publish message with 15MB of image Base64String failed.

[wangqiwei66]

I'm trying to publish a message with a base64String of image ,string length about 15MB. I can log didPublishMessage .but immediately received: [TRACE] [didDisconect]: Optional(Error Domain=MGCDAsyncSocketErrorDomain Code=5 “Write operation timed out” UserInfo={NSLocalizedDescription=Write operation timed out})
Is there anyway to set the maxium payload limit in code ?

[JaylinYu]

Apparently a tcp timeout while writing big packet yo socket. The max packet size is set by Broker or in connect.