ios7: how to track system internals like notifications

Question

We are developing application which rely on new IOS7 functionality - remote-notification background updates.

According to docs system can "skip" calls to didReceiveRemoteNotification:fetchCompletionHandler: if it finds that background processing power-consuming and lengthy, etc and we see this in practice - user can get push notification on the screen, but calls to didReceiveRemoteNotification:fetchCompletionHandler: are simply not happening at all

The question is - how we can check what happeping in ios with push? is there some ways to see internal system logs with real information from ios services? We need this for debug purposes of course, not in released application. just to double-check and fine tune our background processing. There is should be the way for developer to see what is really happening on device.

I found application "appswitcher" that shows similar stuff, but on ios7 it shows only active application logs (appswitcher itself), not system-wide. so it is useless for us...

To be clear: push notifications are working correctly, they are always received by the program in Debug mode for example. But in release/adhoc build we see that some notifications are sent to applications (waking it from background) and some are not. Documentation stating that fetch callback is used to calculate cpu/data usage and ios reserve right to "skip" notifications when it feels to do so, we just want to find the way to see is this is the case

Any help is welcome

Answer 1

I've never tried it but I saw this a while back. By looking at it, it seems like it will help your case but unfortunately, you gotta give it a try to find out if its worth it or not.

https://developer.apple.com/downloads/index.action Go to that website, and login using your developer account. Go to page 2 (or find Oct 4, 2013 post Bug Reporter Logging Profiles (iOS)). In the description, Apple has a link that tells you how to use these profiles. As the title of that post suggest that it is used for bug reporting, hopefully it gives you some details so you could fix your bugs.

Try it and see if it works and let other people know if it's useful or not. Since it says 'Logging', my guess is that it will output detail info on the console about push messages and not secretly log and sends the log to apple.

Answer 2

Firstable you need to check if your push notification working correctly. What i would do is temporary disable background fetching, and simply check if i get push.

If everything is ok i will turn background fetch back in Capabilities and try to send one in Debug. Even app is in background you can still have a breakpoints. If method is not called try look at the console.

I think you have a problem with push notification other than backgroundFetching.

If you are willing to try what happen when application is not in background mode but wass 9-killed you should put NSLogs in method. If you see NSLog in console then (Xcode -> ⌘⇧2 -> your device (connected) -> Console) you're good to go.

The production console is in background fetching useless to you unless you put NSLogs in your methods. But then you can only check if you successfully enter method and log a parameters.