title: Decode a Base64 string in objective-c
body: <p>I'm new in objecive-C and i would like to decode a NSString encoded in Base64.</p>
  
  <p>Have you any idea to help me?</p>
  
  <p>NSString encoded:</p>
  
  <blockquote>
    <p>eyJjbGUiOiJwOW5oOTk3eDRxdhpnZzciLCJ1cmwiOiJtbGtqcW1sa3FzbWxmbXFsanFkln0</p>
  </blockquote>
  
  <p>NSString i try to find:</p>
  
  <blockquote>
    <p>{"cle":"p9nh997x4qvgg7","url":"mlkjqmlkqsmlfmqljqd}</p>
  </blockquote>