Hi,
it's an iOS feature, that you can use for having the app download something
(or check state on your backend), before the alert is being made visible to
the end-user:
https://developer.xamarin.com/guides/ios/application_fundamentals/backgro...
Also (more interesting, I think) you can use it to send a slient message to
the device. E.g. when the app runs (fore/background) the callback is
invoked. You can use that to check state on your own backend (a 30 second
time window, you have for this), and if needed you could use that to, for
instance, issue something local e.g. local notifications (those are better
and more handy for several reasons e.g. better control of the badge icon):
https://developer.xamarin.com/guides/ios/application_fundamentals/backgro...
HTH,
Matthias
On Thu, Dec 3, 2015 at 7:01 PM, Rob Willett <rob.aerogear(a)robertwillett.com>
wrote:
Hi,
We now seem to have something approaching a stable and working UPS
configuration. (Famous last words!) Thanks to the Aerogear team for helping
resolve the background notifications on Android.
As we are tidying up, we noticed (ahem) that we had commented out a few
lines in our code.
if (event['content-available'])
{
// Still not clear what to do with this.
// push.setContentAvailable(1);
}
We went back to the Aerogear docs and tried to work out what
setContentAvailable really does and what should we do with it. The docs for
the function call are a little sparse, so we looked at the source code and
we’re still no wiser.
Is there a better explanation of when we should call setContentAvailable
and with which parameter?
Just to set the ball rolling we *think* it could mean that when you
receive the content-available = 1 flag on iOS, we do a call to get some
data from the server ourselves, if the the results of *our* server call
indicate that we have received new data, we set the value to
setContentAvailable to 1, if our function call to the server has no data,
then we set it to zero and if something failed we set it to 2.
So what happens if the value is 0, 1 or 2? if its 2, is a new new call
made to something, if its 0 or 1 what happens?
Apologies if we’ve missed the point of it, but we’re struggling to
understand this.
Thanks,
Rob.
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