问题
My app receives push notifications successfully if run at least once per boot both in the background and when force closed (thanks to PushKit).
If I reboot the device, I won't receive any pushes until I launch the app at least once.
How can I get this scenario working? I'm running latest Xcode and iOS (8.3)
If I leave the app running in the background when I reboot the device, the app still shows up in the recents menu however no pushes are received and no AppDelegate entry points are hit (that I have anyways).
- All push/notification permissions are enabled as well as
Background App Refresh - Background Mode Capabilities are enabled (VoIP, push, fetch)
回答1:
The problem was that the app was going dormant before the callback to update credentials.
The solution was to start a background task in didLaunchWithOptions and end the background task in the didUpdatePushCredentials function.
来源：https://stackoverflow.com/questions/30195091/troubleshooting-post-boot-push-notification-delivery-failures