title: Correct URL encoding in Cocoa (ObjC)
body: <p>I am trying to URL encode an NSString but I can't seem to find the proper way (I'm new to Obj C). I have been searching around but can't find a decent answer. So:</p>
  
  <p>What is the correct, and modern, way to encode an NSString like a URL?</p>
  
  <p>Thanks in advance.</p>