objective c - iOS MediaPlayer Remote control events not working -

i'am trying add remote control events music player app, can't working.

some facts:

• i'm using [mpmusicplayercontroller applicationmusicplayer];
• i added audio, airplay , picture in picture background modes;
• the example playing audio;
• it not receive remote notifications lock screen , control center;

i've made example project can downloaded here: example project main source:

#import "viewcontroller.h" #import <mediaplayer/mpmediapickercontroller.h> #import <mediaplayer/mpmediaquery.h> #import <mediaplayer/mediaplayer.h>  @interface viewcontroller ()  @property (strong, nonatomic) mpmusicplayercontroller *musicplayer; @property (strong, nonatomic) mpmediaitemcollection *musicplayersongs;  @end  @implementation viewcontroller  - (void)viewdidload {     [super viewdidload];      _musicplayersongs = [mpmediaitemcollection alloc];     _musicplayer = [mpmusicplayercontroller applicationmusicplayer];     [_musicplayer setshufflemode: mpmusicshufflemodeoff];     [_musicplayer setrepeatmode: mpmusicrepeatmodenone];     [_musicplayer begingeneratingplaybacknotifications]; }  -(void)viewdidappear:(bool)animated{      [super viewdidappear:animated];      nsmutablearray *selectedtracks = [nsmutablearray new];      //find tracks contains 'a'     mpmediapropertypredicate *songpredicate =     [mpmediapropertypredicate predicatewithvalue:@"a"                                      forproperty:mpmediaitempropertytitle                                   comparisontype:mpmediapredicatecomparisoncontains];      mpmediaquery *mediaquery = [[mpmediaquery alloc] init];     [mediaquery addfilterpredicate:songpredicate];     [selectedtracks addobjectsfromarray:[mediaquery items]];      nslog(@"number of tracks containing 'a': %lu",(unsigned long)selectedtracks.count);      self.musicplayersongs = [[mpmediaitemcollection alloc]initwithitems:selectedtracks];      [self.musicplayer setqueuewithitemcollection:self.musicplayersongs];     [self.musicplayer play];     [self.musicplayer begingeneratingplaybacknotifications];      [self basicsetup];     [self updatenowplayingcenter]; }  - (void)basicsetup {      //listen remote control events     [mpremotecommandcenter sharedcommandcenter].previoustrackcommand.enabled = no;     [mpremotecommandcenter sharedcommandcenter].nexttrackcommand.enabled = no;     [mpremotecommandcenter sharedcommandcenter].playcommand.enabled = yes;     [mpremotecommandcenter sharedcommandcenter].pausecommand.enabled = yes;     [mpremotecommandcenter sharedcommandcenter].toggleplaypausecommand.enabled = yes;     [[mpremotecommandcenter sharedcommandcenter].nexttrackcommand addtarget:self action:@selector(remotenext)];     [[mpremotecommandcenter sharedcommandcenter].previoustrackcommand addtarget:self action:@selector(remoteprevious)];     [[mpremotecommandcenter sharedcommandcenter].playcommand addtarget:self action:@selector(remoteplay)];     [[mpremotecommandcenter sharedcommandcenter].pausecommand addtarget:self action:@selector(remoteplay)];     [[mpremotecommandcenter sharedcommandcenter].toggleplaypausecommand addtarget:self action:@selector(remotetoggleplaystate)];      [[uiapplication sharedapplication] beginreceivingremotecontrolevents];  }  -(void)remoteplay{     nslog(@"remoteplay");     [self.musicplayer play]; }  -(void)remotenext{     nslog(@"remotenext");     [self.musicplayer skiptonextitem];     [self updatenowplayingcenter]; }  -(void)remoteprevious{     nslog(@"remoteprevious");     [self.musicplayer skiptopreviousitem];     [self updatenowplayingcenter]; }  -(void)remotepause{     nslog(@"remotepause");     [self.musicplayer pause]; }  -(void)remotetoggleplaystate{     nslog(@"remotetoggleplaystate");     if([self.musicplayer playbackstate] == mpmusicplaybackstateplaying){         [self.musicplayer pause];     }else{         [self.musicplayer play];     } }  -(void)updatenowplayingcenter{      mpnowplayinginfocenter *center = [mpnowplayinginfocenter defaultcenter];     nsmutabledictionary *songinfo = [nsmutabledictionary dictionarywithdictionary:@{                                                                                     mpmediaitempropertyartist: [self.musicplayer nowplayingitem].artist,                                                                                     mpmediaitempropertytitle: [self.musicplayer nowplayingitem].title,                                                                                     mpmediaitempropertyalbumtitle: [self.musicplayer nowplayingitem].albumtitle,                                                                                     }];     center.nowplayinginfo = songinfo; } 

i can't figure out why not working :(

progress update's found out far, if reboot iphone, works. every time after won't.

the lock screen , control center both show right track, still can't control app.

not sure if helps @ all, here how received changes (in swift).

override func viewdidload() {     super.viewdidload()      nsnotificationcenter.defaultcenter().addobserver(self, selector: #selector(self.getnowplayingitem), name: mpmusicplayercontrollernowplayingitemdidchangenotification, object: nil)     player.begingeneratingplaybacknotifications() }  deinit {     player.endgeneratingplaybacknotifications()     nsnotificationcenter.defaultcenter().removeobserver(self) } 

it necessary (addobserver , begingeneratingplaybacknotifications), (removeobserver , endgeneratingplaybacknotification). not yet familiar remote control events, may want try ending notifications well. hope helps!