How to mute audio in AVAudioPlayer?

Question

I have created AVAudioPlayer , Now I want to mute it when user click button.

Here what I have tried :

player.volume = 1.0  //when first time i initiate my player


- (IBAction)speakerOnOff:(id)sender {
    if (player.volume == 1.0) {

        [player setVolume: 0.0];

        NSLog(@"1volume is:%f",player.volume);
    }else if (player.volume == 0.0) {

        [player setVolume: 1.0];

        NSLog(@"2volume is:%f",player.volume);
    }
}

Answer 1

if (player.volume = 1.0) and if (player.volume = 0.0) are erroneous at least on two levels. First, C is not Pascal - the = operator is an assignment, probably you meant if (player.volume == 1.0) instead.

Two, even this wouldn't be any good - comparing floating-point numbers does not do what you think it does . You better set a Boolean flag to indicate the state of the player (and omit the else if part since it's redundant):

- (IBAction)speakerOnOff:(id)sender
{
    static BOOL muted = NO;
    if (muted) {
        [player setVolume:1.0];
    } else {
        [player setVolume:0.0];
    }
    muted = !muted;
}

Answer 2

swift 2+ solution

    let musicPlayer:AVAudioPlayer = AVAudioPlayer()
    var IsMuted:Bool = false

    if IsMuted == false {
      IsMuted = true
      musicPlayer.volume = 0
    } else {
      IsMuted = false
      musicPlayer.volume = 1
    }

-> Don't forget to setCategory to AVAudioSessionCategoryAmbient

do {
      try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryAmbient)
      try AVAudioSession.sharedInstance().setActive(true)
    } catch _ {
      return print("couldn't set session")
    }