你好，我正在尝试更改本地化字符串文件而不重新启动应用程序，更改语言后我需要重新启动应用程序才能看到新语言这就是我更改应用程序语言的方式，但我需要重新启动应用程序才能看到更改使用这个图书馆 https://github.com/marmelroy/Localize-Swift我需要以编程方式设置所有标签值，这很让人头疼我不想这样

var selectedLanguage:Languages
let preferredLanguage : String = Bundle.main.preferredLocalizations.first!
print("app langugage \(preferredLanguage)")
if(preferredLanguage == "en") {
    // Localize.setCurrentLanguage("de")
    selectedLanguage = .de
    LanguageManger.shared.setLanguage(language: selectedLanguage)
}
else {
    // Localize.setCurrentLanguage("en")
    selectedLanguage = .en
    LanguageManger.shared.setLanguage(language: selectedLanguage)

}

LanguageManger.shared.setLanguage(language: selectedLanguage)

// return to root view contoller and reload it

let transition: UIViewAnimationOptions = .transitionFlipFromLeft
let rootviewcontroller: UIWindow = ((UIApplication.shared.delegate?.window)!)!
        rootviewcontroller.rootViewController = self.storyboard?.instantiateViewController(withIdentifier: "rootnav")
        let mainwindow = (UIApplication.shared.delegate?.window!)!
        mainwindow.backgroundColor = UIColor(hue: 0.6477, saturation: 0.6314, brightness: 0.6077, alpha: 0.8)
        UIView.transition(with: mainwindow, duration: 0.55001, options: transition, animations: { () -> Void in
        }) { (finished) -> Void in

}

最佳答案

新建一个类NSBundle+Language.h，NSBundle+Language.m。并且不要忘记添加桥接头。

NSBundle+语言.h

#import <Foundation/Foundation.h>

@interface NSBundle (Language)
+(void)setLanguage:(NSString*)language;
@end

NSBundle+语言.m

#import "NSBundle+Language.h"

#import <objc/runtime.h>

static const char _bundle=0;

@interface BundleEx: NSBundle
@end

@implementation BundleEx
-(NSString*)localizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName
{
    NSBundle* bundle=objc_getAssociatedObject(self, &_bundle);
    return bundle ? [bundle localizedStringForKey:key value:value table:tableName]: [super localizedStringForKey:key value:value table:tableName];
}
@end

@implementation NSBundle (Language)

+(void)setLanguage:(NSString*)language
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^
                  {
                      object_setClass([NSBundle mainBundle],[BundleEx class]);
                  });
    objc_setAssociatedObject([NSBundle mainBundle], &_bundle, language ? [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]]: nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
@end

在此之后使用此语言管理器更改语言:-

class LanguageManager: NSObject {
    //MARK: Set language preference

    class func setSelectedLanguage(dictionary: [String: String]) {
        let userDefaults = UserDefaults.standard
        userDefaults.set(dictionary, forKey: kSelectedLanguageDetails)
        userDefaults.synchronize()
    }

    class  func getSelectedLanguage() ->  [String: String]? {

        let userDefaults = UserDefaults.standard
        return userDefaults.value(forKey: kSelectedLanguageDetails) as?  [String: String]
    }

    class func getSelectedLangaugeCode() -> String{
        if let selectedLanguageDetails = LanguageManager.getSelectedLanguage() {
            if let languageCode =  selectedLanguageDetails[LocalizationKeys.kLanguageCode.rawValue]  {
                Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
                return languageCode.lowercased()
            }
            else {
                let languageDetails = [LocalizationKeys.kLanguageCode.rawValue:"EN", LocalizationKeys.kLanguageName.rawValue:"English", LocalizationKeys.kLanguageID.rawValue:"1"]
                LanguageManager.setSelectedLanguage(dictionary: languageDetails)
                if let languageCode =  languageDetails[LocalizationKeys.kLanguageCode.rawValue] {
                    Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
                    return languageCode.lowercased()
                }
            }
        }
        else {
            let languageDetails = [LocalizationKeys.kLanguageCode.rawValue:"EN", LocalizationKeys.kLanguageName.rawValue:"English", LocalizationKeys.kLanguageID.rawValue:"1"]
            LanguageManager.setSelectedLanguage(dictionary: languageDetails )
            if let languageCode =  languageDetails[LocalizationKeys.kLanguageCode.rawValue] {
                Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
                return languageCode.lowercased()
            }
        }
        return "en"
    }

    /// Checks for the Language preferences selected by user
    class func checkLanguagePreferenceAndSetToDefaults() {
        if let selectedLanguageDetails = LanguageManager.getSelectedLanguage() {
            if let languageCode =  selectedLanguageDetails[LocalizationKeys.kLanguageCode.rawValue]  {
                Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
            }
            else {
                let languageDetails = [LocalizationKeys.kLanguageCode.rawValue:"EN", LocalizationKeys.kLanguageName.rawValue:"English", LocalizationKeys.kLanguageID.rawValue:"1"]
                LanguageManager.setSelectedLanguage(dictionary: languageDetails)
                if let languageCode =  languageDetails[LocalizationKeys.kLanguageCode.rawValue] {
                    Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
                }
            }
        }
        else {
            let languageDetails = [LocalizationKeys.kLanguageCode.rawValue:"EN", LocalizationKeys.kLanguageName.rawValue:"English", LocalizationKeys.kLanguageID.rawValue:"1"]
            LanguageManager.setSelectedLanguage(dictionary: languageDetails )
            if let languageCode =  languageDetails[LocalizationKeys.kLanguageCode.rawValue] {
                Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
            }
        }
    }


    //MARK: Get Language Code

    /// Return apple specific language code
    ///
    /// - parameter languageCode: language code string
    ///
    /// - returns: apples language code
    static func getAppleLanguageCode(languageCode:String) -> String{
        switch languageCode.lowercased() {
        case "en":
            return "en"
        case "es":
            return "es"
        case "fr":
            return "fr"
        case "de":
            return "de"
        case "it":
            return "it"

        default:
            return languageCode
        }
    }
}

如下定义语言选项:-

let KlanguageOptionArray: [[String:String]] = [
    [
        "LanguageCode": "EN",
        "Name": "English",
        "LanguageID": "1"
        ],
    [
        "LanguageCode": "ES",
        "Name": "Español",
        "LanguageID": "2"
        ],
    [
        "LanguageCode": "FR",
        "Name": "Français",
        "LanguageID": "3"
        ],
    [
        "LanguageCode": "DE",
        "Name": "Deutsch",
        "LanguageID": "4"
        ],
    [
        "LanguageCode": "IT",
        "Name": "Italiano",
        "LanguageID": "5"
        ]
]

使用下面的代码更改选择的语言

let selectedLanguageDetails = self.languageOptionArray[indexPath.row]
LanguageManager.setSelectedLanguage(dictionary: selectedLanguageDetails)
if let languageCode = selectedLanguageDetails[LocalizationKeys.kLanguageCode.rawValue] {
            Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
      NotificationCenter.default.post(name: NSNotification.Name(rawValue: NotificationCenterTypes.ReloadTableOnLanguageChangeNotification), object: nil)
   }

不要忘记在每次启动时添加它

if let selectedLanguageDetails = LanguageManager.getSelectedLanguage() {
    if let languageCode =  selectedLanguageDetails[LocalizationKeys.kLanguageCode.rawValue]  {
        Bundle.setLanguage(LanguageManager.getAppleLanguageCode(languageCode: languageCode.lowercased()))
    }
    else {
    }
}

希望对你有帮助

关于ios - 如何在不重新启动应用程序 swift4 的情况下更改本地化语言？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51153785/