发送文件时候报错

[leeshuangai]

为什么一方给另一方发送语音是成功的 ,另一方在给他发就失败,报错 Error Domain=XMPPOutgoingFileTransferErrorDomain Code=-1 "Unable to send SI offer; the recipient doesn't have the required features." UserInfo={NSLocalizedDescription=Unable to send SI offer; the recipient doesn't have the required features.}