Core Bluetooth and backgrounding: Detection of a device and triggering an action, even after being days in background mode?

Question

I\'ve written an app that needs to get informed when a certain Bluetooth Low Energy device comes within range. If the BLE device gets noticed my app just stores a timestamp.

Answer 1

No, iOS gives no guarantee that your app keeps alive in the background. The docs say:

However, this method may be called in situations where the application is running in the background (not suspended) and the system needs to terminate it for some reason.

(Documentation of applicationWillTerminate)