Layout semantics

Localize_Swift.xcodeproj/project.pbxproj

@@ -474,7 +474,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -524,7 +524,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -551,7 +551,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -572,7 +572,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "com.roymarmelstein.Localize-Swift";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
@@ -583,7 +583,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.roymarmelstein.Localize-SwiftTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -594,7 +594,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.roymarmelstein.Localize-SwiftTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};

README.md

@@ -36,7 +36,12 @@ Localize.availableLanguages()
 
 To change the current language:
 ```swift
-Localize.setCurrentLanguage("fr")
+Localize.currentLanguage = "fr"
+```
+
+To change app semantics depending on language, add this to appdelegate on didFinishLaunchingWithOptions:
+```swift
+Localize.changeSemantics = true
 ```
 
 To update the UI in the view controller where a language change can take place, observe LCLLanguageChangeNotification:

Sources/Localize.swift

@@ -7,6 +7,7 @@
 //
 
 import Foundation
+import UIKit
 
 /// Internal current language key
 let LCLCurrentLanguageKey = "LCLCurrentLanguageKey"
@@ -23,10 +24,10 @@ public let LCLLanguageChangeNotification = "LCLLanguageChangeNotification"
 // MARK: Localization Syntax
 
 /**
-Swift 1.x friendly localization syntax, replaces NSLocalizedString
-- Parameter string: Key to be localized.
-- Returns: The localized string.
-*/
+ Swift 1.x friendly localization syntax, replaces NSLocalizedString
+ - Parameter string: Key to be localized.
+ - Returns: The localized string.
+ */
 public func Localized(_ string: String) -> String {
     return string.localized()
 }
@@ -61,7 +62,7 @@ public extension String {
     func localized() -> String {
         return localized(using: nil, in: .main)
     }
-
+    
     /**
      Swift 2 friendly localization syntax with format arguments, replaces String(format:NSLocalizedString)
      - Returns: The formatted localized string with arguments.
@@ -87,6 +88,16 @@ public extension String {
 // MARK: Language Setting Functions
 
 open class Localize: NSObject {
+    // Set appearnce language direction responsnding
+    public static var changeSemantics = false {
+        didSet{
+            if #available(iOS 9.0, *) {
+                setCurrentSemantics(currentLanguage)
+            } else {
+                // Fallback on earlier versions
+            }
+        }
+    }
 
     /**
      List available languages
@@ -101,35 +112,53 @@ open class Localize: NSObject {
         return availableLanguages
     }
 
-    /**
-     Current language
-     - Returns: The current language. String.
-     */
-    open class func currentLanguage() -> String {
-        if let currentLanguage = UserDefaults.standard.object(forKey: LCLCurrentLanguageKey) as? String {
-            return currentLanguage
+
+
+
+    /// get and set current language of the app via string, ex: "ar", "en", ... etc
+    open class var currentLanguage: String {
+        get {
+            if let currentLanguage = UserDefaults.standard.object(forKey: LCLCurrentLanguageKey) as? String {
+                return currentLanguage
+            }
+            return defaultLanguage
+        }set{
+            let selectedLanguage = availableLanguages().contains(newValue) ? newValue : defaultLanguage
+            if (selectedLanguage != currentLanguage){
+                UserDefaults.standard.set(selectedLanguage, forKey: LCLCurrentLanguageKey)
+                UserDefaults.standard.synchronize()
+                NotificationCenter.default.post(name: Notification.Name(rawValue: LCLLanguageChangeNotification), object: nil)
+                if #available(iOS 9.0, *) {
+                    setCurrentSemantics(selectedLanguage)
+                } else {
+                    // Fallback on earlier versions
+                }
+            }
         }
-        return defaultLanguage()
     }
 
-    /**
-     Change the current language
-     - Parameter language: Desired language.
-     */
-    open class func setCurrentLanguage(_ language: String) {
-        let selectedLanguage = availableLanguages().contains(language) ? language : defaultLanguage()
-        if (selectedLanguage != currentLanguage()){
-            UserDefaults.standard.set(selectedLanguage, forKey: LCLCurrentLanguageKey)
-            UserDefaults.standard.synchronize()
-            NotificationCenter.default.post(name: Notification.Name(rawValue: LCLLanguageChangeNotification), object: nil)
+
+
+    @available(iOS 9.0, *)
+    open class func setCurrentSemantics(_ language: String) {
+        if changeSemantics {
+            let direction = Locale.characterDirection(forLanguage: language)
+            switch direction {
+            case .rightToLeft:
+                UIView.appearance().semanticContentAttribute = .forceRightToLeft
+            case .leftToRight:
+                UIView.appearance().semanticContentAttribute = .forceLeftToRight
+            default:
+                break
+            }
         }
     }
 
