前言

关于多语言国际化的介绍，现在越来越多的App走向国际，因此多语言/国际化就变得比较常见，我呢比较喜欢偷懒，也比较喜欢整理，因此我封装了一套下面的工具来方便大家一起使用。

关于怎么去配置国际化的信息，我就不做多余的赘述，这些文章就挺详细 iOS 国际化开发、3分钟实现iOS语言本地化/国际化

Xib快捷显示：

简单说明工具类

1、KJLoadLanguageViewController：简单的切换加载控制器

2、NSBundle+KJLanguage：工具的核心，当前语言获取和设置

3、UIButton+KJLanguage：按钮多语言

4、UILabel+KJLanguage：文本多语言

5、UITextField+KJLanguage：TextField多语言

分别介绍每个类对应的 API & Property

一、KJLoadLanguageViewController

@interface KJLoadLanguageViewController : UIViewController
@property(nonatomic,strong)UIActivityIndicatorView *indicatorView;
@property(nonatomic,assign)CGFloat time;
@property(nonatomic,readwrite,copy)void(^loadEnd)(void);
@end

indicatorView：系统自带加载控件

time：加载时间

loadEnd：加载结束的回调处理

二、NSBundle+KJLanguage

这个是本工具的核心，那么我就多介绍一下，先看看 API & Property

/// 自定义strings文件，默认Localizable.strings
@property(nonatomic,strong,class)NSString *customStringsName;
/// 当前语言
@property(nonatomic,strong,readonly,class)NSString *currentLanguage;
/// 设置语言，传nil恢复系统默认语言
+ (void)kj_setCurrentLanguage:(NSString*_Nullable)language complete:(void(^_Nullable)(void))complete;
/// 切换动画，备注Xib设置的多语言会自动切换
+ (void)kj_switchoverLanguage:(UIViewController*(^_Nullable)(KJLoadLanguageViewController *loadvc))block complete:(void(^_Nullable)(void))complete;

customStringsName：自定义strings文件，默认Localizable.strings，这个主要是后面控件使用，如果你的strings文件名字不是Localizable而是自定义的话，那么你就得使用NSLocalizedStringFromTable来读取本地化字符串

if (NSBundle.customStringsName) {
    self.text = NSLocalizedStringFromTable(LocalizedKey,NSBundle.customStringsName,nil);
}else{
    self.text = NSLocalizedString(LocalizedKey, nil);
}

currentLanguage：获取App当前语言，这个其实是存储在NSUserDefaults当中，多说一句这个语言并不是App系统语言，而是用户设置语言，当然第一次未设置的时候则取App系统语言

static NSString *kAppLanguageKey = @"KJ_CURRENT_LANGUAGE_KEY";
+ (NSString*)currentLanguage{
    NSString *language = [[NSUserDefaults standardUserDefaults] objectForKey:kAppLanguageKey];
    if (language == nil) {
        language = [[NSLocale preferredLanguages] firstObject];
    }
    return language;
}

kj_setCurrentLanguage:complete:：设置语言，传nil恢复系统默认语言，中文zh-Hans、英文en，其他的按这种格式就行

+ (void)kj_setCurrentLanguage:(NSString*)language complete:(void(^)(void))complete{
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    if (language) {
        [userDefaults setObject:language forKey:kAppLanguageKey];
    }else{
        [userDefaults removeObjectForKey:kAppLanguageKey];
    }
    [userDefaults synchronize];
    if (complete) complete();
}

kj_switchoverLanguage:complete:：我封装的一款简单的切换动画，当然你觉得不好看什么的，你可以自己选择，KJLoadLanguageViewController控制器可以用来承载你想要的切换动画效果

/// 切换动画，自带菊花加载界面
+ (void)kj_switchoverLanguage:(UIViewController*(^)(KJLoadLanguageViewController *loadvc))block complete:(void(^)(void))complete{
    if (block) {
        KJLoadLanguageViewController *__vc = [KJLoadLanguageViewController new];
        __vc.time = .5;
        __block UIViewController *vc = block(__vc);
        if (vc) {
            __vc.loadEnd = ^{
                [vc.view.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
                    if ([obj isKindOfClass:[UIButton class]]) {
                        UIButton *button = (UIButton*)obj;
                        button.LocalizedKey = button.LocalizedKey;
                        button.SelectedKey = button.SelectedKey;
                        button.DisabledKey = button.DisabledKey;
                        button.HighlightedKey = button.HighlightedKey;
                    }else if ([obj isKindOfClass:[UILabel class]]) {
                        UILabel *label = (UILabel*)obj;
                        label.LocalizedKey = label.LocalizedKey;
                    }else if ([obj isKindOfClass:[UITextField class]]) {
                        UITextField *textField = (UITextField*)obj;
                        textField.LocalizedKey = textField.LocalizedKey;
                    }
                }];
                if (complete) complete();
            };
            [vc presentViewController:__vc animated:NO completion:nil];
        }
    }
}

