重新加載數據時刷新tableView閃爍

Question

因此，刷新函數由於索引超出範圍問題而導致應用程序崩潰。然後，我在第一次清空列表後添加了reloadData。現在我刷新時會出現閃爍，因爲它首先加載空列表，然後加載填充列表。我應該在哪裏清空列表或如何擺脫閃爍？使用SWIFT 3和的Xcode 8.2.1

func getData() 
{ 
    fetchedUsers.removeAll() 
    self.userTableView.reloadData() 

    //myphpfileurl 
    var request = URLRequest(url: URL(string: url)!) 
    request.httpMethod = "GET" 

    let configuration = URLSessionConfiguration.default 
    let session = URLSession(configuration: configuration, delegate: nil, delegateQueue: OperationQueue.main) 

    let task = session.dataTask(with: request) { (data, response, error) in 

     if (error != nil) { 
      print("Error") 
     } 
     else{ 
      do{ 
       let fetchedData = try JSONSerialization.jsonObject(with: data!, options: .mutableLeaves) as! NSArray 

       for eachFetchedUsers in fetchedData { 
        let eachUsers = eachFetchedUsers as! [String : Any] 
        let id = eachUsers["id"] as! String 
        let name = eachUsers["Nimi"] as! String 
        let email = eachUsers["Sahkoposti"] as! String 
        let company = eachUsers["Yritys"] as! String 

        self.fetchedUsers.append(Users(id : id, name: name, email : email, company: company)) 

       } 
       self.userTableView.reloadData() 
       self.refreshControl.endRefreshing() 
      } 
      catch{ 
       print("Error 2") 
      } 
     } 
    } 
    task.resume() 
} 

Answer 1

林嘗試像這樣重新加載表

DispatchQueue.main.async { 
     self.userTableView.reloadData() 
     self.refreshControl.endRefreshing() 
    }