title: How to create NSPredicate to search for Events in Calendar?
body: <p>I tried to use following predicate to search for events in the Calendar but i'm getting the following 
  exception 'NSInvalidArgumentException', reason: 'predicate was not created with EKCalendarStore methods'</p>
  
  <pre>
  
  //[_sender objectAtIndex:0] is Name of the event and [_sender objectAtIndex:1] is location of the event
  
  NSPredicate *prediction=[NSPredicate predicateWithFormat:@"(SELF contains[cd] %@)", [NSString stringWithFormat: @"%@%@",[_sender objectAtIndex:0],[_sender objectAtIndex:1]]];
  NSArray*events=[eventStore eventsMatchingPredicate:prediction];
  </pre>