如何从“ for循环”返回字符串？ Objective-C iOS

问题描述

我是使用Objective-C语言编程的新手。

我需要从函数for loop中返回 this “ tabName”。如何比较app_additional_tab_name_与tabName相等？因为现在仍然返回任何app_additional_tab_name_的姓。

+ (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;
}

祝一切顺利。

解决方法

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;
}

如果未找到匹配项，则可以返回nil或返回空字符串。