title: How to loop through JSON with SwiftyJSON?
body: <p>I have a json that I could parse with SwiftyJSON :</p>
  
  <pre><code>if let title = json["items"][2]["title"].string {
       println("title : \(title)")
  }
  </code></pre>
  
  <p>Works perfectly.</p>
  
  <p>But I couldn't loop through it. I tried two methods, the first one is</p>
  
  <pre><code>// TUTO :
  //If json is .Dictionary
  for (key: String, subJson: JSON) in json {
      ...
  }
  // WHAT I DID :
  for (key: "title", subJson: json["items"]) in json {
      ...
  }
  </code></pre>
  
  <p>XCode didn't accept the for loop declaration.</p>
  
  <p>The second method :</p>
  
  <pre><code>// TUTO :
  if let appArray = json["feed"]["entry"].arrayValue {
       ...
  }
  // WHAT I DID :
  if let tab = json["items"].arrayValue {
       ...
  }
  </code></pre>
  
  <p>XCode didn't accept the if statement.</p>
  
  <p>What am I doing wrong ?</p>