iphone - 无法以编程方式更改 MFMailComposer 语言？

Question

我正在尝试以编程方式更改 MFmailComposer 语言。最初，如果我选择“英语邮件”按钮首先，MFMailComposer 将以英语打开。现在，如果我选择“阿拉伯邮件”按钮，那么 MFMailComposer 将以英语而不是阿拉伯语打开。

这是我的 ViewController 的截图

那么，如何在不重启应用程序的情况下以编程方式更改 MFMailComposer 语言？

这是代码

- (IBAction)showInArabic:(id)sender 
{ 

   [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"ar", nil] forKey:@"AppleLanguages"];
   [[NSUserDefaults standardUserDefaults] synchronize];
   [self viewDidUnload];
   [self viewDidLoad];
   Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));
   if (mailClass != nil) 
   {
      if ([mailClass canSendMail]) 
      {
        [self displayComposerSheet];

      } else {

    [self launchMailAppOnDevice];
      }

    } else {

    [self launchMailAppOnDevice];
    }
}
- (IBAction)showInEnglish:(id)sender 
{
    [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"en", nil] forKey:@"AppleLanguages"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    NSArray *languages = [NSArray arrayWithObject:@"en"];
    [[NSUserDefaults standardUserDefaults] setObject:languages forKey:@"AppleLanguages"];

    [self viewDidUnload];
    [self viewDidLoad];

    Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));

    if (mailClass != nil) {

        if ([mailClass canSendMail]) {

            [self displayComposerSheet];

        } else {

            [self launchMailAppOnDevice];
        }

    } else {

        [self launchMailAppOnDevice];
    }
}

Answer 1

目前似乎无法以编程方式更改 MFMailComposer 语言。默认设置为英语。