在项目里面找到PROJECT-info->Localizations，添加支持的语言
屏幕快照 2018-06-19 上午10.15.31.png
创建.string文件，不要和系统的.string文件重名（Localizable）
屏幕快照 2018-06-19 上午10.35.55.png
选中你创建的.string文件，点击xcode右边栏中的Localization中的按钮，添加需要的语言包
屏幕快照 2018-06-19 上午10.42.01.png
添加完毕后系统会自动帮我们生成对应的语言包文件
屏幕快照 2018-06-19 上午10.44.33.png
在对应的语言包文件中添加需要转换语言的字符串
屏幕快照 2018-06-19 上午10.46.03.png
屏幕快照 2018-06-19 上午10.46.15.png
创建一个工具类来切换语言
#import <Foundation/Foundation.h>
@interface ChangeLanguage : 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
#import "ChangeLanguage.h"
@implementation ChangeLanguage
static NSBundle *bundle = nil;
+ (NSBundle *)bundle {
return bundle;
}
//首次加载时检测语言是否存在
+ (void)initUserLanguage {
NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
NSString *currLanguage = [def valueForKey:@"LocalLanguageKey"];
if (!currLanguage) {
NSArray *preferredLanguages = [NSLocale preferredLanguages];
currLanguage = preferredLanguages[0];
if ([currLanguage hasPrefix:@"en"]) {
currLanguage = @"en";
}else if ([currLanguage hasPrefix:@"zh-Hans"]) {
currLanguage = @"zh-Hans";
}else if ([currLanguage hasPrefix:@"zh-HK"] || [currLanguage hasPrefix:@"zh-Hant"]) {
currLanguage = @"zh-Hant";
}else {
currLanguage = @"zh-Hant";
}
[def setValue:currLanguage forKey:@"LocalLanguageKey"];
[def synchronize];
}
//获取文件路径
NSString *path = [[NSBundle mainBundle] pathForResource:currLanguage ofType:@"lproj"];
bundle = [NSBundle bundleWithPath:path];//生成bundle
}
//获取当前语言
+ (NSString *)userLanguage {
NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
NSString *language = [def valueForKey:@"LocalLanguageKey"];
return language;
}
//设置语言
+ (void)setUserLanguage:(NSString *)language {
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSString *currLanguage = [userDefaults valueForKey:@"LocalLanguageKey"];
if ([currLanguage isEqualToString:language]) {
return;
}
[userDefaults setValue:language forKey:@"LocalLanguageKey"];
[userDefaults synchronize];
NSString *path = [[NSBundle mainBundle] pathForResource:language ofType:@"lproj"];
bundle = [NSBundle bundleWithPath:path];
}
@end
现在可以写一个切换语言的按钮，切换后发送通知，刷新所有一级页面的UI
- (void)actionSheet:(FDActionSheet *)sheet clickedButtonIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) {//简体
[ChangeLanguage setUserLanguage:@"zh-Hans"];
}else if (buttonIndex == 1) {//繁体
[ChangeLanguage setUserLanguage:@"zh-Hant"];
}else if (buttonIndex == 2) {//英语
[ChangeLanguage setUserLanguage:@"en"];
}
[[NSNotificationCenter defaultCenter] postNotificationName:@"changeLanguage"object:self];
}
项目中所有需要转换语言的字符串都要用系统提供的宏来写
NSLocalizedStringFromTableInBundle(@"Change_language", @"Languages", [ChangeLanguage bundle], nil)
第一个参数是要被转换语言的字符串，第二个参数是你创建的.string文件的名称，第三个参数是语言包所在的bundle（在工具类中生成了bundle文件，所以这里固定为[ChangeLanguage bundle]）
在AppDelegate中初始化应用语言，每次启动app都会从本地提取用户上次选定的语种
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//初始化应用语言
[ChangeLanguage initUserLanguage];
[ChangeLanguage setUserLanguage:[ChangeLanguage userLanguage]];
}
