import UIKit
  
  class VCNoiDungTraoDoi: UIViewController {
  
      static func getInstance() -> VCNoiDungTraoDoi {
          let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
          let vcOpen = storyboard.instantiateViewController(withIdentifier: "VCNoiDungTraoDoi") as! VCNoiDungTraoDoi
          return vcOpen
      }
  
      override func viewDidLoad() {
          super.viewDidLoad()
      }
  
      @IBAction func btnBackToTopClick(_ sender: Any) {
          _ = getVcRoot()?.changeCurrentController(VCHome.getInstance())
      }
  
      func getVcRoot() -> VCRoot? {
          return self.parent as? VCRoot
      }
  }