iPhone中的本地化不适用于按钮单击

我为iPhone制作了一个应用程序。在此情况下，用户可以通过单击按钮更改语言。但NSLoalizedString并没有转换该值

代码是

-(IBAction)btn1pressed:(id)sender {
    SecViewController *sec = [[SecViewController alloc] initWithNibName:@"SecViewController" bundle:nil];
    NSUserDefaults* userDefaults = [NSUserDefaults standardUserDefaults];

    // NSLog(@"%@", [userDefaults objectForKey:@"AppleLanguages"]);


    languages =@"en";


    [[NSUserDefaults standardUserDefaults] setObject:languages forKey:@"AppleLanguages"];
    [[NSUserDefaults standardUserDefaults] synchronize];     
    NSLog(@"%@", [userDefaults objectForKey:@"AppleLanguages"]);

    // NSLog(@"%@", NSLocalizedString(@"Subhash", nil));
    [self.navigationController pushViewController:sec animated:YES];
}

-(IBAction)btn2pressed:(id)sender {
    SecViewController *sec = [[SecViewController alloc] initWithNibName:@"SecViewController" bundle:nil];
    NSUserDefaults* userDefaults = [NSUserDefaults standardUserDefaults];

    // NSLog(@"%@", [userDefaults objectForKey:@"AppleLanguages"]);


    languages = @"es";


    [[NSUserDefaults standardUserDefaults] setObject:languages forKey:@"AppleLanguages"];
    [[NSUserDefaults standardUserDefaults] synchronize];     
    NSLog(@"%@", [userDefaults objectForKey:@"AppleLanguages"]);

    //  NSLog(@"%@", NSLocalizedString(@"Subhash", nil));

    [self.navigationController pushViewController:sec animated:YES];
}

-(IBAction)btn3pressed:(id)sender {
    SecViewController *sec = [[SecViewController alloc] initWithNibName:@"SecViewController" bundle:nil];
    NSUserDefaults* userDefaults = [NSUserDefaults standardUserDefaults];

    // NSLog(@"%@", [userDefaults objectForKey:@"AppleLanguages"]);


    languages =@"ja";


    [[NSUserDefaults standardUserDefaults] setObject:languages forKey:@"AppleLanguages"];
    [[NSUserDefaults standardUserDefaults] synchronize];     
    NSLog(@"%@", [userDefaults objectForKey:@"AppleLanguages"]);

    // NSLog(@"%@", NSLocalizedString(@"Subhash", nil));

    [self.navigationController pushViewController:sec animated:YES];
}

试一试

使用NSLocalizedString（）进行本地化

同时给出相应的本地化字符串

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