Play music in the background using AVAudioplayer

I want to play music even if the app goes in background. I checked all stackoverflow links but none of them worked. Please help need to do it today.

I had used following code:-

  • How to use scaleTimeRange in an AVMutableComposition?
  • iOS - AVAudioPlayer doesn't continue to next song while in background
  • Add another button next to the “back” button on the left of a UINavigationBar
  • Check if file is already saved to disk?
  • dismissModalViewController Hides the parent view behind status bar
  • Can I edit an iPad's host file?
  • NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"Day At The Beach"  ofType: @"mp3"];
    
    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
    
    NSError *error;
    playerTemp = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:&error];
    playerTemp.numberOfLoops = 0;
    AudioSessionSetActive(true);
    [playerTemp play];
    

    12 Solutions Collect From Internet About “Play music in the background using AVAudioplayer”

    I had solved this question by referring iOS Application Background tasks

    and make some changes in .plist file of our application..

    Update

    write this code in your controller’s view did load method like this

    - (void)viewDidLoad
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"in-the-storm" ofType:@"mp3"]];
        AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
        [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
        [[AVAudioSession sharedInstance] setActive: YES error: nil];
        [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
        [audioPlayer play];
        [super viewDidLoad];
    }
    

    I just wanted to add a note to Mehul’s answer. This line:

    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    

    is actually very important. I used other tutorials to get my AVAudioPlayer up and running. Everything worked fine except my audio would not START if the app was in the background. To clarify, my audio was fine if it was already playing when the app went into the background…but it would not start if the app was already in the background.

    Adding the above line of code made it so my audio would start even if the app was in the background.

    You need to set ‘audio’ as one of your UIBackgroundModes in Info.plist. Apple has documentation on the issue.

    You can use MPMoviePlayerController even to play solo-audio movies. If you like it, read this detailed Apple Library Technical Q&A:

    iOS Developer Library Technical Q&A QA1668

    Step1

    Make the following changes in info.plist

    1. Application does not run in background : NO

    2. Required background modes

      item0 :App plays audio or streams audio/video using AirPlay

    Step 2
    Don’t forget to add the following things in MainViewController.h file

    1. #import <'AVFoundation/AVAudioPlayer.h>
    2. @interface MainViewController:<'AVAudioPlayerDelegate>

    3. AVAudioPlayer *H_audio_player;

    Step 3
    Add the following code inside the play action of your MainViewController class.

    NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%d-%d",C_CID, C_SID] ofType:@"mp3"];
    NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
    H_audio_player = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFileURL error:nil];
    H_audio_player.delegate = self;
    H_audio_player.numberOfLoops = -1;
    

    Write this line in to plist for background run…

    <key>UIBackgroundModes</key>
          <array>
                  <string>audio</string>
          </array>
    

    Write this code Where you want to use

    AVAudioPlayer*  audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:self.urlForConevW error:&error];
    audioPlayer.delegate = self;
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setActive: YES error: nil];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    audioPlayer.numberOfLoops =  1;       
    [audioPlayer play];
    

    Also important here if you are using MPMusicPlayerController:
    You must use:

    [MPMusicPlayerController iPodMusicPlayer] 
    

    And Not

    [MPMusicPlayerController applicationMusicPlayer] 
    

    Also if you don’t want your app to stop music which was playing when your app is started, look here:
    AVAudioPlayer turns off iPod – how to work around?

    I use the below code. It work for me, and call on the button click of audio player instance method.

    NSError *error; NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music" ofType:@"mp3"]]; 
    self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&error];
    [[AVAudioSession sharedInstance] setActive:YES error: &error]; 
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [self.player prepareToPlay];
    

    From all answers is missing this code to control the player when user is waking the device:

    - (BOOL)canBecomeFirstResponder {
            return YES;
        }
    
    - (void)remoteControlReceivedWithEvent:(UIEvent *)event {
        switch (event.subtype) {
    
            case UIEventSubtypeRemoteControlPlay:
    
                [_audioPlayer play];
                break;
    
            case UIEventSubtypeRemoteControlPause:
    
                [_audioPlayer pause];
                break;
    
            default:
                break;
        }
    }
    

    And you have all these options:

    UIEventSubtypeRemoteControlPlay                 = 100,
    UIEventSubtypeRemoteControlPause                = 101,
    UIEventSubtypeRemoteControlStop                 = 102,
    UIEventSubtypeRemoteControlTogglePlayPause      = 103,
    UIEventSubtypeRemoteControlNextTrack            = 104,
    UIEventSubtypeRemoteControlPreviousTrack        = 105,
    UIEventSubtypeRemoteControlBeginSeekingBackward = 106,
    UIEventSubtypeRemoteControlEndSeekingBackward   = 107,
    UIEventSubtypeRemoteControlBeginSeekingForward  = 108,
    UIEventSubtypeRemoteControlEndSeekingForward    = 109,
    

    If even after setting audio as one of your UIBackgroundModes in the plist the audio stops when going to background, try setting your application's audio session to media playback.

    Here’s the related reference:
    https://developer.apple.com/library/ios/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Introduction/Introduction.html

    Here’s about what the code’s gonna look like:

    NSError *activationError = nil;
    [[AVAudioSession sharedInstance] setActive: YES error: &activationError];
    
    NSError*setCategoryError = nil;
    [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: &setCategoryError];
    

    To play your audio in background

    Step 1 :Just add in your info.plistmake an array
    enter image description here

    step2 :

    - (void)applicationDidEnterBackground:(UIApplication *)application
    {
        __block UIBackgroundTaskIdentifier task = 0;
        task=[application beginBackgroundTaskWithExpirationHandler:^{
            NSLog(@"Expiration handler called %f",[application backgroundTimeRemaining]);
            [application endBackgroundTask:task];
            task=UIBackgroundTaskInvalid;
        }];
    }
    

    step3 :

    NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"iNamokar" ofType:@"mp3"];
        NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath];
    
        AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
    
        [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
        [[AVAudioSession sharedInstance] setActive: YES error: nil];
        [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [player prepareToPlay];
    [self.player play];
    

    From Apple’s sample code: Audio Mixer (MixerHost)

    // If using a nonmixable audio session category, as this app does, you must activate reception of 
    //    remote-control events to allow reactivation of the audio session when running in the background.
    //    Also, to receive remote-control events, the app must be eligible to become the first responder.
    - (void) viewDidAppear: (BOOL) animated {
    
        [super viewDidAppear: animated];
        [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
        [self becomeFirstResponder];
    }
    

    I think remote control events are not needed for the following case:

    AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers,
                            sizeof(value), &value);