title: iOS 9 : SecItemCopyMatching returns successful status code but key is nil
body: <p>I am trying to import private key into keychain using<code>SecItemAdd</code> method returns <code>OSStatus</code> 0 but when I try to retrieve that key from key chain using <code>SecItemCopyMatch</code>, It returns nil data but <code>OSStatus</code> is 0 means success</p>
  
  <p>Please refer from Apple developer forum <a href="https://forums.developer.apple.com/thread/13748" rel="nofollow">link</a></p>