AsyncTask in viewDidLoad

Question

I'm working with a async Task function in my viewDidLoad, by the returned response I'm changing the view (colors, text...), but I have "errors":

• sometimes when I change view and I come back to the view, I don't get my view background in orange, but I get it in Green (the green is returned after the response of the asynctask function) so it's not normal when I come back to the view it have to reload it...

• sometimes the view still in a orange background, but the function is already passed...

      super.viewDidLoad()
  
  self.lblUpdate.text = "Mise à jour des nouveaux paramètres en cours..."
  self.viewUpdate.backgroundColor = UIColor.orange
  self.hideUpdateConstraint.isActive = false
  self.updateTopConstraint.isActive = true
  self.updateBottomConstraint.isActive = true
  
  if Reachability.isConnectedToNetwork() == true {
  
      self.updateDown = true
  
      Reachability.checkUrl(urlString:Configuration.MyVariables.url, finished: { isSuccess in
  
  
          if isSuccess == true {
  
              ProcessingTasks.updateSimulationParams()
              self.lblUpdate.text = "Les nouveaux paramètres (taux, durée, montant...) ont été mis à jour."
              self.viewUpdate.backgroundColor = UIColor(red: 151/255, green: 232/255, blue: 84/255, alpha: 1.0)
              print("ok c bon")
  
              self.updateDown = false
  
  
          } else {
              self.updateDown = true
              self.lblUpdate.text = "Les nouveaux paramètres (taux, durée, montant...) n'ont pas pu être mis à jour car notre service est actuellement indisponible."
              self.viewUpdate.backgroundColor = UIColor.red
          }
      })
  } else {
      updateDown = true
      self.lblUpdate.text = "Les nouveaux paramètres  (taux, durée, montant...) n'ont pas pu être mis à jour car vous ne disposez pas d'une connexion internet."
      self.viewUpdate.backgroundColor = UIColor.red
  }
  
  self.hideUpdateConstraint.isActive = true
  self.updateTopConstraint.isActive = false
  self.updateBottomConstraint.isActive = false
  self.hideUpdateConstraint.constant = 20
  self.viewUpdate.isHidden = true
  
  
  view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(SimulationViewController.handleTap(_:))))
  

Answer 1

Short suggestion. Try to override "viewDidAppear" function instead of "viewDidLoad". "viewDidAppear" should be triggered before view changes. "viewDidload" only triggered on views first load.

override func viewDidAppear() {      
    //Enter your code here       
}