简单使用如下，

[NSBundle kj_switchoverLanguage:^UIViewController * _Nonnull(KJLoadLanguageViewController * _Nonnull loadvc) {
    loadvc.view.backgroundColor = [UIColor.greenColor colorWithAlphaComponent:0.3];
    return weakself;
} complete:^{
    [changebutton setTitle:NSLocalizedString(@"changeLanguage", nil) forState:UIControlStateNormal];
}];

内部处理

介绍完API，我再来说说实现吧，

国际化其实就是走该方法localizedStringForKey:value:table:

/// 国际化
- (NSString*)localizedStringForKey:(NSString*)key value:(NSString*)value table:(NSString*)tableName{
    NSBundle *bundle = [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:NSBundle.currentLanguage ofType:@"lproj"]];
    if (bundle) {
        return [bundle localizedStringForKey:key value:value table:tableName];
    }else{
        return [super localizedStringForKey:key value:value table:tableName];
    }
}

在load方法中采用动态继创建子类KJLanguageBundle调用国际化方法localizedStringForKey:value:table:

+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        // 动态继承修改[NSBundle mainBundle]对象的isa指针使其指向子类，便可以调用子类的方法
// 在运行时创建新的子类，并添加新的方法
        object_setClass([NSBundle mainBundle], [KJLanguageBundle class]);
    });
}

自定义strings文件，我采用类属性来设置，runtime关联实现

+ (NSString*)customStringsName{
    return objc_getAssociatedObject(self, @selector(customStringsName));
}
+ (void)setCustomStringsName:(NSString*)customStringsName{
    objc_setAssociatedObject(self, @selector(customStringsName), customStringsName, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

三、UIButton+KJLanguage

暂时我提供4种Api，IBInspectable用来支持Xib快捷设置（偷懒偷的更彻底- -!）

LocalizedKey：Normal状态下的文字

SelectedKey：选中状态下的文字

DisabledKey：不可操作状态下的文字

HighlightedKey：高亮状态下的文字

- (NSString*)LocalizedKey{
    return objc_getAssociatedObject(self, @selector(LocalizedKey));;
}
- (void)setLocalizedKey:(NSString*)LocalizedKey{
    objc_setAssociatedObject(self, @selector(LocalizedKey), LocalizedKey, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    if (LocalizedKey == nil) return;
    if (NSBundle.customStringsName) {
        [self setTitle:NSLocalizedStringFromTable(LocalizedKey,NSBundle.customStringsName,nil) forState:UIControlStateNormal];
    }else{
        [self setTitle:NSLocalizedString(LocalizedKey, nil) forState:UIControlStateNormal];
    }
}
- (NSString*)HighlightedKey{
    return objc_getAssociatedObject(self, @selector(HighlightedKey));;
}
- (void)setHighlightedKey:(NSString*)HighlightedKey{
    objc_setAssociatedObject(self, @selector(HighlightedKey), HighlightedKey, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    if (HighlightedKey == nil) return;
    if (NSBundle.customStringsName) {
        [self setTitle:NSLocalizedStringFromTable(HighlightedKey,NSBundle.customStringsName,nil) forState:UIControlStateHighlighted];
    }else{
        [self setTitle:NSLocalizedString(HighlightedKey, nil) forState:UIControlStateHighlighted];
    }
}
- (NSString*)SelectedKey{
    return objc_getAssociatedObject(self, @selector(SelectedKey));;
}
- (void)setSelectedKey:(NSString*)SelectedKey{
    objc_setAssociatedObject(self, @selector(SelectedKey), SelectedKey, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    if (SelectedKey == nil) return;
    if (NSBundle.customStringsName) {
        [self setTitle:NSLocalizedStringFromTable(SelectedKey,NSBundle.customStringsName,nil) forState:UIControlStateSelected];
    }else{
        [self setTitle:NSLocalizedString(SelectedKey, nil) forState:UIControlStateSelected];
    }
}
- (NSString*)DisabledKey{
    return objc_getAssociatedObject(self, @selector(DisabledKey));;
}
- (void)setDisabledKey:(NSString*)DisabledKey{
    objc_setAssociatedObject(self, @selector(DisabledKey), DisabledKey, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    if (DisabledKey == nil) return;
    if (NSBundle.customStringsName) {
        [self setTitle:NSLocalizedStringFromTable(DisabledKey,NSBundle.customStringsName,nil) forState:UIControlStateDisabled];
    }else{
        [self setTitle:NSLocalizedString(DisabledKey, nil) forState:UIControlStateDisabled];
    }
}

