Play/Pause with the same button [AVAudioPlayer]

Question

How can I play a sound with an IBAction by pressing on a UIbutton once and pause it by pressing the button again using AVAudioPlayer?

Answer 1

Keep your audioPlayer instance ready to play using the below method.

/*
 Prepares the audio file to play.
 */
-(void) initWithAudioPath:(NSString *) audioPath {
    // Converts the sound's file path to an NSURL object
    NSURL *audioPathURL = [[NSURL alloc] initFileURLWithPath:audioPath];

    self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioPathURL error:nil];
    audioPlayer.delegate = self;

    [audioPlayer prepareToPlay];

    [audioPathURL release];
}

-(void) pausePlaybackForPlayer:(AVAudioPlayer *) player {
    [player pause];
}

-(void) startPlaybackForPlayer:(AVAudioPlayer *) player {
    if (![player play]) {
        NSLog(@"Could not play %@\n", player.url);
    }
}

- (IBAction)Beat {
    if (audioPlayer.playing == NO) {
        // Audio player is not playing.
        // Set the button title here to "stop"...
        [self startPlaybackForPlayer:audioPlayer];
    }else {
        // Audio player is playing.
        // Set the button title here to "play"...
        [self pausePlaybackForPlayer:audioPlayer];
    }

}