在iPhonesdk中比较数据

使用条件语句，每次都到else语句中，if语句就没反应。

 if ([ [dict2 valueForKey:@"meeting_location"] isEqual:@""])
    {
        lbllocation.text = @"-----";
    }
    else
    {
        lbllocation.text = [NSString stringWithFormat:@"Location: %@",[dict2 valueForKey:@"meeting_location"]];

    }

web服务器的输出：

    "meeting_location" = "";
    "meeting_time" = "";
    "meeting_with" = "";

不是isEqual而是isEqualToString

if ([ [dict2 valueForKey:@"meeting_location"] isEqualToString:@""])