didEnterRegion method are not calling when app is going to background?

-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region, this method is not called when app is going to background.What happen ?

Have you gone through our iBeacon tutorial?

http://developer.estimote.com/ibeacon/tutorial/part-2-background-monitoring/

It explains all the things necessary for beacon detection to work when the app is not running, such as Location Services permission, instantiating the beacon/location manager in the AppDelegate, etc.

You can also go to https://cloud.estimote.com/#/apps/add, and use the “Notification” template to see/test the background events.

i am Still facing problem for the implementation can you please send a code snippet or sample code of objective-c will be great helpfull for me.Thanks in advance.

Regard,
Veera

Have you tried the Notification template? Consider it the example code snippet (: