title: iOS - iCal rRule in a EKEvent recurrence rule
body: <p>I have an <code>iCal</code> file with a <code>rRule</code>: 
  <code>rRule = "FREQ=WEEKLY;UNTIL=20140425T160000Z;INTERVAL=1;BYDAY=TU,TH";</code></p>
  
  <p>I need to put this info in a <code>EKEvent</code>:</p>
  
  <pre><code>EKEvent *event;
  event.recurrenceRules = ...
  </code></pre>
  
  <p>I split the <code>rRule</code> and save it in <code>NSArray</code>:</p>
  
  <pre><code> NSArray * rules = [evento.rRule componentsSeparatedByString:@";"];
   event.recurrenceRules = rules;
  </code></pre>
  
  <p>But an error ocurrs:</p>
  
  <pre><code>-[__NSCFString relationForKey:]: unrecognized selector sent to instance 0x21283350
   *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString relationForKey:]: unrecognized selector sent to instance 0x21283350'
  </code></pre>
  
  <p>Can you help me?
  Thank you for advance.</p>