iOS发送消息没有回调didSendMessage

用asyncSendMessage发送消息能够成功发送（断网情况下只加入数据库，没有发送），但是无论是didSendMessage还是didReceiveMessageId都不会回调，但在同一个viewcontroller下面的didReceiveMessage在收到消息时会触发回调，产生的log如下：
2015-12-24 20:02:20:313 EduTeacher[82423:70b] begin insert message to chatter::st151267512, messageId::151d3de4e0e
2015-12-24 20:02:20:390 EduTeacher[82423:70b] end insert message with account::tcgehong2, to chatter::st151267512, messageId::151d3de4e0e, result::YES
2015-12-24 20:02:20:391 EduTeacher[82423:3a03] SEND: {"to":"st151267512","bodies":[{"type":"txt","msg":"Test message"}],"from":"tcgehong2"}
2015-12-24 20:02:20:423 EduTeacher[82423:9717] RECV: 151d3de4e0e151d3de4e0e
2015-12-24 20:02:20:425 EduTeacher[82423:3a03] SEND: