如何强制NSLocalizedString使用特定语言

#1 楼

[[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"de", @"en", @"fr", nil] forKey:@"AppleLanguages"];
[[NSUserDefaults standardUserDefaults] synchronize]; //to make the change immediate

#2 楼

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

#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

[NSBundle setLanguage:@"en"];

[NSBundle setLanguage:@"fr"];

[NSBundle setLanguage:nil];

var bundleKey: UInt8 = 0

class AnyLanguageBundle: Bundle {

    override func localizedString(forKey key: String,
                                  value: String?,
                                  table tableName: String?) -> String {

        guard let path = objc_getAssociatedObject(self, &bundleKey) as? String,
              let bundle = Bundle(path: path) else {

            return super.localizedString(forKey: key, value: value, table: tableName)
            }

        return bundle.localizedString(forKey: key, value: value, table: tableName)
    }
}

extension Bundle {

    class func setLanguage(_ language: String) {

        defer {

            object_setClass(Bundle.main, AnyLanguageBundle.self)
        }

        objc_setAssociatedObject(Bundle.main, &bundleKey,    Bundle.main.path(forResource: language, ofType: "lproj"), .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
    }
}

#3 楼

@implementation Language

static NSBundle *bundle = nil;

+(void)initialize 
{
    NSUserDefaults* defs = [NSUserDefaults standardUserDefaults];
    NSArray* languages = [defs objectForKey:@"AppleLanguages"];
    NSString *current = [[languages objectAtIndex:0] retain];
    [self setLanguage:current];
}

/*
  example calls:
    [Language setLanguage:@"it"];
    [Language setLanguage:@"de"];
*/
+(void)setLanguage:(NSString *)l
{
    NSLog(@"preferredLang: %@", l);
    NSString *path = [[ NSBundle mainBundle ] pathForResource:l ofType:@"lproj" ];
    bundle = [[NSBundle bundleWithPath:path] retain];
}

+(NSString *)get:(NSString *)key alter:(NSString *)alternate 
{
    return [bundle localizedStringForKey:key value:alternate table:nil];
}

@end

#4 楼

#define currentLanguageBundle [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:[[NSLocale preferredLanguages] objectAtIndex:0] ofType:@"lproj"]]

NSLocalizedStringFromTableInBundle(@"GalleryTitleKey", nil, currentLanguageBundle, @"")

#5 楼

[[NSUserDefaults standardUserDefaults] setObject: [NSArray arrayWithObjects:@"el", nil] forKey:@"AppleLanguages"];

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#7 楼

extension String {

    func localized(forLanguage language: String = Locale.preferredLanguages.first!.components(separatedBy: "-").first!) -> String {

        guard let path = Bundle.main.path(forResource: language == "en" ? "Base" : language, ofType: "lproj") else {

            let basePath = Bundle.main.path(forResource: "Base", ofType: "lproj")!

            return Bundle(path: basePath)!.localizedString(forKey: self, value: "", table: nil)
        }

        return Bundle(path: path)!.localizedString(forKey: self, value: "", table: nil)
    }
}

"report".localized(forLanguage: "pl") //forced language
"report".localized() //default language selected by user in settings, in case when your app doesnt support selected lanaguage, the default one is selected, here is an english.

#8 楼

#9 楼

但是，用户默认字典的所有值都可以被命令行参数覆盖。请参阅NSUserDefaults上的NSArgumentDomain文档。这甚至包括从应用程序首选项（.plist）文件加载的那些值。很高兴知道您是否只想更改一个值以进行测试。您忘记稍后再删除此代码...），而是告诉Xcode使用命令行参数启动您的应用程序（例如，使用西班牙语本地化）：



否需要完全触摸您的代码。只需为不同的语言创建不同的方案，就可以通过切换方案快速以一种语言启动应用程序，然后以另一种语言快速启动应用程序。

评论

---

此功能仅在第一次后才能再次加载到设备偏好设置中。语言 ..

–问
17年8月1日在17:05

---

@Aks每次都为我工作。确保您启动了正确的方案，确保您从Xcode内部开始（重新启动，派生等），并且确保您没有像Apple提供的新Xcode版本那样覆盖Options中的语言那也是。

–梅基
17年8月2日在8:34

---

感谢您的回复@Mecki ..对我来说，它不能在xcode中工作，但是当我在代码中提及时，它可以工作。我要传递参数的语言...

