iOS开发Xcode中切换显示语言实现国际化

1.在Project设置，添加中英两种语言：

2.新建Localizable.strings文件，作为多语言对应的词典，存储多种语言，点击右侧Localization，勾选中英：

3.添加一个字段，

在English中，添加：SUBMIT_BTN_TITLE = Go;

在Chinese中，添加：SUBMIT_BTN_TITLE = 开始;

4.一个工具类GDLocalizableController，用来切换本地语言：

//
//  GDLocalizableController.h
//  guide-book
//
//  Created by why on 7/16/14.
//  Copyright (c) 2014 why. All rights reserved.
//
 
#import <foundation foundation.h="">
 
@interface GDLocalizableController : NSObject
 
+(NSBundle *)bundle;//获取当前资源文件
 
+(void)initUserLanguage;//初始化语言文件
 
+(NSString *)userLanguage;//获取应用当前语言
 
+(void)setUserlanguage:(NSString *)language;//设置当前语言
 
@end
 
 
 
 
 
 
//
//  GDLocalizableController.m
//  guide-book
//
//  Created by why on 7/16/14.
//  Copyright (c) 2014 why. All rights reserved.
//
 
#import GDLocalizableController.h
 
@implementation GDLocalizableController
 
static NSBundle *bundle = nil;
 
+ ( NSBundle * )bundle{
    return bundle;
}
+(void)initUserLanguage{
     
    NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
    NSString *string = [def valueForKey:@userLanguage];
    if(string.length == 0){
        //获取系统当前语言版本
        NSArray* languages = [def objectForKey:@AppleLanguages];
        NSString *current = [languages objectAtIndex:0];
        string = current;
        [def setValue:current forKey:@userLanguage];
        [def synchronize];//持久化，不加的话不会保存
    }
     
    //获取文件路径
    NSString *path = [[NSBundle mainBundle] pathForResource:string ofType:@lproj];
    bundle = [NSBundle bundleWithPath:path];//生成bundle
}
 
+(NSString *)userLanguage{
     
    NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
    NSString *language = [def valueForKey:@userLanguage];
    return language;
}
 
+(void)setUserlanguage:(NSString *)language{
     
    NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
     
    //1.第一步改变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</foundation>

5. 自定义一个宏方便处理：

 
// ----- 多语言设置
#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));