Swift之本地国际化与App内切换语言

添加语言库

点击项目 -> PROJECT -> Info -> Localizations -> + , 添加需要的语言;

添加完成的语言库如下所示:

创建Localizable.strings

然后选择新创建的 Localizable.string, 选中所需要的语言;

Localizable.strings 文件写入

添加语言库成功之后, Localizable.strings就生成了English、Chinese Simplified、Chinese Traditional三个语言文件;
Localizable.strings 文件中写入, 以"key" = “value”; 这样的格式;
English:

INTERNATIONALIZATION = "Internationalization";
CHANGE = "switch";
HANDSOME = "Handsome Boy";

Chinese Simplified

INTERNATIONALIZATION = "国际化";
CHANGE = "切换";
HANDSOME = "帅哥";

Chinese Traditional

INTERNATIONALIZATION = "國際化";
CHANGE = "切換";
HANDSOME = "帥哥";

YDWLocalizationHelper

该工具类可以直接拖入工程中使用, 主要实现功能:

第一次进入App时, 自动根据系统的语言设定当前App的语言;
保存当前用户设定的语言;
自定义切换语言功能;
控件赋值的获取和设定;
切换语言后替换掉mainBundle为当前语言的bundle;

import UIKitclass YDWLocalizationHelper: NSObject {fileprivate static let kSharedSettingsKey = "DefaultUserSettings"var language: Languageenum Language: String {case Chinese = "zh-Hans"case English = "en"case Tradition = "zh-Hant"case Vietnamese = "vi"var code: String {return rawValue}}// MARK: 创建单例static let shared: YDWLocalizationHelper = {let appSettings: YDWLocalizationHelperif let savedData = UserDefaults.standard.object(forKey: YDWLocalizationHelper.kSharedSettingsKey) as? Data,let defaultSettings = NSKeyedUnarchiver.unarchiveObject(with: savedData) as? YDWLocalizationHelper {appSettings = defaultSettings} else {appSettings = YDWLocalizationHelper()}return appSettings}()// MARK: 获取键值func valueWithKey(key: String!) -> String {let str = NSLocalizedString(key, comment: "")return str}// MARK: - 保存用户当前语言static func saveSharedInstance() {let data = NSKeyedArchiver.archivedData(withRootObject: YDWLocalizationHelper.shared)UserDefaults.standard.set(data, forKey: YDWLocalizationHelper.kSharedSettingsKey)}static func localeIsChinese() -> Language {if let lang = Locale.preferredLanguages.first {if lang.hasPrefix("zh") {if lang.contains("Hant") || lang.contains("Trad") {return .Tradition}return .Chinese} else if lang.contains("en") {return .English} else if lang.hasPrefix("viet") {return .Vietnamese} else {return .English}} else {return .English}}// MARK: 首次进入语言override init() {language = YDWLocalizationHelper.localeIsChinese()super.init()}}private var bundleByLanguageCode: [String: Foundation.Bundle] = [:]extension YDWLocalizationHelper.Language {var bundle: Foundation.Bundle? {if let bundle = bundleByLanguageCode[code] {return bundle} else {let mainBundle = Foundation.Bundle.mainif let path = mainBundle.path(forResource: code, ofType: "lproj"),let bundle = Foundation.Bundle(path: path) {bundleByLanguageCode[code] = bundlereturn bundle} else {return nil}}}
}// 当调用YDWLocalizationHelper.Language切换语言后替换掉mainBundle为当前语言的bundle
class Bundle: Foundation.Bundle {override func localizedString(forKey key: String, value: String?, table tableName: String?) -> String {if let bundle = YDWLocalizationHelper.shared.language.bundle {return bundle.localizedString(forKey: key, value: value, table: tableName)} else {return super.localizedString(forKey: key, value: value, table: tableName)}}
}

语言切换

AppDelegate中: object_setClass(Foundation.Bundle.main, Bundle.self)

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {object_setClass(Foundation.Bundle.main, Bundle.self)return true}

使用:设定时只需要在控件上, 通过YDWLocalizationHelper.shared.valueWithKey(key: “INTERNATIONALIZATION”)来设定即可; 而切换语言只需要通过设定YDWLocalizationHelper.shared.language = .Chinese即可;(其中valueWithKey和YDWLocalizationHelper.shared.language实现如下)

 // comment 是传参, 假如value中需要外界来决定内容,可以用%@,然后comment传参func valueWithKey(key: String!) -> String {let str = NSLocalizedString(key, comment: "")return str}// 切换语言时,只要设置就可以:YDWLocalizationHelper.shared.language = .Chinese //  .Chinese

最后重载RootViewController即可:

 let appDelegate = UIApplication.shared.delegate as! AppDelegateappDelegate.setupRootViewController()

对于story 中的国际化, 需要重设一下RootViewController

    func resetRootViewController() {if let appdelegate = UIApplication.shared.delegate {let storyBoard = UIStoryboard.init(name: "Main", bundle: nil)if let mainController = storyBoard.instantiateViewController(withIdentifier: "rootViewController") as? UINavigationController {appdelegate.window??.rootViewController = mainController}}}

刷新界面

对于所有界面的刷新最方便的就是重新设置 rootViewController, 将keyWindow先变黑，假装loading个几秒，再变回来即可。如果需要再次回到之前所在页面，再添加相应的跳转VC的方法;

 func chooseLanguage(menu: [String : Any]) {let language = menu["language"] as! Stringvar noticeContent = "正在设置语言..."if language == "中文(简体)" {noticeContent = "正在设置语言..."YDWLocalizationHelper.shared.language = .Chinese} else if language == "中文(繁體)" {noticeContent = "正在設置語言..."YDWLocalizationHelper.shared.language = .Tradition} else if language == "English" {noticeContent = "Setting Language..."YDWLocalizationHelper.shared.language = .English} else if language == "Tiếng Việt" {noticeContent = "Thiết lập ngôn ngữ..."YDWLocalizationHelper.shared.language = .Vietnamese} else {noticeContent = "正在设置语言..."YDWLocalizationHelper.shared.language = .Chinese}if UIApplication.shared.delegate != nil {let appDelegate = UIApplication.shared.delegate as! AppDelegateappDelegate.setupRootViewController()}let backView = UIView(frame: UIScreen.main.bounds)backView.backgroundColor = .blackUIApplication.shared.keyWindow?.addSubview(backView)YDWToast.showToast(text: noticeContent, duration: 2, location: .center)DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 2) {UIView.animate(withDuration: 0.2, animations: {backView.alpha = 0}) { (isFinished) inbackView.removeFromSuperview()}}}

效果展示

完整示例

Swift之Internationalization本地国际化和App内切换语言

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Swift之本地国际化与App内切换语言

添加语言库

Localizable.strings 文件写入

YDWLocalizationHelper

语言切换

刷新界面

效果展示

完整示例

Swift之本地国际化与App内切换语言相关推荐

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