How can I use this code to play more sounds? - ios

Question

//Action to play Audio//
-(IBAction)playAudio:(id)sender {
[self.loopPlayer play];
}
//Action to stop Audio//
-(IBAction)stopAudio:(id)sender {
if (self.loopPlayer.isPlaying) {
[self.loopPlayer stop];
self.loopPlayer.currentTime = 0;
self.loopPlayer.numberOfLoops = -1;
[self.loopPlayer prepareToPlay];
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//Code that gets audio file "trap synth"//
NSURL* audioFileURL = [[NSBundle mainBundle] URLForResource:#"trapsynth" withExtension:#"wav"];
self.loopPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:nil];
}
This is the code i'm using with one button to play the sound when the button is tapped and stop the sound when the button is released. How would I go about adding more sounds to more buttons? I want to have more buttons that play and stop different sounds just like this.
property (nonatomic, strong) AVAudioPlayer *loopPlayer;
This code is also in my ViewController.h file

Answer 1

Ok although the answer provided by Miro is on the write track the code example given has issues.
Should be this in viewDidLoad -
- (void)viewDidLoad {
[super viewDidLoad];
NSURL* audioFileURL1 = [[NSBundle mainBundle] URLForResource:#"trapsynth" withExtension:#"wav"];
self.loopPlayer1 = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL1 error:nil];
NSURL* audioFileURL2 = [[NSBundle mainBundle] URLForResource:#"other_audio_file" withExtension:#"wav"];
self.loopPlayer2 = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL2 error:nil];
}
also stopAudio: method should be this
-(IBAction)stopAudio:(id)sender {
if (self.loopPlayer1.isPlaying && (sender.tag == 1)) {
[self.loopPlayer1 stop];
self.loopPlayer1.currentTime = 0;
self.loopPlayer1.numberOfLoops = -1;
[self.loopPlayer1 prepareToPlay];
}
if (self.loopPlayer2.isPlaying && (sender.tag == 2)) {
[self.loopPlayer2 stop];
self.loopPlayer2.currentTime = 0;
self.loopPlayer2.numberOfLoops = -1;
[self.loopPlayer2 prepareToPlay];
}
}
And finally for playAudio:
-(IBAction)playAudio:(id)sender {
if([sender tag] == 1){
[self.loopPlayer1 play];
}
if([sender tag] == 2){
[self.loopPlayer2 play];
}
}

Answer 2

If you want to play different sounds at the same time you should look into creating separate AVAudioPlayers - if you create a different one for each sound, then you can easily control (play/stop) each of them separately with a specific button.

Answer 3

On the simplest level, you could do something like this, which allows you to use the same button handlers for all your audio. The playAudio checks the tag of the Play button you press (be sure to set the tag value in IB, to 1,2,etc). There really only need be one Stop button.
You could enhance this in many ways, like attempting to reuse the AVAudioPlayer somehow, and loading the audio on the fly instead of all at the beginning. Or storing your audio file info in an array, creating an array of AVAudioPlayers for management, etc. But this is a start.
-(IBAction)playAudio:(id)sender {
// first, stop any already playing audio
[self stopAudio:sender];
if([sender tag] == 1){
[self.loopPlayer1 play];
} else if([sender tag] == 2){
[self.loopPlayer2 play];
}
}
-(IBAction)stopAudio:(id)sender {
if (self.loopPlayer1.isPlaying) {
[self.loopPlayer1 stop];
self.loopPlayer1.currentTime = 0;
self.loopPlayer1.numberOfLoops = -1;
[self.loopPlayer1 prepareToPlay];
} else if (self.loopPlayer2.isPlaying) {
[self.loopPlayer2 stop];
self.loopPlayer2.currentTime = 0;
self.loopPlayer2.numberOfLoops = -1;
[self.loopPlayer2 prepareToPlay];
}
}
- (void)viewDidLoad {
[super viewDidLoad];
NSURL* audioFileURL1 = [[NSBundle mainBundle] URLForResource:#"trapsynth" withExtension:#"wav"];
self.loopPlayer1 = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:nil];
NSURL* audioFileURL2 = [[NSBundle mainBundle] URLForResource:#"trapsynth" withExtension:#"wav"];
self.loopPlayer2 = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:nil];
}
AND, in the .h file;
property (nonatomic, strong) AVAudioPlayer *loopPlayer1;
property (nonatomic, strong) AVAudioPlayer *loopPlayer2;