我使用以下行将NSDictionary转换为JSONNSData:NSData*jsonData=[NSJSONSerializationdataWithJSONObject:answersoptions:NSJSONWritingPrettyPrintederror:&err];并将其传递给服务器端，这是一个PHP脚本。该脚本将JSON字符串读取为:{"A":"1941","D":"1699","B":"1949","E":"1823","C":"1999"}如何将JSON字符串格式化为1行，如下所示？{"A":"1941","D":"1699","B":"1949","E":"18