title: Check if NSString contains any numbers and is at least 7 characters long
body: <p>So I imagine that I need a regex statement to do this but I haven't had to do any regex with objective c yet, and I haven't written a regex statement in like a year.</p>
  
  <p>I think it should be like ((?=.*[0-9]).{7,1000})</p>
  
  <p>How do I put this into an objective c string comparison and evaluate the results?</p>
  
  <p>Also is my regex correct?</p>