setTimeout with BackgroundService

I do not understand why the timer runs in the background for 9 minutes but when I rule the timer to 15 minutes it no longer works even in the background?

app.js

var service;
 
Ti.App.addEventListener('pause',function(e){
 
 
        service = Ti.App.iOS.registerBackgroundService({url:'bg.js'}); 
});

bg.js

var Min = 15;
var MiliSec = (Min*60)*1000);
 
setTimeout(function(){
 
 var xhr_power = Ti.Network.createHTTPClient();
     xhr_power.open("GET","http://www.monsite.fr");
 
        xhr_power.onload = function()
        {
            try
            {
                Ti.API.info('ok');
            }
            catch(E)
            {
                Ti.API.info('Error : '+E);
            }
        };
        // Get the data
     xhr_power.send();
 
}, MiliSec;

The app on iOs gets killed after 10 minutes when put in the background unless you set the background mode, but in this case restrictions apply. http://developer.apple.com/library/ios/#documentation/general/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html

scroll to UIBackgroundModes

?I have a solution that works but it is not the best, I created an audio object then I start reading the application is in the background, I created an empty sound is read loop which allows to have my code that works in the background :

var player = Ti.Media.createSound({url:"sons.mp3", looping:true, allowBackground:true});
 
Ti.Media.defaultAudioSessionMode = Ti.Media.AUDIO_SESSION_MODE_PLAYBACK;

Because, so far as I know, an app cannot stay more than 10 minutes in background before iOS somehow terminates it.

I tried with

<key>UIBackgroundModes</key>
<array>
    <string>newsstand-content</string>
</array>

but I still have the same problem you advise me what to UIBackgroundModes Value ? Thank you for answer

I am try your methode but don't work. Thank

I think that's an option, but Apple wouldn't accept that I think, too... Or do you have a productive application in the AppStore which runs with this solution in the background?

yes I have an application that is Freebox Sleep, used for this application, you need to be in France and have freebox if the app does not function iTunes App => Freebox Sleep

Okay, fresh! :) But i mean, your application must something do with audio in the background. Otherwise apple will reject it, you app use the audio-function for background and apple allow that it this case. But as example for an tracking-app (should use "location" BackgroundMode) I can't put "audio" in the tiapp.xml for background-use.

I then had the chance because my application has passed the validation :)

Lucky guy. :) One question: How did you create the "empty" mp3-file?

I created a silent mp3 file with garage band, if you want I send you by mail