How to disappear sidemenu without button in swift 4

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      else {
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      }
  
  }
  
  }
  

  Here is my parser.

  import Foundation
  
  struct RSSItem {
  var title: String
  var link: String
  }
  
  class FeedParser: NSObject, XMLParserDelegate
  {
   private var rssItems: [RSSItem] = []
   private var currentElement = ""
  
  private var currentTitle: String = "" {
      didSet {
          currentTitle = currentTitle.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
      }
  
  }
  private var currentLink: String = "" {
      didSet {
          currentLink = currentLink.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
      }
  
  }
  private var parserCompletionHandler: (([RSSItem]) -> Void)?
  func parseFeed(url: String, completionHandler:(([RSSItem]) -> Void)?)
  {
      self.parserCompletionHandler = completionHandler
  
      let request = URLRequest(url: URL(string: url)!)
      let urlSession = URLSession.shared
      let task = urlSession.dataTask(with: request) { (data,response, error) in
          guard let data = data else {
              if let error = error {
                  print(error.localizedDescription)
              }
              return
          }
          // parse our xml data
          let parser = XMLParser(data: data)
          parser.delegate = self
          parser.parse()
      }
      task.resume()
  }
  
  //MARK: -XML PArser Delegate
  func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String] = [:]) {
      currentElement = elementName
      if currentElement == "item" {
          currentTitle = ""
          currentLink = ""
      }
  }
  
  func parser(_ parser: XMLParser, foundCharacters string: String) {
      switch currentElement {
      case "title": currentTitle += string
      case "link": currentLink += string
      default: break
      }
  }
  
  func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
      if elementName == "item" {
          let rssItem = RSSItem(title: currentTitle, link: currentLink)
          self.rssItems.append(rssItem)
      }
  }
  
  func parserDidEndDocument(_ parser: XMLParser) {
      print("The total size is ",rssItems.count)
      print("End of document")
      parserCompletionHandler?(rssItems)
  }
  
  func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
      print(parseError.localizedDescription)
  }
  
  
  
  }
  

  I have two areas of print testing one with the parser in the function parserDidEndDocument and the other in the table in the addData function. The order of the printed statements is the addData one first, which I find to be weird, and the parserDidEndDocument second. The first one says size is 0, while the other says size is 10.
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