toEMMessageStatus function

dynamic toEMMessageStatus (Status status)

消息状态 Status 类型数据转 int

Implementation 

toEMMessageStatus(Status status){
   if(status == Status.SUCCESS){
     return 0;
   } else if(status == Status.FAIL){
     return 1;
   } else if(status == Status.INPROGRESS){
     return 2;
   } else if(status == Status.CREATE){
     return 3;
   }
}