在IM開發中,一個問題是怎麼管理傳輸,包括處理消息發送,消息接受和怎麼轉發等等,就是上一篇文章提到的IMService扮演的角色。另外一個問題就是傳輸的具體數據是怎麼定義的,既包括業務數據(文字,語音,圖片,地理位置等),也包括控制數據(音頻請求,加羣請求,離羣請求)。如今經過分析Message實體類來學習一下。服務器
下面一系列的常量定義了Message的typeide
#define MSG_HEARTBEAT 1 //心跳 #define MSG_AUTH 2 //認證 #define MSG_AUTH_STATUS 3 //認證狀態 #define MSG_IM 4 #define MSG_ACK 5 //ACK #define MSG_RST 6 #define MSG_GROUP_NOTIFICATION 7 //羣消息 #define MSG_GROUP_IM 8 //羣消息 #define MSG_PEER_ACK 9 //ACK #define MSG_INPUTING 10 //輸入 #define MSG_SUBSCRIBE_ONLINE_STATE 11 //在線狀態 #define MSG_ONLINE_STATE 12 //在線狀態 #define MSG_PING 13 // #define MSG_PONG 14 // #define MSG_AUTH_TOKEN 15 //TOKEN #define MSG_LOGIN_POINT 16 //多點登陸 #define MSG_RT 17 #define MSG_ENTER_ROOM 18 //進入聊天室 #define MSG_LEAVE_ROOM 19 //離開聊天室 #define MSG_ROOM_IM 20 //聊天室消息 #define MSG_SYSTEM 21 //系統消息 #define MSG_UNREAD_COUNT 22 //未讀消息數 #define MSG_CUSTOMER_SERVICE 23 //客服服務消息 #define MSG_CUSTOMER 24 //客服消息 #define MSG_CUSTOMER_SUPPORT 25 //客服支持 #define MSG_VOIP_CONTROL 64 //VOIP命令
下面幾個常量定義了平臺type學習
#define PLATFORM_IOS 1 #define PLATFORM_ANDROID 2 #define PLATFORM_WEB 3
IMMessage類由接受者ID,發送者ID,時間戳,消息本地存儲ID,消息內容構成,見下面代碼。atom
@interface IMMessage : NSObject @property(nonatomic, assign)int64_t sender; @property(nonatomic, assign)int64_t receiver; @property(nonatomic, assign)int32_t timestamp; @property(nonatomic, assign)int32_t msgLocalID; @property(nonatomic, copy)NSString *content; @end
CustomerMessage,客服消息類,和通用的IM消息格式差異在,customerID,sellerID,customerAppID,storeID這幾個屬性須要根據客服消息特定的使用場景來理解。orm
@interface CustomerMessage : NSObject //本地消息id 不會序列化傳到服務器 @property(nonatomic, assign)int32_t msgLocalID;本地存儲ID @property(nonatomic, assign)int64_t customerAppID;//APPid @property(nonatomic, assign)int64_t customerID;//客服用戶ID @property(nonatomic, assign)int64_t storeID;//商鋪ID @property(nonatomic, assign)int64_t sellerID;//客服ID @property(nonatomic, assign)int32_t timestamp; @property(nonatomic, copy)NSString *content; @end
RoomMessage 聊天室消息token
@interface RoomMessage : NSObject @property(nonatomic, assign)int64_t sender; @property(nonatomic, assign)int64_t receiver; @property(nonatomic, copy)NSString *content; @end
消息輸入狀態圖片
typedef RoomMessage RTMessage; @interface MessageInputing : NSObject @property(nonatomic, assign)int64_t sender; @property(nonatomic, assign)int64_t receiver; @end
受權結構體開發
@interface AuthenticationToken : NSObject @property(nonatomic, copy) NSString *token; @property(nonatomic, assign) int8_t platformID; @property(nonatomic, copy) NSString *deviceID; @end
多點登陸結構體get
@interface LoginPoint : NSObject @property(nonatomic, assign) int32_t upTimestamp; @property(nonatomic, assign) int8_t platformID; @property(nonatomic, copy) NSString *deviceID; @end
@interface VOIPControl : NSObject @property(nonatomic, assign) int64_t sender; @property(nonatomic, assign) int64_t receiver; @property(nonatomic) NSData *content; @end
@interface Message : NSObject @property(nonatomic, assign)int cmd; @property(nonatomic, assign)int seq; @property(nonatomic) NSObject *body; -(NSData*)pack; -(BOOL)unpack:(NSData*)data; @end
若是想要在現有的消息類型上支持新的消息類型,好比(實時定位,閱後即焚,(T)一下)。須要在Message基礎上作擴展。cmd
完整的代碼和DEMO能夠到[Gobelieve IM]查看。