對bundle擴展
直接貼代碼
.h文件

//
//  NSBundle+KdLocalBundle.h
//  QooCam
//
//  Created by bob bob on 2023/9/8.//#import <Foundation/Foundation.h>NS_ASSUME_NONNULL_BEGIN@interface NSBundle (KdLocalBundle)@end
@interface KdLocalBundle:NSBundle@end
@interface CLLanguageManager : NSObject
+ (void)setUserLanguage:(NSString *)userLanguage;
+ (NSString *)userLanguage;
+ (void)resetSystemLanguage;
+(void)setEnglishFirst;
+ (void)setLanguage:(NSString *)language;
@end
NS_ASSUME_NONNULL_END

.m文件

//
//  NSBundle+KdLocalBundle.m
//  QooCam
//
//  Created by bob bob on 2023/9/8.//#import "NSBundle+KdLocalBundle.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 (KdLocalBundle)
+(void)load{static dispatch_once_t onceToken;dispatch_once(&onceToken, ^{object_setClass([NSBundle mainBundle], [KdLocalBundle class]);});
}@end@implementation KdLocalBundle
//- (NSString *)localizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName {
// if ([KdLocalBundle cl_mainBundle]) {
//  return [[KdLocalBundle cl_mainBundle] localizedStringForKey:key value:value table:tableName];
// } else {
//  return [super localizedStringForKey:key value:value table:tableName];
// }
//}
- (NSString *)localizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName {NSBundle *bundle = objc_getAssociatedObject(self, &_bundle);NSString *retSt = bundle ? [bundle localizedStringForKey:key value:value table:tableName] : [super localizedStringForKey:key value:value table:tableName];if([retSt componentsSeparatedByString:@"_"].count >=3){KdLog(@"包含沒有處理的多語言key： %@",retSt);
//        NSAssert(false, @"contain not handle key %@",retSt);//如果沒有這個就強制顯示英文，默認英文是有的retSt = [self englishBundelStrFromKey:key value:value table:tableName];}return  retSt;}-(NSString *)englishBundelStrFromKey:(NSString*)key value:(NSString *)value table:(NSString *)tableName{NSString *path = [[NSBundle mainBundle] pathForResource:@"en" ofType:@"lproj"];NSBundle *englishBundel = [NSBundle bundleWithPath:path];NSString *valueStr = englishBundel ? [englishBundel localizedStringForKey:key value:value table:tableName] : [super localizedStringForKey:key value:value table:tableName];if([valueStr componentsSeparatedByString:@"_"].count >=3){
//        NSAssert(false, @"英語也不包含的key必須要處理了 %@",valueStr);valueStr = @"";}return valueStr;
}+ (NSBundle *)cl_mainBundle {if ([KdLocalBundle currentLanguage].length) {NSString *path = [[NSBundle mainBundle] pathForResource:[KdLocalBundle currentLanguage] ofType:@"lproj"];if (path.length) {return [NSBundle bundleWithPath:path];}}return nil;
}+ (NSString *)currentLanguage {return [NSLocale preferredLanguages].firstObject;
// return [CLLanguageManager userLanguage] ? : [NSLocale preferredLanguages].firstObject;
}@end@implementation CLLanguageManager
#define CLUserLanguageKey @"kd_CLUserLanguageKey"
+ (void)setLanguage:(NSString *)language {static dispatch_once_t onceToken;dispatch_once(&onceToken, ^{object_setClass([NSBundle mainBundle], [BundleEx class]);});/**objc_setAssociatedObject來把一個對象與另外一個對象進行關聯。該函數需要四個參數：源對象，關鍵字，關聯的對象和一個關聯策略。*關鍵字是一個void類型的指針。每一個關聯的關鍵字必須是唯一的。通常都是會采用靜態變量來作為關鍵字。*/objc_setAssociatedObject([NSBundle mainBundle], &_bundle, language ? [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]] : nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
+ (void)setUserLanguage:(NSString *)userLanguage {//跟隨手機系統if (!userLanguage.length) {[self resetSystemLanguage];return;}//用戶自定義[[NSUserDefaults standardUserDefaults] setValue:userLanguage forKey:CLUserLanguageKey];[[NSUserDefaults standardUserDefaults] setValue:@[userLanguage] forKey:@"AppleLanguages"];[[NSUserDefaults standardUserDefaults] synchronize];
}+ (NSString *)userLanguage {return [[NSUserDefaults standardUserDefaults] valueForKey:CLUserLanguageKey];
}/**重置系統語言*/
+ (void)resetSystemLanguage {[[NSUserDefaults standardUserDefaults] removeObjectForKey:CLUserLanguageKey];[[NSUserDefaults standardUserDefaults] setValue:nil forKey:@"AppleLanguages"];[[NSUserDefaults standardUserDefaults] synchronize];
}
//如果當前設置的語言不支持的話強制轉英文，不然操作系統會默認第二選擇語言
+(void)setEnglishFirst{NSMutableArray *userDefaultLanguages = [[NSUserDefaults standardUserDefaults]objectForKey:@"AppleLanguages"];NSString *firstLanguage = userDefaultLanguages.firstObject;NSLog(@"國際化語言%@",firstLanguage);//目前中日英，默認英文if(!([firstLanguage.lowercaseString hasPrefix:@"en-"] ||[firstLanguage.lowercaseString hasPrefix:@"zh-hans"] ||[firstLanguage.lowercaseString hasPrefix:@"ja-"] || [firstLanguage.lowercaseString hasPrefix:@"zh-hant"]||[firstLanguage.lowercaseString hasPrefix:@"fr-"]||[firstLanguage.lowercaseString hasPrefix:@"de-"]||[firstLanguage.lowercaseString hasPrefix:@"it-"]||[firstLanguage.lowercaseString hasPrefix:@"ko-"]||[firstLanguage.lowercaseString hasPrefix:@"ru-"]||[firstLanguage.lowercaseString hasPrefix:@"es-"]||[firstLanguage.lowercaseString hasPrefix:@"tr-"])){[CLLanguageManager setLanguage:@"en"];}
}@end