title: Only iOS 7 crash [NSNull intValue]: unrecognized selector sent to instance
body: <p>I want to get data from JSON service. Only iOS 7 version crash when get data from JSON value. 
  It returns from JSON service below that:</p>
  
  <pre><code>{
      voteAverageRating = 0;
      voteCount = 0;
  }
  </code></pre>
  
  <p>My code</p>
  
  <pre><code>int voteCount = [listDic objectForKey:@"voteCount"] intValue] ;
  
  _LB_voteNumber.text = [NSString stringWithFormat:@"(%i)",voteCount];
  </code></pre>
  
  <p>Its work for iOS 5,5.1,6.0,6.1 but it crash only iOS7 version. It gave this error:</p>
  
  <blockquote>
    <p>0x00098117    _mh_execute_header [NSNull intValue]: unrecognized selector
    sent to instance</p>
  </blockquote>
  
  <p>Then i changed my code below that;</p>
  
  <pre><code>NSString *voteCount = [listDic objectForKey:@"voteCount"] ;
  
  _LB_voteNumber.text = [NSString stringWithFormat:@"(%@)",voteCount];
  </code></pre>
  
  <p>When runs this code. It crashed again only iOS 7 version. It gave this error:</p>
  
  <blockquote>
    <p>0x00098117    _mh_execute_header [NSNull length]: unrecognized selector
    sent to instance</p>
  </blockquote>
  
  <p>How can i solve this problem ? </p>