title: type '[[String : AnyObject]]' has no subscript members
body: <pre><code>[let appUrl = URL(string: "some link")!
  
  let data = try Data(contentsOf: appUrl)
  
  let json2 = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as! [String : AnyObject]
  
  let post = json2["posts"] as? [[String:AnyObject]]
  
  // here I want to connect to image but its still tell me the problem  
  //type '[[String : AnyObject]]' has no subscript members              
  let image = post["image"] as [[String:AnyObject]]
  print(image)
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/W6kPo.png" alt="image"></p>