上一篇文章了谈到了如何根据本地语言环境显示不同的语言.这一小节着重讲解如何在手动本地切换语言.效果如下:
93YNP.gif
要设置语言,原理比较简单.
切换语言实际上就是去获取每种语言所对应的后缀是.lproj的文件夹.APP切换语言的时候实际上就是去获取这些文件夹下面的STLocalizable.strings文件.想要获取文件key对应的value的时候只需要改变pathForResource后面的名称即可
NSString *path = [[NSBundle mainBundle] pathForResource:@"zh-Hans" ofType:@"lproj"];
NSString *labelString = [[NSBundle bundleWithPath:path] localizedStringForKey:@"label" value:nil table:@"STLocalizable"];
NSLog(@"result: %@", labelString);
//输出:MultiLanguage[1887:72599] result: 标签
在这里贴出两个核心类(亲测可用)
#import <Foundation/Foundation.h>
@interface NSBundle (Language)
+ (void)setLanguage:(NSString *)language;
@end
#import "NSBundle+Language.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 (Language)
+ (void)setLanguage:(NSString *)language {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
object_setClass([NSBundle mainBundle], [BundleEx class]);
});
objc_setAssociatedObject([NSBundle mainBundle], &_bundle, language ? [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]] : nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
@end
#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;
}
//首次加载的时候先检测语言是否存在
+(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"]) {
currLanguage = @"zh-Hans";
}else currLanguage = @"en";
[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
使用的时候很方便,直接创建上面两个类.拖入你的工程项目中
点击切换的时候,注意下面的额language这个参数就是设置的语言.设置之后需要重新刷新界面.我们只需要给当前的keyWindow.rootViewController重新赋值即可.代码如下的.例如
if ([self.chooseLangTextFiled.text isEqualToString:@"简体中文/chinese"]) {
[self changeLanguageTo:@"zh-Hans"];
}
if ([self.chooseLangTextFiled.text isEqualToString:@"英文/english"]) {
[self changeLanguageTo:@"en"];
}
if ([self.chooseLangTextFiled.text isEqualToString:@"缅甸/Burma"]) {
[self changeLanguageTo:@"en"];
}
//更换
- (void)changeLanguageTo:(NSString *)language {
// 设置语言
[NSBundle setLanguage:language];
// 然后将设置好的语言存储好，下次进来直接加载
[[NSUserDefaults standardUserDefaults] setObject:language forKey:@"myLanguage"];
[[NSUserDefaults standardUserDefaults] synchronize];
if (self.loginType.length!=0) {
SJLoginViewController *loginVC=[[SJLoginViewController alloc] init];
YGKNavigationVC *navc=[[YGKNavigationVC alloc] initWithRootViewController:loginVC];
[UIApplication sharedApplication].keyWindow.rootViewController = navc;
}else
{
// 我们要把系统window的rootViewController替换掉
YGKJTabbarVC *tab = [[YGKJTabbarVC alloc] init];
[UIApplication sharedApplication].keyWindow.rootViewController = tab;
// 跳转到设置页
tab.selectedIndex = 2;
}
}
下面是一些常用的方法.一并分享给大家
#define LanguageKey @"appLanguage"
//获取当前语言
[[NSUserDefaults standardUserDefaults] objectForKey:LanguageKey];
//获取首选语言顺序
[NSLocale preferredLanguages];
//获取首选语言第一语言
[[NSLocale preferredLanguages] objectAtIndex:0];
//获取系统所有语言
[NSLocale availableLocaleIdentifiers];
//获取当前语言文件路径
NSString *currentLanguage = [[NSUserDefaults standardUserDefaults] ;objectForKey:LanguageKey];
NSString *path = [[NSBundle mainBundle] pathForResource:currentLanguage ofType:@"lproj"];
//根据key获取当前语言对应的本地字符串(参数value:如果key是nil或key在表中找不到本地化字符串，则返回的值。)
NSString *value = [[NSBundle bundleWithPath:path] localizedStringForKey:@"label" value:nil table:@"TiLocalizable"];
有问题可直接咨询我,欢迎在评论区指出不足,或者优化建议
承接APP,小程序,公众号开发. 性价比高.+V信:17723566468 有单子也可找我一起做哦
