这是一个老问题，但我正在开发一个助手，可以在语言实时更改时通知我。
请查看助手的代码：
import Foundation
class LocalizableLanguage {
fileprivate static let APPLE_LANGUAGE_KEY = "AppleLanguages"
static let ApplicationDidChangeLanguage = Notification.Name("ApplicationDidChangeLanguage")
static var availableLanguages: [String]? = {
return UserDefaults.standard.object(forKey: APPLE_LANGUAGE_KEY) as? [String]
}()
static var currentLanguageCode: String? = {
return availableLanguages?.first
}()
static var currentShortLanguageCode: String? = {
guard let currentLanguageCode = currentLanguageCode else {
return nil
}
let strIndex = currentLanguageCode.index(currentLanguageCode.startIndex, offsetBy: 2)
return currentLanguageCode.substring(to: strIndex)
}()
class func setLanguage(withCode langCode: String) {
let matchedLangCode = availableLanguages?.filter {
$0.contains(langCode)
}.first
guard let fullLangCode = matchedLangCode else {
return
}
var reOrderedArray = availableLanguages?.filter {
$0.contains(langCode) == false
}
reOrderedArray?.insert(fullLangCode, at: 0)
guard let langArray = reOrderedArray else {
return
}
UserDefaults.standard.set(langArray, forKey: APPLE_LANGUAGE_KEY)
UserDefaults.standard.synchronize()
LocalizableLanguage.refreshAppBundle()
NotificationCenter.default.post(name: ApplicationDidChangeLanguage, object: fullLangCode)
}
}
private extension LocalizableLanguage {
class func refreshAppBundle() {
MethodSwizzleGivenClassName(cls: Bundle.self, originalSelector: #selector(Bundle.localizedString(forKey:value:table:)), overrideSelector: #selector(Bundle.specialLocalizedStringForKey(_:value:table:)))
}
class func MethodSwizzleGivenClassName(cls: AnyClass, originalSelector: Selector, overrideSelector: Selector) {
let origMethod: Method = class_getInstanceMethod(cls, originalSelector);
let overrideMethod: Method = class_getInstanceMethod(cls, overrideSelector);
if (class_addMethod(cls, originalSelector, method_getImplementation(overrideMethod), method_getTypeEncoding(overrideMethod))) {
class_replaceMethod(cls, overrideSelector, method_getImplementation(origMethod), method_getTypeEncoding(origMethod));
} else {
method_exchangeImplementations(origMethod, overrideMethod);
}
}
}
extension Bundle {
func specialLocalizedStringForKey(_ key: String, value: String?, table tableName: String?) -> String {
let availableLanguages = UserDefaults.standard.object(forKey: LocalizableLanguage.APPLE_LANGUAGE_KEY) as? [String]
let currentLanguageCode = availableLanguages?.first ?? "en-US"
let currentShortLanguageCode = currentLanguageCode.substring(to: currentLanguageCode.index(currentLanguageCode.startIndex, offsetBy: 2))
let path =
Bundle.main.path(forResource: currentLanguageCode, ofType: "lproj") ??
Bundle.main.path(forResource: currentShortLanguageCode, ofType: "lproj") ??
Bundle.main.path(forResource: "Base", ofType: "lproj")
guard
self == Bundle.main,
let bundlePath = path,
let bundle = Bundle(path: bundlePath)
else {
return self.specialLocalizedStringForKey(key, value: value, table: tableName)
}
return bundle.specialLocalizedStringForKey(key, value: value, table: tableName)
}
}
你只需要复制那段代码并将其放入你的项目中。
然后，你只需像这样简单地实现监听器：
NotificationCenter.default.addObserver(forName: LocalizableLanguage.ApplicationDidChangeLanguage, object: nil, queue: nil) { notification in
guard let langCode = notification.object as? String else {
return
}
self.accountStore.languageCode.value = langCode
}
请注意，这一行代码
self.accountStore.languageCode.value = langCode 是我需要在应用程序语言更改时刷新的内容，然后我可以轻松地更改所有ViewModels中的字符串，以便立即将语言更改为用户所需的语言。
为了更改语言，您只需调用：
LocalizableLanguage.setLanguage(withCode: "en")
其他可能对您有帮助的辅助工具是：
import Foundation
extension String {
var localized: String {
return NSLocalizedString(self, comment: "")
}
}
如果您在可本地化的文件中有以下内容：
main.view.title = "Title test"
您可以简单地调用：
"main.view.title".localized
并且您已经翻译了您的字符串。
exit(0)，从未在与苹果的审核中遇到问题。 - Rog