Avaudioplayer handset playback and external audio playback switch

- (Ibaction)Playpause:(UIButton *)Sender
{
 The following settings are set when initializing the player
 UInt32Sessioncategory=Kaudiosessioncategory_mediaplayback;
 Audiosessionsetproperty(Kaudiosessionproperty_audiocategory,
 sizeof(Sessioncategory),
 &Sessioncategory);
 
 UInt32Audiorouteoverride=Kaudiosessionoverrideaudioroute_speaker;
 Audiosessionsetproperty (Kaudiosessionproperty_overrideaudioroute,
 sizeof (Audiorouteoverride),
 &Audiorouteoverride);
 
 Avaudiosession *Audiosession= [AvaudiosessionSharedinstance];
 Speaker Playback By default
 [Audiosession setcategory:AvaudiosessioncategoryplaybackError:Nil];
 [Audiosession setActive:YES Error:Nil];
 
 Nserror *Playererror;
Myplayer= [[AvaudioplayerAlloc]Initwithcontentsofurl:[NsurlURLWithString:[VoicerecorderbasevcGetpathbyfilename:Recordedfile OfType:@"AAC"]]Error:&Playererror];
Myplayer.Meteringenabled=YES;
Myplayer.Delegate = Self;
 
 
 If (Myplayer== Nil)
 {
 NSLog(@"ERror creating player:%@", [Playererror description]);
 }
 
 [SelfHandlenotification:YES];
 [Myplayer Play];
}

- (void)Audioplayerdidfinishplaying:(Avaudioplayer *)Player successfully:(BOOL)Flag
{
 NSLog(@"Play End");
 [SelfHandlenotification:NO];
 [Myplayer Release];
}

#pragmaMark- Monitor handsetOrSpeaker
- (void)Handlenotification:(BOOL)State
{
 [[UideviceCurrentdevice]Setproximitymonitoringenabled:State]; It is recommended that you set yes before playing, the playback end setting no, this function is to turn on the infrared sensor
 
 If(State)Add Listener
 [[NsnotificationcenterDefaultcenter]Addobserver:Self
Selector:@selector(Sensorstatechange:)Name:@"Uideviceproximitystatedidchangenotification"
 Object:Nil];
 ElseRemove Listener
 [[NsnotificationcenterDefaultcenter]Removeobserver:SelfName:@"Uideviceproximitystatedidchangenotification" Object:Nil];
}

Handling Listener Trigger Events
-(void)Sensorstatechange:(Nsnotificationcenter *)Notification;
{
 If the phone is placed near the ear at this point, the sound will be output through the handset and darken the screen (save power)
 If ([[UideviceCurrentdevice]Proximitystate] ==YES)
 {
 NSLog(@"Device is close to user");
 [[AvaudiosessionSharedinstance]Setcategory:avaudiosessioncategoryplayandrecord Error: nil); 
  } 
  else 
  Span class= "pun" >{
  nslog (@ "Device is Not close to user "); 
  [[avaudiosession sharedinstance< Span class= "pun" >] Setcategory: Avaudiosessioncategoryplayback Error:nil   } 
 }         /span>                

Avaudioplayer handset playback and external audio playback switch