better to stick with the strings file.

Take effect

If you are not using swizzling then use the appropriate subclass from MOLH e.g. MOLHLabel.

The most important factor for a view here is the tag .

If it's less than zero MOLH will consider that it wishes to adapt the natural direction and it will be affected. By default all views have zero tag and hence not affected, so it’s an opt-in feature.

For the autolayout flipping you don’t need to do anything. Though, to opt-out, then from attribute inspector click on one of the items and uncheck “Respect language direction” .

Custom Views




if MOLHLanguage.isRTL() {titleLabel?.font = UIFont.appSettingNotSelectedFontArabi()}

Change the language

in that function call you need to call setLanguage “accept with locale like en-us” and reset. e.g.

MOLH.setLanguageTo(MOLHLanguage.currentAppleLanguage() == “en” ? “ar” : “en”)MOLH.reset()

back to Appdelegate.swift , add conformance to MOLHResetable, and implement the reset function. It’s better IMO to handle reloading viewcontrollers in somewhere close to the Appdelegate.

Other Frameworks and bundles

Some controls such as ActionSheetDatePicker have locale property so you can set them appropriately e.g.

actionSheetDatePicker?.locale = Locale(identifier: MOLHLanguage.currentLocaleIdentifier())

others don’t, and in that case you need to handle their localization yourself and simply tell MOLH that those words will be handled by the app bundle. you can do that using specialKeyWords

MOLH.shared.specialKeyWords = [“Cancel”,”Done”]

where cancel and done are strings used by another bundle and you are providing localizations for them in your Localizable.string.


MOLHFont.shared.arabic = R.font.winSoftProMedium(size: 18)!

and there is a method you can use on UIButton,UITextField,UILabel,UITextView called updatefont(), that you can call to change the font into arabic if needed , currently MOLH support specifing arabic font, since I haven’t used another languages tbh :/.

or you may inherit from MOLHFont<UIType>.




Swift/objc/react-native developer

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