title: convert int to nsumber*
body: <p>I have </p>
  
  <p>NsNumber *object = nill;</p>
  
  <p>I want to set object = 1 </p>
  
  <p>it raise error in conversion </p>
  
  <p>how to convert int to nsnumber  and want to increment the nsnumber by 1 </p>
  
  <p>best regards </p>