如何从“返回字符串”；for loop"；？目标-C iOS

我是Objective-C语言编程新手

我需要在函数中为循环返回这个“tabName”。如何比较

app\u additional\u tab\u name\u

是否等于tabName？因为现在仍然返回任何

应用程序的姓氏\u附加\u选项卡\u名称\u

+ (NSString *)additionalTabName {
    for (int i = 0; i <= 16; i++) {
    tabNameConcatString = [NSMutableString stringWithFormat:@"app_additional_tab_name_%d", i];
    tabName = [LocalizedStringsUserDefaults valueForKey:tabNameConcatString];
        if ([LocalizedStringsUserDefaults existsObjectForKey:tabNameConcatString])  {
            tabName = [LocalizedStringsUserDefaults valueForKey:tabNameConcatString];
            NSLog(@"This tabName is: @% @% @% @%", tabName, @" and will append to: ", tabNameConcatString);
        }
    }
    return tabName;
}

+（NSString*）附加选项卡名称{
对于（int i=0；i在匹配条件内移动返回

+ (NSString *)additionalTabName {
    for (int i = 0; i <= 16; i++) {
    tabNameConcatString = [NSMutableString stringWithFormat:@"app_additional_tab_name_%d", i];
    tabName = [LocalizedStringsUserDefaults valueForKey:tabNameConcatString];
        if ([LocalizedStringsUserDefaults existsObjectForKey:tabNameConcatString])  {
            tabName = [LocalizedStringsUserDefaults valueForKey:tabNameConcatString];
            NSLog(@"This tabName is: @% @% @% @%", tabName, @" and will append to: ", tabNameConcatString);
            return tabName;
        }
    }
    return nil;
}

+（NSString*）附加选项卡名称{
对于（int i=0；我非常感谢你。