ios - iPhone : Using localization change language of an app set it in NSUserDefaults

Question

嗨， friend 们，我是 iPhone 的新手。在我的项目中，我使用本地化来更改应用程序的语言。我做到了，但问题。当应用程序停止并再次运行时，不会保留通过本地化设置的语言。所以我读到我们需要在 NSUserDefaults 中保存由本地化设置的语言。请帮我。如何在应用程序启动时将其保存在 NSUserDefaults 和回调中？这是代码。这样我设置了语言

- (IBAction)EngLang:(id)sender {
    [[Localization sharedInstance] setPreferred:@"en" fallback:@"es"];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:@"en" forKey:@"Applanguage"];   
}

- (IBAction)espLang:(id)sender {
    [[Localization sharedInstance] setPreferred:@"es" fallback:@"en"];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:@"es" forKey:@"Applanguage"];
}

如何在 NSUserDefaults 中保存语言以及如何在应用启动时调用它？现在我将语言保存在 NSUserDefaults 中。如何阅读？这是我以前阅读的代码。我在 appDelegate 中完成了此操作。

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

Answer 1

试试这个。

// Set languge en
- (IBAction)EngLang:(id)sender {
    [[Localization sharedInstance] setPreferred:@"en" fallback:@"es"];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:@"en" forKey:@"Applanguage"];
    [defaults synchronize];
}

// Set languge es
- (IBAction)espLang:(id)sender {
    [[Localization sharedInstance] setPreferred:@"es" fallback:@"en"];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:@"es" forKey:@"Applanguage"];
    [defaults synchronize];
}

// Call this method on launching.
- (void) retainTheLastSettedLanguage
{
    NSString * currentLanguage ;

    if ([[NSUserDefaults standardUserDefaults] valueForKey:@"Applanguage"] != nil)
     {
        currentLanguage = [[NSUserDefaults standardUserDefaults] valueForKey:@"Applanguage"];
        if ([currentLanguage isEqualToString:@"en"]) 
        {
           [[Localization sharedInstance] setPreferred:@"en" fallback:@"es"];   
        }
        else
        {
           [[Localization sharedInstance] setPreferred:@"es" fallback:@"en"];    
        }
     }    
}