为什么需要更改语言才能在目标C中重新启动应用程序

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问题描述

我是iOS的新手，我在语言转换方面遇到了问题

I am new in iOS and I am facing problem in language conversion

对于英语，我正在使用类似的代码

For English I am using code like this

 [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"en", nil] forKey:@"AppleLanguages"];
            [[NSUserDefaults standardUserDefaults]synchronize];

            //to set the selected language at runtime (dynamically)
            NSLog(@"Language set=Malay");
            [NSBundle setLanguage:@"en"];
            MenuScreen *menu=[[MenuScreen alloc] initWithNibName:@"MenuScreen" bundle:nil];
            [self.navigationController pushViewController:menu animated:YES];

对于泰语，我使用了这样的代码

For Thai Language I used code like this

[[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"th-TH", nil] forKey:@"AppleLanguages"];
            [[NSUserDefaults standardUserDefaults]synchronize];

            //to set the selected language at runtime (dynamically)
            NSLog(@"Language set=Malay");
            [NSBundle setLanguage:@"th-TH"];
            MenuScreen *menu=[[MenuScreen alloc] initWithNibName:@"MenuScreen" bundle:nil];
            [self.navigationController pushViewController:menu animated:YES];

但是每次需要重新启动应用程序时.是否有解决方案或我做错了什么.在此先感谢！

But every time it required to restart app. Is there is any solution for this or any thing I am doing wrong.Thanks in Advance!

推荐答案

Muju我创建了示例项目，并努力为您的问题找到解决方案.我完美地找到了解决方案.

Muju I created sample project and I worked getting solution for your question.I got the solution perfectly.

在下面的示例中，我要将"欢迎来到泰国"更改为ยtoนดีต้อนรับสู่ประเทศไทย".为此，我使用了本地化概念.

In my below sample I want to change "Welcome to Thailand" to "ยินดีต้อนรับสู่ประเทศไทย".I use localization concept for this.

在执行步骤之前，我希望您了解我的情节提要设计

Before going to steps, I want you to see my storyboard designing

请按照以下步骤操作.

步骤1:单击项目"->信息"->本地化"->单击+

现在它显示语言的下拉列表.从中我们应该选择泰语

第2步:选择或从下拉列表中选择语言后，它将显示以下窗口，我们需要单击完成"按钮

现在看起来像下面

步骤3:为本地化创建字符串文件并设置名称.

以上，我将String文件名设置为LocalizationThai

above I set String file name as LocalizationThai

步骤4:单击LocalizationThai.字符串也单击File Inspector.单击File Inspector内部的Localization.现在它显示以下弹出框.

步骤5:单击本地化".完成本地化后，它会显示在下面

步骤6:点击3个复选框

现在捆绑包中，我们在LocalizationThai.strings下有3个文件

Now in bundle we have 3 files under LocalizationThai.strings

步骤7:在字符串文件中写入所需的更改文本.

i.我在LocalizationThai.strings(Thai)文件中写在文本下方

i.In LocalizationThai.strings(Thai) file I write below text

ii.在LocalizationThai.strings(英文)文件中，我在文本下方写上

ii.In LocalizationThai.strings(English) file I write below text

iii.在LocalizationThai.strings(Base)文件中，我在文本下方写上

iii.In LocalizationThai.strings(Base) file I write below text

步骤8:为多种语言创建头文件.

第9步:设置标题名称(我将标题名称设置为LocalizationHeader)并在标题文件中定义语言，如下所示

LocalizationHeader.h

#ifndef LocalizationHeader_h
#define LocalizationHeader_h


#define ENGLISH 0
#define THAI 1


#endif /* LocalizationHeader_h */

第10步:实施以下编码部分

Localization.h

#import <Foundation/Foundation.h>
#import "LocalizationHeader.h"
@interface Localization : NSObject
+(Localization *)sharedInstance;
+(NSString*) strSelectLanguage:(int)curLang;
+(NSString*) languageSelectedStringForKey:(NSString*) key;
@end

Localization.m

#import "Localization.h"
int currentLanguage,selectedrow;
@implementation Localization

+(Localization *)sharedInstance
{
    static Localization *sharedInstance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance = [[Localization alloc] init];
    });
    return sharedInstance;
}


