title: anything similar to set_preferences for calabash ios
body: <p>I am testing a scenario where on third visit the 'give the feedback' form appears.</p>
  
  <p>For android I've used the set_preference method to set the variable ( 'VisitCount' => 2) .Then I am just visiting once and then I see the 'give the feedback' form.This works perfectly fine.</p>
  
  <p>However for iOS I didn't find anything similar . Can anyone suggest how I can do this.</p>