I am writing an application that utilizes Apple's Push Notification Service. Some of the push notifications are based on the users location and should only be delivered if the user is a certain distance from an object. I don't want to continually update the user's position to my server and do the check that way, first, because of security reasons and second, to cut down on the network usage. Is there a way, when the push notification is received by the device, to do a check before the user is notified, and if it doesn't meet the criteria, discard the notification? Thanks for the help!
Nope, sadly you can't execute any code on the client side without the user clicking on the notification when the app is not launched. You'll have to do your check server-side to decide wether or not sending a push.