How can I change locale programmatically with Swift

Question

I am making ios app on XCODE 6.3 by Swift. And my app will have the choose language function like the image below

I already have storyboard for my local language. But i can't find out how to change the localization programmatically off the app by the button.

Anyone know how to do it

Answer 1

Here's a way to change it on the fly with Swift, add an extension function to String:

extension String {
func localized(lang:String) ->String {

    let path = NSBundle.mainBundle().pathForResource(lang, ofType: "lproj")
    let bundle = NSBundle(path: path!)

    return NSLocalizedString(self, tableName: nil, bundle: bundle!, value: "", comment: "")
}}

Swift 4:

extension String {
func localized(_ lang:String) ->String {

    let path = Bundle.main.path(forResource: lang, ofType: "lproj")
    let bundle = Bundle(path: path!)

    return NSLocalizedString(self, tableName: nil, bundle: bundle!, value: "", comment: "")
}}

then assuming you have the regular Localizable.strings set up with lang_id.lproj ( e.g. en.lproj, de.lproj etc. ) you can use this anywhere you need:

var val = "MY_LOCALIZED_STRING".localized("de")