title: How can I see, all my chatrooms in one CollectionViewController?
body: <p>So I tried to make all chatrooms into one CollectionViewController but I can only see one and in that one I can't see the image and the label I named the chatroom. All I see is a white picture and the original label. My code:</p>
  
  <pre><code>func CreateNewRoom(user: User, caption: String, data: NSData) {
      let filePath = "\(user.uid)/\(Int(NSDate.timeIntervalSinceReferenceDate))"
      let metaData = StorageMetadata()
      metaData.contentType = "image/jpg"
      storageRef.child(filePath).putData(data as Data, metadata: metaData) { (metadata, error) in
          if let error = error {
              print("Error uploading: \(error as NSError)")
              return
          }
          let chatRef = self.storageRef.child("images/chat.jpg")
  
          chatRef.downloadURL { url, error in
              if error != nil {
  
              } else {
  
              }
          }
          if Auth.auth().currentUser != nil {
              let idRoom = self.BASE_REF.child("rooms").childByAutoId()
              idRoom.setValue(["caption": caption, "thumbnailUrlFromStorage": self.storageRef.child(metadata!.path!).description, "fileUrl": self.fileUrl])
          }
      }
  }
  func fetchDataFromServer(callback: @escaping (Room) -&gt; ()) {
      DataService.dataService.ROOM_REF.observeSingleEvent(of: .childAdded) { (snapshot) in
  
          print("FOUND ROOM "+snapshot.key)
  
          let room = Room(key: snapshot.key, snapshot: snapshot.value as! Dictionary&lt;String, AnyObject&gt;)
          callback(room)
      }
  }
  </code></pre>