–问
17年8月2日在20:04

---

@Aks在设备上使用时，它仅在直接从Xcode启动时才起作用，当您通过在某些设备上点击其图标再次启动该应用程序时，它将不起作用，并且在该应用程序被杀死时也将不起作用（因为它进入后台）并由系统重新启动（因为此重新启动不是Xcode进行的重新启动）-因此，如果iOS必须在两者之间杀死您的应用程序，则切换到其他应用程序并返回可能不起作用需要内存）。

–梅基
17年8月3日在15:14

---

您可以将此参数传递与StandardUserDefaults中的更改结合使用，每次都将像超级按钮一样工作

– Leemur
7月7日23:17

---

#10 楼

#import "Language.h"    
#define MyLocalizedString(key, alt) [Language get:key alter:alt]

#11 楼

// NSBundle+RunTimeLanguage.h
#import <Foundation/Foundation.h>
@interface NSBundle (RunTimeLanguage)
#define NSLocalizedString(key, comment) [[NSBundle mainBundle] runTimeLocalizedStringForKey:(key) value:@"" table:nil]
- (NSString *)runTimeLocalizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName;
@end

#12 楼

NSUserDefaults.standardUserDefaults().setObject(["fr"], forKey: "AppleLanguages")
NSUserDefaults.standardUserDefaults().synchronize()

#13 楼

- (void)setLanguage:(NSString *)lang
{
    NSString *path = [[NSBundle mainBundle] pathForResource:lang ofType:@"lproj"];
    if (!path)
    {
        _bundle = [NSBundle mainBundle];
        NSLog(@"Warning: No lproj for %@, system default set instead !", lang);
        return;
    }

    _bundle = [NSBundle bundleWithPath:path];
}

- (NSString *)localizedStringForKey:(NSString *)key value:(NSString *)value
{
    // bundle was initialized with [NSBundle mainBundle] as default and modified in setLanguage method
    return [self.bundle localizedStringForKey:key value:value table:nil];
}

#14 楼

extension Locale {
    static var preferredLanguage: String {
        get {
            return self.preferredLanguages.first ?? "en"
        }
        set {
            UserDefaults.standard.set([newValue], forKey: "AppleLanguages")
            UserDefaults.standard.synchronize()
        }
    }
}

extension String {
    var localized: String {

    var result: String

    let languageCode = Locale.preferredLanguage //en-US

    var path = Bundle.main.path(forResource: languageCode, ofType: "lproj")

    if path == nil, let hyphenRange = languageCode.range(of: "-") {
        let languageCodeShort = languageCode.substring(to: hyphenRange.lowerBound) // en
        path = Bundle.main.path(forResource: languageCodeShort, ofType: "lproj")
    }

    if let path = path, let locBundle = Bundle(path: path) {
        result = locBundle.localizedString(forKey: self, value: nil, table: nil)
    } else {
        result = NSLocalizedString(self, comment: "")
    }
        return result
    }
}

Locale.preferredLanguage = "uk"

label.text = "localizedKey".localized

#15 楼

#define currentLanguageBundle [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:[[NSLocale preferredLanguages] objectAtIndex:0] ofType:@"lproj"]]


#define NSLocalizedString(str,nil) NSLocalizedStringFromTableInBundle(str, nil, currentLanguageBundle, @"")

#16 楼

extern NSBundle* bundle; // Declared on Language.m

#ifdef NSLocalizedString
    #undef NSLocalizedString
    // Delete this line to avoid warning
    #warning "Undefining NSLocalizedString"
#endif

#define NSLocalizedString(key, comment) \
    [bundle localizedStringForKey:(key) value:@"" table:nil]

#17 楼

let languages = ["bs", "zh-Hant", "en", "fi", "ko", "lv", "ms", "pl", "pt-BR", "ru", "sr-Latn", "sk", "es", "tr"]
UserDefaults.standard.set([languages[0]], forKey: "AppleLanguages")

