Sound.Play/Stop Not working

Targets iOS
1

If I drag an mp3 into my project and .playlooping the music in the App.Opening event and then try and .stop the music anywhere in the App I don’t get a result. Are there some exceptions to what you can play? R2.1

2

As far as I know the built in Sound class is broken. You can use the AVAudioPlayer class in iOSKit. Example here: https://github.com/kingj5/iOSKit/blob/master/ExampleViews/AVFoundationViews/RecordPlayAudioView.xojo_code

3

Thanks Jason, is ios kit suppose to work in Xojo 2020R2.1?

4

Some commits were pushed today that should eliminate the compiler errors. Please pull the latest version for 2020r2.1 support

5

What would be the minimum that I have to drag in the project or doesn’t it matter? What I mean is if you don’t use it, it doesn’t compile.

6

Just copy the entire modules folder. Anything you don’t use will be removed by the linker when compiling your app

1 Like
7

How do you use this to play an .mp3 that is dragged into your project

if not recorder.recording then
  dim err as Foundation.NSError
  player = new AVFoundation.AVAudioPlayer(recorder.url,err)
  call player.Play
end if
8

This is untested but should get you most of the way there. I thought it was fairly clear from the example but let me know if something still doesn’t make sense

Dim f as folderitem //file to play
//player is an AVFoundation.AVAudioPlayer instance on your view
Dim url as new Foundation.NSURL(f)

dim err as Foundation.NSError

player = new AVFoundation.AVAudioPlayer(url,err)
call player.Play
9

When I try this, it doesn’t play giving an error operation can’t be completed

Dim f as folderitem //file to play
//player is an AVFoundation.AVAudioPlayer instance on your view
f = SpecialFolder.Resource("QMSoundtrack2.mp3")
Dim url as new Foundation.NSURL(f.URLPath,false)

dim err as Foundation.NSError

player = new AVFoundation.AVAudioPlayer(url,err)
call player.Play
10

Please try adding the following before that code:

dim session as AVFoundation.AVAudioSession = AVFoundation.AVAudioSession.SharedInstance
dim err as Foundation.NSError
call session.SetCategory(AVFoundation.AVStringConstant("AVAudioSessionCategoryPlayback"),err)
if not session.SetActive(True,err) then
    MsgBox "failed to make session active"
end if
11

Err is nil now but doesn’t play anything. The file is ok if I just use Xojo .play but that is back to the initial problem of you can’t stop it

12

Add an iOSSound property in App class or a module. Let’s name it theSound

Play like this:

if theSound is nil then
    theSound = new iossound(SpecialFolder.GetResource("name of file.mp3"))
End if
theSound.Play

Stop like this:

theSound.Stop
1 Like
13

Please try passing only the folderitem, like in my example. The URL Path might not be what we want.

Also please try changing the AVAudioPlayer constructor to

player = new AVFoundation.AVAudioPlayer(url, “mp3”, err)

This should work per stackoverflow, the second suggestion I translated from there

1 Like
14

So for those of you that are using iOSSound or MobileSound, may I suggest that you subclass it and add a Destructor:

Sub Destructor()
    Self.Stop
End Sub

This should stop the memory leak that’s been reported.

15

In terms of the original question, the problem you are running into is that a sound dragged into a project is a method at runtime which returns an instance of the object it wraps… and a new instance is created every time it is called.

The way around this is to make a property somewhere, lets say

App.MySound as Sound

In the App.Opening event:

MySound = Name_of_your_sound
MySound.Play

And later:

App.MySound.Stop
2 Likes
16

Thanks Greg :beers: