1 #PRagma mark - rosterHandle 2  3 // initRoster 4 - (void)initRoster { 5     self.xmppRosterMemory = [[XMPPRosterMemoryStorage alloc] init]; 6     self.xmppRoster = [[XMPPRoster alloc] initWithRosterStorage:self.xmppRosterMemory]; 7     [_xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()]; 8     [_xmppRoster activate:self.xmppStream]; 9 }10 11 - (void)addFriend: (NSString *)accountName {12     [_xmppRoster addUser:[XMPPJID jidWithString:[accountName stringByAppendingString:DOMAINS]] withNickname:nil];13 }14 15 - (void)removeFriend: (NSString *)accountName {16     [_xmppRoster removeUser:[XMPPJID jidWithString:[accountName stringByAppendingString:DOMAINS]]];17 }18 19 // call back20 - (void)dealWithFriendAsk: (BOOL)isAgree21               accountName: (NSString *)accountName {22     XMPPJID * jid=[XMPPJID jidWithString:[NSString stringWithFormat:@"%@%@",accountName,DOMAINS]];23     if(isAgree){24         [self.xmppRoster acceptPresenceSubscriptionRequestFrom:jid andAddToRoster:NO];25     }else{26         [self.xmppRoster rejectPresenceSubscriptionRequestFrom:jid];27     }28 29 }30 31 #pragma mark addFriendDelegateMethods32 - (void)xmppRoster:(XMPPRoster *)sender didReceivePresenceSubscriptionRequest:(XMPPPresence *)presence {33     34     NSString *presenceFromUser =[NSString stringWithFormat:@"%@", [[presence from] user]];35     if (self.acceptOrDenyFriend != nil) {36         BOOL isAgree = self.acceptOrDenyFriend(presenceFromUser);37         [self dealWithFriendAsk:isAgree accountName:presenceFromUser];38     }39 }40 41 @end

 1 /*! 2  *  @Author Dylan. 3  * 4  *  addRoster. 5  */ 6 // if you want to deny or add friend. please call this block 7 @property (nonatomic, copy) BOOL (^acceptOrDenyFriend) (NSString *); 8 @property (nonatomic, strong) XMPPRoster * xmppRoster; 9 10 /*!11  *  @Author Dylan. Methods12  */13 - (void)addFriend: (NSString *)accountName;14 - (void)removeFriend: (NSString *)accountName;