xmpp好友状态4

// 实现好友状态的获取 - 在线、离线  别的状态自己去写一下判断和回掉就好

.h

/*!
 *  @Author Dylan.
 *
 *  Paresence
 */
typedef void (^userGoOnline) (NSString *);
typedef void (^userGoOffline) (NSString *);

- (void)refreshRosterPresence: (userGoOnline)online
                      offline: (userGoOffline)offline;

.m

#pragma mark presence
- (void)refreshRosterPresence: (userGoOnline)online
                      offline: (userGoOffline)offline {
    
    self.rosterOnline = online;
    self.rosterOffline = offline;
}

- (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence {
    
    // get presence type
    NSString * presenceType = [presence type];
    NSString * userID = [[sender myJID] user];
    
    NSString * presencrFromUser = [[presence from] user];
    if (![presencrFromUser isEqualToString:userID]) {
        if ([presenceType isEqualToString:@"available"]) {
            self.rosterOnline(presencrFromUser);
        } else if ([presenceType isEqualToString:@"unavailable"]) {
            self.rosterOffline(presencrFromUser);
        }
    }
}

补上Block回掉申明

/*!
 *  call back block
 */
@property (nonatomic, copy) userGoOnline rosterOnline;
@property (nonatomic, copy) userGoOffline rosterOffline;