#18 楼

    func localizeString (stringToLocalize: String, language: String) -> String
    {
        let path = Bundle.main.path (forResource: language, ofType: "lproj")
        let languageBundle = Bundle (path: path!)
        return languageBundle! .localizedString (forKey: stringToLocalize, value: "", table: nil)
    }

struct CustomLanguage {

    func createBundlePath () -> Bundle {
        let selectedLanguage = //recover the language chosen by the user (in my case, from UserDefaults)
        let path = Bundle.main.path(forResource: selectedLanguage, ofType: "lproj")
        return Bundle(path: path!)!
    }
}

NSLocalizedString ("StringToLocalize", comment: “")

let customLang = CustomLanguage() //declare at top
let bundleLanguage = customLang.createBundle()

NSLocalizedString("StringToLocalize", tableName: nil, bundle: bundleLanguage, value: "", comment: “”) //use in each String

#19 楼

#20 楼

int main(int argc, char *argv[])
{

    [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"AppleLanguages"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    NSString *lang = [[NSLocale preferredLanguages] objectAtIndex:0];

    if (![lang isEqualToString:@"en"]  &&  ![lang isEqualToString:@"ja"]){

        NSMutableArray *array = [[NSMutableArray alloc] initWithArray:[NSLocale preferredLanguages]];
        [array replaceObjectAtIndex:1 withObject:@"en"];

        [[NSUserDefaults standardUserDefaults] setObject:array forKey:@"AppleLanguages"];
        [[NSUserDefaults standardUserDefaults] synchronize];


    }

    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));


    }


}

#21 楼

NSString *bundlePath = [[NSBundle mainBundle] pathForResource:@"Localizable" ofType:@"strings" inDirectory:nil forLocalization:@"es"];


NSBundle *spanishBundle = [[NSBundle alloc] initWithPath:[bundlePath stringByDeletingLastPathComponent]];

NSLocalizedStringFromTableInBundle(@"House", nil, spanishBundle, nil):

#22 楼

#23 楼

@implementation OSLocalization

+ (NSBundle *)currentLanguageBundle
{
    // Default language incase an unsupported language is found
    NSString *language = @"en";

    if ([NSLocale preferredLanguages].count) {
        // Check first object to be of type "en","es" etc
        // Codes seen by my eyes: "en-US","en","es-US","es" etc

        NSString *letterCode = [[NSLocale preferredLanguages] objectAtIndex:0];

        if ([letterCode rangeOfString:@"en"].location != NSNotFound) {
            // English
            language = @"en";
        } else if ([letterCode rangeOfString:@"es"].location != NSNotFound) {
            // Spanish
            language = @"es";
        } else if ([letterCode rangeOfString:@"fr"].location != NSNotFound) {
            // French
            language = @"fr";
        } // Add more if needed
    }

    return [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]];
}

/// Check if preferred language is English
+ (BOOL)isCurrentLanguageEnglish
{
    if (![NSLocale preferredLanguages].count) {
        // Just incase check for no items in array
        return YES;
    }

    if ([[[NSLocale preferredLanguages] objectAtIndex:0] rangeOfString:@"en"].location == NSNotFound) {
        // No letter code for english found
        return NO;
    } else {
        // Tis English
        return YES;
    }
}

/*  Swap language between English & Spanish
 *  Could send a string argument to directly pass the new language
 */
+ (void)changeCurrentLanguage
{
    if ([self isCurrentLanguageEnglish]) {
        [[NSUserDefaults standardUserDefaults] setObject:@[@"es"] forKey:@"AppleLanguages"];
    } else {
        [[NSUserDefaults standardUserDefaults] setObject:@[@"en"] forKey:@"AppleLanguages"];
    }
}
@end

#24 楼

- (NSString*)L:(NSString*)key
{
    static NSString* valueNotFound = @"VALUE_NOT_FOUND";
    static NSBundle* enBundle = nil;

    NSString* pl = [NSLocale preferredLanguages][0];
    NSString* bp = [[NSBundle mainBundle] pathForResource:pl ofType:@"lproj"];
    NSBundle* b = [NSBundle bundleWithPath:bp];

    NSString* s = [b localizedStringForKey:key value:valueNotFound table:nil];
    if ( [s isEqualToString:valueNotFound] ) {
        if ( !enBundle ) {
            bp = [[NSBundle mainBundle] pathForResource:@"en" ofType:@"lproj"];
            enBundle = [NSBundle bundleWithPath:bp];
        }
        s = [enBundle localizedStringForKey:key value:key table:nil];
    }

    return s;
}

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