title: Can I specify a objectId when creating new PFObjects?
body: <p>Swift / iOS</p>
  
  <p>Can anyone tell me if it is possible to specify the PFObject <code>objectId</code> value when creating new objects?</p>
  
  <p>I've obviously attempted but the save fails.  (which might just be the answer)</p>
  
  <p>The reason I am asking is I wondered if anyone had found a "trick" that would allow me to specify.</p>
  
  <p>I am using <code>PFObject.saveInBackground {</code> method to persist the new object. </p>