title: NSDictionary objectForKey is returning nil value
body: <p>I have a dictionary like this</p>
  
  <pre><code>123456
  {
     "aaa"
     "aaav"
  }
  </code></pre>
  
  <p>But when i try to get these values in <code>NSArray</code> using <code>objectForKey</code>, I am getting <code>nil</code>.</p>
  
  <p>The key I am using is a string. </p>
  
  <p>Code :</p>
  
  <pre><code>NSArray *arr = [userdetails objectForKey:str]
  </code></pre>
  
  <p>Where userdetails is an <code>NSDictionary</code> and str is <code>NSString</code> which contains the key.</p>