我对iOS的XMPP框架有疑问。每次我触发registerWithPassword方法时，我都会得到一个错误:"ErrorDomain=XMPPStreamErrorDomainCode=1"Pleasewaituntilthestreamisconnected."UserInfo=0xad7c300{NSLocalizedDescription=Pleasewaituntilthestreamisconnected.}"我在代码中执行以下步骤:-(void)createUserWithUsername:(NSString*)nameandPW:(NSString*)pw{[selfs