支持Xib快捷设置，右边为对应的Key

Demo对应的Key

"textLabel" = "当前语言为中文";
"textFieldPlaceholder" = "测试textField";
"textButtonDefault" = "按钮正常状态";
"textButtonSelect" = "按钮选中状态";
"textButtonHighliaght" = "按钮高亮状态";
"textButtonDisable" = "按钮不可操作状态";
"changeLanguage" = "切换语言";

四、UILabel+KJLanguage 和 UITextField+KJLanguage

这两其实差不多，UITextField设置placeholder属性，UILabel设置text属性

- (NSString*)LocalizedKey{
    return objc_getAssociatedObject(self, @selector(LocalizedKey));;
}
- (void)setLocalizedKey:(NSString*)LocalizedKey{
    objc_setAssociatedObject(self, @selector(LocalizedKey), LocalizedKey, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    if (LocalizedKey == nil) return;
    if (NSBundle.customStringsName) {
        self.placeholder = NSLocalizedStringFromTable(LocalizedKey,NSBundle.customStringsName,nil);
    }else{
        self.placeholder = NSLocalizedString(LocalizedKey, nil);
    }
}

使用示例

到此基本就介绍的差不多了，大致使用如下

#import "KJLanguageVC.h"
#import "NSBundle+KJLanguage.h"
@interface KJLanguageVC ()
@property (weak, nonatomic) IBOutlet UIButton *button;
@end
@implementation KJLanguageVC
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    _weakself;
    [self.button kj_addAction:^(UIButton * _Nonnull kButton) {
        kButton.selected = !kButton.selected;
    }];
    __block UIButton *changebutton = [[UIButton alloc] initWithFrame:CGRectMake(0, kScreenH - 60, kScreenW-150, 40)];
    [self.view addSubview:changebutton];
    changebutton.centerX = kScreenW/2;
    changebutton.backgroundColor = UIColor.whiteColor;
    changebutton.layer.borderWidth = 1;
    changebutton.layer.borderColor = UIColor.blueColor.CGColor;
    changebutton.layer.masksToBounds = YES;
    changebutton.layer.cornerRadius = 5;
    changebutton.titleLabel.font = [UIFont systemFontOfSize:14];
    [changebutton setTitle:NSLocalizedString(@"changeLanguage", nil) forState:UIControlStateNormal];
    [changebutton setTitleColor:UIColor.blueColor forState:UIControlStateNormal];
    [changebutton kj_addAction:^(UIButton * _Nonnull kButton) {
        NSString *language = NSBundle.currentLanguage;
        if ([language isEqualToString:@"en"]) {
            language = @"zh-Hans";
        }else{
            language = @"en";
        }
        [NSBundle kj_setCurrentLanguage:language complete:nil];
        [NSBundle kj_switchoverLanguage:^UIViewController * _Nonnull(KJLoadLanguageViewController * _Nonnull loadvc) {
            loadvc.view.backgroundColor = [UIColor.greenColor colorWithAlphaComponent:0.3];
            return weakself;
        } complete:^{
            [changebutton setTitle:NSLocalizedString(@"changeLanguage", nil) forState:UIControlStateNormal];
        }];
    }];
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/
@end

End

到此就差不多了，粗略封装，望大神补充

该工具我也提交到Pod上，使用 pod 'KJEmitterView/Language' # 多语言模块

iOS 多语言快捷设置Xib设置

前言

Xib快捷显示：

简单说明工具类

分别介绍每个类对应的 API & Property

一、KJLoadLanguageViewController

二、NSBundle+KJLanguage

内部处理

三、UIButton+KJLanguage

四、UILabel+KJLanguage 和 UITextField+KJLanguage

使用示例

End

备注：本文用到的部分函数方法和Demo，均来自三方库KJEmitterView，如有需要的朋友可自行`pod 'KJEmitterView'`引入即可

多语言介绍就到此完毕，后面有相关再补充，写文章不容易，还请点个小星星传送门

热门文章

最新文章

相关电子书

iOS 多语言快捷设置Xib设置

前言

Xib快捷显示：

简单说明工具类

分别介绍每个类对应的 API & Property

一、KJLoadLanguageViewController

二、NSBundle+KJLanguage

内部处理

三、UIButton+KJLanguage

四、UILabel+KJLanguage 和 UITextField+KJLanguage

使用示例

End

备注：本文用到的部分函数方法和Demo，均来自三方库**KJEmitterView**，如有需要的朋友可自行pod 'KJEmitterView'引入即可

多语言介绍就到此完毕，后面有相关再补充，写文章不容易，还请点个**小星星**传送门

热门文章

最新文章

相关电子书

备注：本文用到的部分函数方法和Demo，均来自三方库KJEmitterView，如有需要的朋友可自行`pod 'KJEmitterView'`引入即可

多语言介绍就到此完毕，后面有相关再补充，写文章不容易，还请点个小星星传送门