How to use Bluetooth GPS module in an app?

What iOS Framework do I need to use in order to use Bluetooth interaction inside my app?

• I want my app to catch/see a list of nearby bluetooth devices (with my app installed and bluetooth on of course) and be able to communicate/interact together via bluetooth. Which iOS Framework/other tool do I need to add into my app? How does I get this to work? Any other better options are welcome, I was thinking instead of using the bluetooth (the method I described above) it wouldn't be better to use just a Map (MapKit Framework) and show in a specific range the users who have this app opened also? Or do I need bluetooth? Apps like Waze, Foursquare and Tinder kinda uses the Map (geolocalization) approach, but just shows actions/posts/check-ins of the users, doesn't show a list of online/active users in range. Any solutions? In advance, thanks!

• Answer:

  If you want to interact with other nearby iOS devices running your app, you can use Multipeer Connectivity framework introduced in iOS 7 (https://developer.apple.com/library/ios/documentation/MultipeerConnectivity/Reference/MultipeerConnectivityFramework/Introduction/Introduction.html) or GameKit for older OS versions (https://developer.apple.com/library/ios/documentation/GameKit/Reference/GKSession_Class/Reference/Reference.html#//apple_ref/doc/uid/TP40008258) If you want your app to be able to interact with any BTLE devices nearby and control them, you should be looking at the Core Bluetooth framework (https://developer.apple.com/library/ios/documentation/CoreBluetooth/Reference/CoreBluetooth_Framework/_index.html) If you just want to show nearby users on a map, then use MapKit and Core Location (https://developer.apple.com/library/ios/documentation/CoreLocation/Reference/CoreLocation_Framework/_index.html), update the users' GPS location on a server and use these coordinates to show their position on a map. You don't need bluetooth connections in that case.