Music lock Screen Playback

1, first to music support background play

(1) Add in Info.plist

Required Background modes

Item 0:app plays audio or streams audio/video using AirPlay (2) Set Avaudiosession:

  Avaudiosession *session = [avaudiosession sharedinstance];    [Session Setactive:yes Error:nil];    [Session Setcategory:avaudiosessioncategoryplayback Error:nil];

(3) Registering events in the background:

  [[UIApplication sharedapplication] beginreceivingremotecontrolevents];

2. Lock screen Setting

Determine lock screen events for event handling

-(void) Remotecontrolreceivedwithevent: (Uievent *)Event{    Switch(Event. Subtype) {         Caseuieventsubtyperemotecontrolpause: [Self.currentaudioplayer pause];  Break;  CaseUieventsubtyperemotecontrolnexttrack:if(Self.rotatecell) {[Self.rotatecell stoprotate]; Nsindexpath*indexpath =[Self.tableview Indexpathforselectedrow]; Swtmusic*music =Self.musicarray[indexpath.item];                [Swtmusictool StopMusic:music.filename]; intindex = Indexpath.item +1; if(Index >=self.musicArray.count) {index=0; } Nsindexpath*newindexpath = [Nsindexpath indexpathforitem:index insection:0];                [Self.tableview Selectrowatindexpath:newindexpath Animated:yes scrollposition:uitableviewscrollpositiontop]; Swtmusiccell*cell =[Self.tableview Cellforrowatindexpath:newindexpath]; Self.rotatecell=cell;                [Cell startrotate]; Swtmusic*nextmusic =Self.musicarray[index];                [Self showinfoinlockedscreen:nextmusic]; Self.currentaudioplayer=[Swtmusictool PlayMusic:nextMusic.filename]; Self.currentaudioplayer.Delegate=Self ; }             Break;  CaseUieventsubtyperemotecontrolprevioustrack:if(Self.rotatecell) {[Self.rotatecell stoprotate]; Nsindexpath*indexpath =[Self.tableview Indexpathforselectedrow]; intindex = Indexpath.item-1; if(Index <0) {Index= self.musicarray.count-1; } Nsindexpath*newindexpath = [Nsindexpath indexpathforitem:index insection:0]; Swtmusic*music =Self.musicarray[indexpath.item];                                [Swtmusictool StopMusic:music.filename];                [Self.tableview Selectrowatindexpath:newindexpath Animated:yes scrollposition:uitableviewscrollpositiontop]; Swtmusiccell*cell =[Self.tableview Cellforrowatindexpath:newindexpath]; Self.rotatecell=cell;                [Cell startrotate]; Swtmusic*nextmusic =Self.musicarray[index];                [Self showinfoinlockedscreen:nextmusic]; Self.currentaudioplayer=[Swtmusictool PlayMusic:nextMusic.filename]; Self.currentaudioplayer.Delegate=Self ; }             Break;  CaseUieventsubtyperemotecontrolplay: [Self.currentaudioplayer play];  Break; default:             Break; }}

4. Lock screen Information

-(void) Showinfoinlockedscreen: (swtmusic*) music{//this way, the information cannot be displayed correctly on the lock screen//nsmutabledictionary *info = [nsmutabledictionary dictionary];//Info[mpmediaitempropertytitle] = music.name;//info[mpmediaitempropertyartist] = Music.singer;//info[mpmediaitempropertyartwork] = [[Mpmediaitemartwork alloc] Initwithimage:[uiimage imagenamed:music.icon]];< /c5>//    //[[Mpnowplayinginfocenter Defaultcenter] setnowplayinginfo:info];nsmutabledictionary*songinfo =[[Nsmutabledictionary alloc] init]; Mpmediaitemartwork*albumart =[ [Mpmediaitemartwork alloc] Initwithimage: [UIImage ImageNamed:music.icon]]; //set the playback progress bar    DoubleCurrentTime =Self.currentAudioPlayer.currentTime; DoubleDuration =self.currentAudioPlayer.duration;    [Songinfo SetObject:music.name Forkey:mpmediaitempropertytitle];    [Songinfo SetObject:music.singer forkey:mpmediaitempropertyartist];    [Songinfo SetObject:music.singer Forkey:mpmediaitempropertyalbumtitle]; [Songinfo Setobject:albumart forkey:mpmediaitempropertyartwork];    [Songinfo setobject:@ (CurrentTime) forkey:mpnowplayinginfopropertyelapsedplaybacktime];    [Songinfo setobject:@ (Duration) forkey:mpmediaitempropertyplaybackduration]; [[Mpnowplayinginfocenter Defaultcenter] setnowplayinginfo:songinfo];}

Music lock Screen Playback