xmpp協議之type狀態碼表示屬性

簡單扼要，主要簡單介紹到xmpp中的presence

  表示XMPP狀態的packet。每一個presence都有一個狀態。用枚舉類型Presence.Type的值表示:

available --(默認)用戶空閑狀態

unavailable--用戶沒空看消息

subscribe--請求加別人為好友

subscribed--確認別人對自己的好友請求

unsubscribe--請求刪除好友

unsubscribed--拒絕對方的添加請求

error --當前狀態packet有錯誤

內嵌兩個Presence.Mode 和Presence.Type。可以使用setStatus自定義當前的狀態

小例子：

加好友

//添加好友
#pragma mark 加好友
- (void)XMPPAddFriendSubscribe:(NSString *)name
{
    //XMPPHOST 就是服務器名，  主機名
    NSXMLElement *mes = [NSXMLElement elementWithName:@"presence"];
            
            
    [mes addAttributeWithName:@"xmlns" stringValue:@"jabber:client"];
    //消息類型
    [mes addAttributeWithName:@"type" stringValue:@"subscribe"];
    [mes addAttributeWithName:@"to" stringValue:name];
    [mes addAttributeWithName:@"from" stringValue:[NSString stringWithFormat:@"%@@%@",[[ShpadDataCenter AppData] loginname],@"ay130415223308469c09"]];
            
    //發送消息
    [[[ShpadXMPPService sharedInstance] xmppStream] sendElement:mes];
            
}

//定義刪除好友XMPP
#pragma mark 加好友
- (void)XMPPDeleteFriendSubscribe:(NSUInteger)row
{
   //XMPPHOST 就是服務器名，  主機名
   NSXMLElement *mes = [NSXMLElement elementWithName:@"presence"];


   [mes addAttributeWithName:@"xmlns" stringValue:@"jabber:client"];
   //消息類型
   [mes addAttributeWithName:@"type" stringValue:@"unsubscribe"];
   [mes addAttributeWithName:@"to" stringValue:[(BuddyEntity *)[self._allFriends objectAtIndex:row] userId]];
   [mes addAttributeWithName:@"from" stringValue:[NSString stringWithFormat:@"%@@%@",[[ShpadDataCenter AppData] loginname],@"ay130415223308469c09"]];

   //發送消息
   [[[ShpadXMPPService sharedInstance] xmppStream] sendElement:mes];


}

//定義刪除好友XMPP
#pragma mark 刪除好友
- (void)XMPPDeleteFriendSubscribe:(NSUInteger)row
{
    //XMPPHOST 就是服務器名，  主機名
    NSXMLElement *mes = [NSXMLElement elementWithName:@"presence"];
        
        
    [mes addAttributeWithName:@"xmlns" stringValue:@"jabber:client"];
    //消息類型
    [mes addAttributeWithName:@"type" stringValue:@"unsubscribe"];
    [mes addAttributeWithName:@"to" stringValue:[(BuddyEntity *)[self._allFriends objectAtIndex:row] userId]];
    [mes addAttributeWithName:@"from" stringValue:[NSString stringWithFormat:@"%@@%@",[[ShpadDataCenter AppData] loginname],@"ay130415223308469c09"]];
        
    //發送消息
    [[[ShpadXMPPService sharedInstance] xmppStream] sendElement:mes];
        
}

//拒絕好友請求xmpp
#pragma mark 拒絕好友
- (void)XMPPRejectFriendSubscribe:(id) sender
{
    //XMPPHOST 就是服務器名，  主機名
    NSXMLElement *mes = [NSXMLElement elementWithName:@"presence"];
      
      
    [mes addAttributeWithName:@"xmlns" stringValue:@"jabber:client"];
    //消息類型
    [mes addAttributeWithName:@"type" stringValue:@"unsubscribed"];
    [mes addAttributeWithName:@"to" stringValue:[self.userInfo objectForKey:@"userName"]];
    [mes addAttributeWithName:@"from" stringValue:[NSString stringWithFormat:@"%@@%@",[[ShpadDataCenter AppData] loginname],@"ay130415223308469c09"]];
      
    //發送消息
    [[[ShpadXMPPService sharedInstance] xmppStream] sendElement:mes];
      
}