title: iOS: augmented reality, add object to cam
body: <p>I am working on an iOS app which has a little augmented reality part. Namely, I want to highlight a geolocation point using the cam. For instance, assume I have a friend address and coordinate. I go to that place but do not find the house. I want using my cam to display an arrow next to the house (I know the precision won't be that good but precision is not the purpose of the app, it is just an example to explain the principle).</p>
  
  <p>So, here is the question. How can I do it simply ? Using a framework ? Which one ? Doing simple calculation using geolocation and the gyroscopic information of the iPhone.</p>
  
  <p>Thanks!</p>