title: Find nearest location from existing coordinates mapkit
body: <p>I am in the process of developing an iphone app (objective C) for a client who has multiple stores. I have the coordinates (latitude,long) of all the stores (20) in an array. </p>
  
  <p>At the moment I am thinking of looping through the array of stores' coordinates and get the distance from the user's current location to the store's location and then add them into array and does sorting on the lowest distance. </p>
  
  <p>Is this a correct approach or very resource hungry?</p>
  
  <p>The nearest question of SOF was this one but it is in python:
  <a href="https://stackoverflow.com/questions/7092752/extracting-nearest-stores-based-on-coordinates-from-xml-file">extracting nearest stores</a></p>
  
  <p>Thank you in advance for your advice. </p>