CoreBluetooth：后台模式下的范围检测

Question

I'm working on an App that connects with a peripheral and needs to watch it's state.

When the App is in foreground range detection is no probleme: I just update the RSSI value from time to time and translate it in a range.

Now I would like to use the app with a CoreBluetooth Background Mode. I want to send the user a notification when the device is out of a certain range.

How can I achieve this behavior?

Answer 1

You can start ranging your peripheral from AppDelegate.m, right after your application start on application didFinishLaunchingWithOptions: , set the delegate to self, and notify yourself using UILocalNotification .

There's example of it using CoreLocation instead of CoreBluetooth here .

Don't forget to modify your info.Plist for communicating in background mode.