title: Converting int into NSString
body: <p>I want to convert a random int number in the <code>NSString</code> and then assign the NSString to another <code>NSString</code> but it crashes the app</p>
  
  <p>I am doing the following</p>
  
  <pre><code>int mynumber =(arc4random() % 1000 );
  
  unique = [NSString stringWithFormat:@"%d",mynumber];
  
     NSLog(unique)
  
     NSString*test=unique;
  </code></pre>
  
  <p>it gives crash when i write last line;</p>
  
  <p>It also prints values when I nslog the <code>unique</code> string. </p>