gistfile1.m

    for (NSUInteger i = 0; i < [info.allKeys count]; i++)
    {
        NSString *field = info.allKeys[i];
        
        SEL setField = NSSelectorFromString([NSString stringWithFormat:@"set%@", field]);
        
        if ([newUser respondsToSelector:setField])
        {
            #pragma clang diagnostic push
            #pragma clang diagnostic ignored "-Warc-performSelector-leaks"
            [newUser performSelector:setField];
            #pragma clang diagnostic pop
        }
    }