cocos2d iphone - Game center didChangeState and didReceiveData fromRemotePlayer remote player is not calling in ios 8 & ios 9 -

i making realtime multiplayer game in cocos 2d-x ios. according flow doing following things of link ios game center gamekit programmatic invite matchmaking:

step 1: authenticate player

step 2: right after authentication set invitehandler.

step 3: list of friend playerids (not alias)

step 4: fourth, setup gkmatchrequest this... inviting friends.

step 5: fifth, use request call findmatchforrequest:withcompletionhandler.

step 6: sixth, sends request other player , if accept "invitehandler" second step gets called.

step 7: seventh, "invitehandler" second step gets match gkinvite!

step 8: eighth, "inviteeresponsehandler" fourth step gets called finished match!

till here code working fine after it. 3 steps after these steps not working can please me out ?

step 9: ninth, create didchangestate gkmatchdelegate handle finalization of match.

step 10: send message

step 11: eleventh, create didreceivedata gkmatchdelegate.

[_match senddata:data toplayers:_currentfriends datamode:gkmatchsenddataunreliable error:&error];  [_match senddata:data toplayers:_currentfriends withdatamode:gkmatchsenddatareliable error:&error];  [_match senddatatoallplayers:data withdatamode:gkmatchsenddataunreliable error:&error]; 

and delegate method is:

- (void)match:(gkmatch *)match didreceivedata:(nsdata *)data fromplayer:(nsstring *)playerid { nslog(@"received data"); [_delegate match:match didreceivedata:data fromplayer:playerid]; } 

i have tried:

- (void)match:(gkmatch *)match didreceivedata:(nsdata *)data fromremoteplayer:(gkplayer *)player {     nslog(@"received data"); } 

try this:this tutorial shows simple application game center

http://www.raywenderlich.com/60980/game-center-tutorial-how-to-make-a-simple-multiplayer-game-with-sprite-kit-part-1