iOS实现锁屏页面控制音乐播放

本文实例为大家分享了ios锁屏页面控制音乐播放的具体代码，供大家参考，具体内容如下

//1、调整音频会话设置，确保应用进入后台或静音开关已开启时音频仍将继续播放 
//2、锁屏状态下显示媒体信息 
//3、锁屏上的空间可以控制音频播放

#import "viewcontroller.h"
#import <avfoundation/avfoundation.h>
#import <mediaplayer/mediaplayer.h>

@interface viewcontroller ()

@property (nonatomic, strong) avaudioplayer *audioplayer;
@property (weak, nonatomic) uibutton *playbutton;

@end

@implementation viewcontroller

- (void)viewdidload {
 [super viewdidload];

 uibutton * playbutton = [uibutton buttonwithtype:uibuttontypesystem];
 playbutton.frame = cgrectmake(0, 0, 200, 40);
 playbutton.center = self.view.center;
 [playbutton settitle:@"在后台播放音频" forstate:uicontrolstatenormal];
 [playbutton addtarget:self action:@selector(playmusicinbackground:) forcontrolevents:uicontroleventtouchupinside];
 [self.view addsubview:playbutton];

 nserror *playeriniterror = nil;

 nsstring *audiopath =
 [[nsbundle mainbundle] pathforresource:@"background_audio"
         oftype:@"mp3"];

 nsurl *audiourl = [nsurl fileurlwithpath:audiopath];

 self.audioplayer = [[avaudioplayer alloc]
      initwithcontentsofurl:audiourl
      error:&playeriniterror];

 avaudiosession *session = [avaudiosession sharedinstance];

 nserror *activeerror = nil;
 if (![session setactive:yes error:&activeerror]) {
  nslog(@"failed to set active audio session!");
 }

 //no.1
 //开始写代码，调整音频会话设置，确保即便应用进入后台或静音开关已开启，音频仍将继续播放

 nserror *categoryerror = nil;
 [session setcategory:avaudiosessioncategoryplayback error:&categoryerror];


 //end_code


}
- (void)playmusicinbackground:(id)sender {

 if ([self.audioplayer isplaying]) {
  [self.audioplayer stop];

  [self.playbutton settitle:@"正在播放音乐"
       forstate:uicontrolstatenormal];

 } else {
  uiimage *lockimage = [uiimage imagenamed:@"belongtome.jpg"];

  mpmediaitemartwork *artwork =
  [[mpmediaitemartwork alloc] initwithimage:lockimage];

  nsdictionary *mediadict =
  @{
   mpmediaitempropertytitle: @"backgroundtask audio",
   mpmediaitempropertymediatype: @(mpmediatypeanyaudio),
   mpmediaitempropertyplaybackduration:
    @(self.audioplayer.duration),
   mpnowplayinginfopropertyplaybackrate: @1.0,
   mpnowplayinginfopropertyelapsedplaybacktime:
    @(self.audioplayer.currenttime),
   mpmediaitempropertyalbumartist: @"some user",
   mpmediaitempropertyartist: @"some user",
   mpmediaitempropertyartwork: artwork };

  [self.audioplayer play];

  [self.playbutton settitle:@"停止播放后台音乐"
       forstate:uicontrolstatenormal];

  //no.2
  //开始写代码，将媒体信息显示在锁定屏幕上，并使锁屏上控件可以控制音频播放


  [[uiapplication sharedapplication] beginreceivingremotecontrolevents];


  //end_code
 }
}

//no.3
//开始写代码，响应远程控制，使得进入锁屏状态后可以控制音乐“播放”和“暂停”


- (void) remotecontrolreceivedwithevent: (uievent *) receivedevent {

 if (receivedevent.type == uieventtyperemotecontrol) {
  switch (receivedevent.subtype) {

   case uieventsubtyperemotecontrolplay:
    [self.audioplayer play];
    break;

   case uieventsubtyperemotecontrolpause:
    [self.audioplayer pause];
    break;

   default:
    nslog(@"没有处理过这个事件------receivedevent.subtype==%ld",(long)receivedevent.subtype);
    break;
  }
 }
}


//end_code

- (void)didreceivememorywarning {
 [super didreceivememorywarning];
}

@end

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。