I have been testing iOS14Beta 8 and I made about 400 incoming VoIP Pushes in the space of an hour or so. For those incoming calls I got two cases of "Killing VoIP app because it failed to post an incoming call in time" even though my code does that.
I have logged that Issue in a separate Forum item (
https://developer.apple.com/forums/thread/653756) as I think that is a bug in iOS14Beta's as I have never seen that issue with iOS13.x
Anyway after the second failure all other incoming VoIP Pushes were blocked with
"Application will not be launched because it failed to report an incoming call too many times (or repeatedly crashed.)"
This happened about 33 hours ago..
I tried restarting the iPhone (as Kevin DTS suggested) but it did not help. Pushes were still blocked. So maybe that behaviour has changed since Kevin's post.
Every few hours I make a test call to the App but the VoIP Push is still ignored.. Kevin also suggested that it should allow Pushes through after ~24 hours.
It would be great if we could get clarification from Apple about the following
1) What does "in time" mean? When we get a VoIP Push my understanding is that you must offer the call to Callkit before you return form pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(PKPushType)type withCompletionHandler:(void (^)(void))completion. However is there a time limit from when you start running this routine? We need to do some preprocessing on the pushed data before offering the call
2) When will iOS block all further incoming calls? For example is it if you fail to offer two calls within an hour. Or is it if you fail to offer 2 calls period? If you fail to offer a call and then 3 days later fail to offer a call will that Block all further calls. What is the algorithm?
3) When VoIP Pushes are blocked then what needs to happen to allow then through again? Is it simply a time period? if I keep sending calls in does that reset that? IE. Do you need no incoming Pushes for 24 hours to clear it?
4) Is there a new Issue in iOS14Betas Please see the separate thread about that
https://developer.apple.com/forums/thread/653756General CommentIt has been a lot of work and very difficult to change our code to
always offer calls before returning from "didReceiveIncomingPushWithPayload" routine. I can understand why Apple insist on that and will kill the App.
HOWEVER I suggest that blocking all further incoming calls is a very very severe step to take.
In complex call handing situations where you may not have a perfect connection back to your VoIP Server and there are time lags etc it is impossible to avoid the situation in extreme circumstances where a VoIP Push arrives but you are not in a position to offer the call.
Apple's Callkit framework is far superior to the competition but this step makes it extremely difficult to make a reliable VoIP App. A VoIP App is useless if calls are blocked..