EMChatManagerDefs.h

typedef NS_ENUM(NSInteger, MessageBodyType) { 
    eMessageBodyType_Text = 1, eMessageBodyType_Image, eMessageBodyType_Video, 
    eMessageBodyType_Location, eMessageBodyType_Voice, eMessageBodyType_File, 
    eMessageBodyType_Command 
};  

typedef NS_ENUM(NSInteger, MessageDeliveryState) { 
    eMessageDeliveryState_Pending = 0, eMessageDeliveryState_Delivering, 
    eMessageDeliveryState_Delivered, eMessageDeliveryState_Failure 
};  

typedef NS_ENUM(NSInteger, EMReceiptType){ 
    eReceiptTypeRequest = 0, eReceiptTypeResponse, 
};  

typedef NS_ENUM(NSInteger, EMMessageType){ 
    eMessageTypeChat, eMessageTypeGroupChat, eMessageTypeChatRoom 
};  

typedef NS_ENUM(NSInteger, EMBackupMessagesStatus) { 
    eBackupMessagesStatusNone = 0, eBackupMessagesStatusFormatting, 
    eBackupMessagesStatusCompressing, eBackupMessagesStatusUploading, 
    eBackupMessagesStatusUpdating, eBackupMessagesStatusCancelled, 
    eBackupMessagesStatusFailed, eBackupMessagesStatusSucceeded, 
};  

typedef NS_ENUM(NSInteger, EMRestoreBackupStatus) { 
    eRestoreBackupStatusNone = 0, eRestoreBackupStatusDownloading, 
    eRestoreBackupStatusDecompressing, eRestoreBackupStatusImporting, 
    eRestoreBackupStatusCancelled, eRestoreBackupStatusFailed, eRestoreBackupStatusSucceeded, 
};