参考：https://stackoverflow.com/questions/9416923/ios-how-to-change-app-language-programmatically-without-restarting-the-app
核心是使用
NSString *path = [[NSBundle mainBundle]pathForResource:currentLanguage ofType:@"lproj"];
if (path) {
localeBundle = [NSBundle bundleWithPath:path];
}else{
localeBundle= [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:@"en" ofType:@"lproj" ]];
}
改变localeBundle的值
思路：
1.使用
NSLocalizedStringFromTableInBundle(@"TNC_title", nil, localeBundle] , @""),
可以实时变换不同的国际化文件
*国际化文件一般在文件目录系统是放在lproj后缀的文件夹中的：形式如zh-Hant.lproj（繁体）zh-Hants.lproj（简体）en.lproj（英文）
因此在上文的pathForResource:currentLanguage中也需要对应相应的文件名。
2.再刷新一遍UI的text获取
基于项目的代码示例：
建一个工具类.h：
#import@interface LanguageTool : NSObject +(instancetype)getInstance; - (NSBundle *)getLocaleBundle; -(NSString *)getTap; -(NSString *)getCurrentLanguage; -(void)changeLanguage:(NSString*)language; @end
.m:
#import "LanguageTool.h"
#import "SessionManager.h"
#define CNS @"zh"
#define EN @"en"
#define tap @"change_language"
static NSBundle *localeBundle = nil;
static NSString *currentLanguage = nil;
@interface LanguageTool()
@end
@implementation LanguageTool
//单例
+(instancetype)getInstance{
static LanguageTool *manager = nil;
static dispatch_once_t onceToken = 0;
dispatch_once(&onceToken, ^{
manager = [[LanguageTool alloc] init];
});
return manager;
}
-(void)changeLanguage:(NSString*)language{
currentLanguage = language;
NSString *path = [[NSBundle mainBundle]pathForResource:language ofType:@"lproj"];
if (path && ![@"en" isEqualToString:language]) {
localeBundle = [NSBundle bundleWithPath:path];
}else{
localeBundle = [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:@"en" ofType:@"lproj" ]];
}
}
//这个方法的目的是，如果什么都没有选择，就使用系统默认语言，否则使用用户选择的语言，并且不会因为关闭app而改变。
-(void)judgeLanguage{
//Get last change language
NSString *lastChangeLanguage = nil;
//使用一个持久化，保持上次的语言选择
lastChangeLanguage = [SessionManager getSession:[SessionManager getLastLanguageTap]];
NSLog(@"last chage language: %@",lastChangeLanguage);
//语言优先级：currentLanguage > lastChangeLanguage > system default language
//user 没有设定语言时：获取系统默认语言
if (!lastChangeLanguage) {
if (!currentLanguage) {
//获取系统默认语言：
//截取：zh-Hant-HK 去掉区域保留：zh-Hant
NSLog(@"-------system language:%@",[NSLocale preferredLanguages][0]);
currentLanguage = [[NSLocale preferredLanguages][0] substringToIndex:2];
if ([currentLanguage containsString:@"zh"]) {
currentLanguage = [NSString stringWithFormat:@"%@%@",currentLanguage,@"-Hant"];
}
}
}else if(!currentLanguage){
//当前没有切换语言，app内有设定语言，优先app内语言
currentLanguage = lastChangeLanguage;
}
}
- (NSBundle *)getLocaleBundle{
[self judgeLanguage];
NSLog(@"------current language :%@",currentLanguage);
NSLog(@"-------system language:%@",[NSLocale preferredLanguages][0]);
NSString *path = [[NSBundle mainBundle]pathForResource:currentLanguage ofType:@"lproj"];
if (path) {
localeBundle = [NSBundle bundleWithPath:path];
}else{
localeBundle= [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:@"en" ofType:@"lproj" ]];
}
return localeBundle;
}
//标记
-(NSString *)getTap{
return tap;
}
-(NSString *)getCurrentLanguage{
// if (!currentLanguage) {
// //截取：zh-Hant-HK 去掉区域保留：zh-Hant
// currentLanguage = [[NSLocale preferredLanguages][0] substringToIndex:2];
// }
[self judgeLanguage];
NSLog(@"current language:%@",currentLanguage);
return currentLanguage;
}
@end
使用在需要切换语言的地方点击后调用：
//如果当前是英语就切换成繁体
if ([@"en" isEqualToString:[[LanguageTool getInstance] getCurrentLanguage]]) {
[self changeLanguage:@"zh-Hant"];
} else {
[self changeLanguage:@"en"];
}
//通知其他页面也切换语言
[self callLanguageChangeNotificationReceiver];
-(void)changeLanguage:(NSString*)language{
[[LanguageTool getInstance] changeLanguage:language];
//刷新某些UI text
[self initTableResource];
[_tableView reloadData];
}
//例如这样刷新：
-(void)initTableResource{
_dataArray = @[NSLocalizedStringFromTableInBundle(@"Home", nil, [[LanguageTool getInstance] getLocaleBundle] , @""),
NSLocalizedStringFromTableInBundle(@"customization", nil, [[LanguageTool getInstance] getLocaleBundle] , @"")
,
NSLocalizedStringFromTableInBundle(@"TNC_title", nil, [[LanguageTool getInstance] getLocaleBundle] , @""),
NSLocalizedStringFromTableInBundle(@"localizable", nil, [[LanguageTool getInstance] getLocaleBundle] , @"")];
NSString *app_version = [[[NSBundle mainBundle]infoDictionary] objectForKey:@"CFBundleShortVersionString"];
_app_version_string = [NSString stringWithFormat:@"%@ %@",NSLocalizedStringFromTableInBundle(@"slider_version_info", nil, [[LanguageTool getInstance] getLocaleBundle] , @""),app_version];
if (_version_label) {
_version_label.text = _app_version_string;
}
[self initContentVersionLabel];
}
//设置通知：
-(void)callLanguageChangeNotificationReceiver{
[SessionManager setSession:[SessionManager getLastLanguageTap]
value:[[LanguageTool getInstance] getCurrentLanguage]];
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
[center postNotificationName:[[LanguageTool getInstance] getTap] object:nil];
}
被通知的页面接收通知，并刷新一下UI，操作并不复杂：
-(void)initNotification{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshTextView) name:[[LanguageTool getInstance]getTap] object:nil];
}
-(void)refreshTextView{
_tncTextView.text = NSLocalizedStringFromTableInBundle(@"TNC_text", nil, [[LanguageTool getInstance] getLocaleBundle] , @"");
_navItem.title = NSLocalizedStringFromTableInBundle(@"TNC_title", nil, [[LanguageTool getInstance] getLocaleBundle] , @"");
}
资料：
1.http://blog.csdn.net/feng2qing/article/details/60479620