title: ios - Spritekit - How to calculate the distance between two nodes?
body: <p>I have two sknodes on the screen. What is the best way to calculate the distance ('as the crow flies' type of distance, I don't need a vector etc)?</p>
  
  <p>I've had a google and search on here and can't find something that covers this (there aren't too many threads on stackoverflow about sprite kit)</p>