[iOS]如何在iOS開發中切換顯示語言實現國際化

[iOS]如何在iOS開發中切換顯示語言實現國際化

1.在Project設定，添加中英兩種語言：

 

 

2.建立Localizable.strings檔案，作為多語言對應的詞典，儲存多種語言，點擊右側Localization，勾選中英：

 

3.添加一個欄位，

 

在English中，添加：SUBMIT_BTN_TITLE = Go;

在Chinese中，添加：SUBMIT_BTN_TITLE = 開始;
 

4.一個工具類GDLocalizableController，用來切換本地語言：

////  GDLocalizableController.h//  guide-book////  Created by why on 7/16/14.//  Copyright (c) 2014 why. All rights reserved.//#import @interface GDLocalizableController : NSObject+(NSBundle *)bundle;//擷取當前資源檔+(void)initUserLanguage;//初始化語言檔案+(NSString *)userLanguage;//擷取應用當前語言+(void)setUserlanguage:(NSString *)language;//設定當前語言@end////  GDLocalizableController.m//  guide-book////  Created by why on 7/16/14.//  Copyright (c) 2014 why. All rights reserved.//#import GDLocalizableController.h@implementation GDLocalizableControllerstatic NSBundle *bundle = nil;+ ( NSBundle * )bundle{    return bundle;}+(void)initUserLanguage{        NSUserDefaults *def = [NSUserDefaults standardUserDefaults];    NSString *string = [def valueForKey:@userLanguage];    if(string.length == 0){        //擷取系統當前語言版本        NSArray* languages = [def objectForKey:@AppleLanguages];        NSString *current = [languages objectAtIndex:0];        string = current;        [def setValue:current forKey:@userLanguage];        [def synchronize];//持久化，不加的話不會儲存    }        //擷取檔案路徑    NSString *path = [[NSBundle mainBundle] pathForResource:string ofType:@lproj];    bundle = [NSBundle bundleWithPath:path];//產生bundle}+(NSString *)userLanguage{        NSUserDefaults *def = [NSUserDefaults standardUserDefaults];    NSString *language = [def valueForKey:@userLanguage];    return language;}+(void)setUserlanguage:(NSString *)language{        NSUserDefaults *def = [NSUserDefaults standardUserDefaults];        //1.第一步改變bundle的值    NSString *path = [[NSBundle mainBundle] pathForResource:language ofType:@lproj ];    bundle = [NSBundle bundleWithPath:path];        //2.持久化    [def setValue:language forKey:@userLanguage];    [def synchronize];}@end

5. 自訂一個宏方便處理：

 

 

 

// ----- 多語言設定#define CHINESE @zh-Hans#define ENGLISH @en#define GDLocalizedString(key) [[GDLocalizableController bundle] localizedStringForKey:(key) value:@ table:nil]

6.使用：

 

 

    [GDLocalizableController setUserlanguage:CHINESE];    NSLog(GDLocalizedString(@SUBMIT_BTN_TITLE));    [GDLocalizableController setUserlanguage:ENGLISH];    NSLog(GDLocalizedString(@SUBMIT_BTN_TITLE));