In Xcode how can I detect the bump between two iphones?

Question

I want to do an app like Bump, where touching two iPhone I can detect them, does anybody know how can I detect the phisical bump of the iPhone?

Thanks a lot!

possible duplicate of [How does "bump" technology work?](http://stackoverflow.com/questions/3383447/how-does-bump-technology-work) — James Sumners, Feb 25 '12 at 15:54
This answer is with Bump API and I want to know only how to detect the Bump without their Api, thanks for your anwser — J. Carlos Fernandez, Feb 25 '12 at 15:57

score 5 · Answer 1 · edited May 23 '17 at 11:52

Use a combination of accelerometer events, geolocation and time.

Detect a physical bump in your app. Use the accelerometer to detect motion and sudden stopping of that motion.
Upload the bump event to your central server. A bump event includes geolocation and time.
On the central server determine if there is a matching bump event with similar attributes: time and location. If there are conflicts, such as in a crowd at a conference, simply ask the users to bump again.
If there is a matching unique bump event, notify both clients that a bump has occurred and match them up for further processing.

Also, see How does "bump" technology work?

score 2 · Accepted Answer · answered Sep 25 '12 at 04:37

2

While I also started out looking to do this myself, honestly using the Bump API was quick and painless...and it just worked. I would highly recommend that you check it out before trying to "roll your own"...

answered Sep 25 '12 at 04:37

Darren Ehlers

633
6
16

In Xcode how can I detect the bump between two iphones?

2 Answers2