     /**
      Default language
      - Returns: The app's default language. String.
      */
-    open class func defaultLanguage() -> String {
+    open class var defaultLanguage: String {
         var defaultLanguage: String = String()
         guard let preferredLanguage = Bundle.main.preferredLocalizations.first else {
             return LCLDefaultLanguage
@@ -148,7 +177,7 @@ open class Localize: NSObject {
      Resets the current language to the default
      */
     open class func resetCurrentLanguageToDefault() {
-        setCurrentLanguage(self.defaultLanguage())
+        currentLanguage = self.defaultLanguage
     }
 
     /**
@@ -157,7 +186,7 @@ open class Localize: NSObject {
      - Returns: The localized string.
      */
     open class func displayNameForLanguage(_ language: String) -> String {
-        let locale : NSLocale = NSLocale(localeIdentifier: currentLanguage())
+        let locale : NSLocale = NSLocale(localeIdentifier: currentLanguage)
         if let displayName = locale.displayName(forKey: NSLocale.Key.identifier, value: language) {
             return displayName
         }

Sources/String+LocalizedBundleTableName.swift

@@ -24,7 +24,7 @@ public extension String {
      */
     func localized(using tableName: String?, in bundle: Bundle?) -> String {
         let bundle: Bundle = bundle ?? .main
-        if let path = bundle.path(forResource: Localize.currentLanguage(), ofType: "lproj"),
+        if let path = bundle.path(forResource: Localize.currentLanguage, ofType: "lproj"),
             let bundle = Bundle(path: path) {
             return bundle.localizedString(forKey: self, value: nil, table: tableName)
         }

examples/LanguageSwitch/Sample/ViewController.swift

@@ -54,7 +54,7 @@ class ViewController: UIViewController {
             let displayName = Localize.displayNameForLanguage(language)
             let languageAction = UIAlertAction(title: displayName, style: .default, handler: {
                 (alert: UIAlertAction!) -> Void in
-                    Localize.setCurrentLanguage(language)
+                    Localize.currentLanguage = language
             })
             actionSheet.addAction(languageAction)
         }

examples/LanguageSwitch/SampleTests/SampleTests.swift

@@ -18,60 +18,60 @@ class SampleTests: XCTestCase {
 
     func testSwift1Syntax() {
         let testString = "Hello world";
-        Localize.setCurrentLanguage("fr")
+        Localize.currentLanguage = "fr"
         let translatedString = Localized(testString)
         XCTAssertEqual(translatedString, "Bonjour le monde")
     }
 
     func testSwift2Syntax() {
         let testString = "Hello world";
-        Localize.setCurrentLanguage("fr")
+        Localize.currentLanguage = "fr"
         let translatedString = testString.localized()
         XCTAssertEqual(translatedString, "Bonjour le monde")
     }
 
     func testMultipleLanguageSwitching() {
         let testString = "Hello world";
-        Localize.setCurrentLanguage("es")
+        Localize.currentLanguage = "es"
         XCTAssertEqual(testString.localized(), "Hola mundo")
-        Localize.setCurrentLanguage("de")
+        Localize.currentLanguage = "de"
         XCTAssertEqual(testString.localized(), "Hallo Welt")
         Localize.resetCurrentLanguageToDefault()
         XCTAssertEqual(testString.localized(), "Hello world")
     }
 
     func testFalseLanguage() {
         let testString = "Hello world";
-        Localize.setCurrentLanguage("xxx")
+        Localize.currentLanguage = "xxx"
         XCTAssertEqual(testString.localized(), "Hello world")
     }
 
     func testFalseString() {
         let testString = "Non translated string";
-        Localize.setCurrentLanguage("fr")
+        Localize.currentLanguage = "fr"
         XCTAssertEqual(testString.localized(), "Non translated string")
     }
 
 	func testTableName() {
 		let testString = "Change";
-		Localize.setCurrentLanguage("fr")
+		Localize.currentLanguage = "fr"
         let translatedString = testString.localized(using: "ButtonTitles")
 		XCTAssertEqual(translatedString, "Modifier")
 	}
 
     func testTableNameMultipleLanguage() {
         let testString = "Change";
-        Localize.setCurrentLanguage("es")
+        Localize.currentLanguage = "es"
         XCTAssertEqual(testString.localized(using: "ButtonTitles"), "Cambiar")
-        Localize.setCurrentLanguage("de")
+        Localize.currentLanguage = "de"
         XCTAssertEqual(testString.localized(using: "ButtonTitles"), "Ändern")
         Localize.resetCurrentLanguageToDefault()
         XCTAssertEqual(testString.localized(using: "ButtonTitles"), "Change")
     }
 
     func testTableNameFail() {
         let testString = "Change";
-        Localize.setCurrentLanguage("xxx")
+        Localize.currentLanguage = "xxx"
         let translatedString = testString.localized(using: "ButtonTitles")
         XCTAssertEqual(translatedString, "Change")
     }