+(NSString*) strSelectLanguage:(int)curLang{
    if(curLang==THAI){
        [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"th", nil]forKey:@"AppleLanguages"];
    }
    else{
        [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"en", nil]forKey:@"AppleLanguages"];
    }
    [[NSUserDefaults standardUserDefaults] synchronize];
    currentLanguage=curLang;
    NSString *strLangSelect = [[[NSUserDefaults standardUserDefaults]objectForKey:@"AppleLanguages"] objectAtIndex:0];
    return strLangSelect;
}

+(NSString*) languageSelectedStringForKey:(NSString*) key
{
    NSString *path;
    NSString *strSelectedLanguage = [[[NSUserDefaults standardUserDefaults]objectForKey:@"AppleLanguages"] objectAtIndex:0];
    //When we check with iPhone,iPad device it shows "en-US".So we need to change it to "en"
    if([strSelectedLanguage hasPrefix:@"en-"])
        strSelectedLanguage = [strSelectedLanguage stringByReplacingOccurrencesOfString:@"en-US" withString:@"en"];
    if([strSelectedLanguage isEqualToString:[NSString stringWithFormat: @"en"]]){
        currentLanguage=ENGLISH;
        selectedrow=ENGLISH;
        path = [[NSBundle mainBundle] pathForResource:@"en" ofType:@"lproj"];
    }
    else{
        currentLanguage=THAI;
        selectedrow=THAI;
        path = [[NSBundle mainBundle] pathForResource:@"th" ofType:@"lproj"];
    }
    NSBundle* languageBundle = [NSBundle bundleWithPath:path];
    NSString* str=[languageBundle localizedStringForKey:key value:@"" table:@"LocalizationThai"];
    return str;
}
@end

ViewController.h

#import <UIKit/UIKit.h>
#import "Localization.h"
@interface ViewController : UIViewController{
    Localization *localization;

}
@property (strong, nonatomic) IBOutlet UILabel *lblWelcome;
- (IBAction)actionChangeLanToThai:(id)sender;
- (IBAction)actionChangeLangToEng:(id)sender;
@end

ViewController.m

#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize lblWelcome;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    localization = [Localization sharedInstance];
    lblWelcome.text = [Localization languageSelectedStringForKey:@"Welcome to Thailand"];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)actionChangeLanToThai:(id)sender {
    [Localization strSelectLanguage:THAI];
    lblWelcome.text = [Localization languageSelectedStringForKey:@"Welcome to Thailand"];

}

- (IBAction)actionChangeLangToEng:(id)sender {
    [Localization strSelectLanguage:ENGLISH];
    lblWelcome.text = [Localization languageSelectedStringForKey:@"Welcome to Thailand"];
}
@end

当我第一次运行该应用程序

When I run the app first

然后当我将语言从英语更改为泰语

Then When I change the Language from English to Thai

再次将其更改为英语

您必须对XIB遵循相同的步骤

You have to follow the same steps for XIB

以下是XIB

我用XIB创建了ViewController.ViewController的名字是RootViewController

I create the ViewController with XIB.ViewController name is RootViewController

现在请参阅设计部分

Now see the designing part

AppDelegate.h

#import <UIKit/UIKit.h>
#import "RootViewController.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong,nonatomic) RootViewController *viewController;
@end

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.viewController = [[RootViewController alloc] initWithNibName:@"RootViewController" bundle:nil];
    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
    self.window.rootViewController = navController;
    [navController setNavigationBarHidden:YES];
    [self.window makeKeyAndVisible];
    return YES;     
  }

RootViewController.h

 #import <UIKit/UIKit.h>
 #import "Localization.h"
 @interface RootViewController : UIViewController{
    Localization *localization;
 }
 @property (strong, nonatomic) IBOutlet UILabel *lblWelcomeThaiLang;
 - (IBAction)actionChangeLangToThai:(id)sender;
 - (IBAction)actionChangeLangToEng:(id)sender;
 @end

RootViewController.m

 #import "RootViewController.h"
 @interface RootViewController ()
 @end
 @implementation RootViewController
 @synthesize lblWelcomeThaiLang;
 - (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
 }
 - (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
 }
 - (IBAction)actionChangeLangToThai:(id)sender {
    [Localization strSelectLanguage:THAI];
    lblWelcomeThaiLang.text = [Localization languageSelectedStringForKey:@"Welcome to Thailand"];
 }
 - (IBAction)actionChangeLangToEng:(id)sender {
    [Localization strSelectLanguage:ENGLISH];
    lblWelcomeThaiLang.text = [Localization languageSelectedStringForKey:@"Welcome to Thailand"];
 }
 @end

现在查看结果

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