什么是iOS开发中的“ CATransaction同步”警告？这会导致我的应用被应用商店拒绝吗？

Question

我实现了带有搜索控件的表格视图。下面的代码总结了这一切。但是它会引发警告：在事务内调用[CATransaction syncize]

我不确定它的含义以及它对我的应用有多严重的影响。

如果这是有害的，您能否根据我的代码帮助我消除此错误：

import UIKit

class CountryTableViewController: UITableViewController, UISearchResultsUpdating {

    let countriesArray = ["Afghanistan", "Albania", "Algeria", "Afghanistan", "Albania", "Algeria", "Afghanistan", "Albania", "Algeria", "Afghanistan", "Albania", "Algeria", "Afghanistan", "Albania", "Algeria", "Afghanistan", "Albania", "Algeria", "Afghanistan", "Albania", "Algeria"]
    let  countrycodes = ["+93", "+355", "+213", "+93", "+355", "+213", "+93", "+355", "+213", "+93", "+355", "+213", "+93", "+355", "+213", "+93", "+355", "+213", "+93", "+355", "+213"]
    var filteredArray = [String]()
    var searchController = UISearchController()
    var resultsController = UITableViewController()

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.


        let cancelButton: UIBarButtonItem = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancel))
        self.navigationItem.leftBarButtonItem = cancelButton

        let searchButton: UIBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: self, action: #selector(searchButtonAction))
        searchButton.image = UIImage(named: "search")
        self.navigationItem.rightBarButtonItem = searchButton


        searchController = UISearchController(searchResultsController: resultsController)

        searchController.searchResultsUpdater = self
        resultsController.tableView.delegate = self
        resultsController.tableView.dataSource = self

        definesPresentationContext = true
    }

    func updateSearchResults(for searchController: UISearchController)
    {
        filteredArray = countriesArray.filter({ (countriesArray:String) -> Bool in
            if countriesArray.contains(searchController.searchBar.text!)
            {
                return true
            }
            else
            {
                return false;
            }

        })
        resultsController.tableView.reloadData()

    }

    @objc func cancel() {
        self.dismiss(animated: true, completion: nil)


    }
    @objc func searchButtonAction() {
        self.dismiss(animated: true, completion: nil)
        tableView.tableHeaderView = searchController.searchBar
        self.searchController.isActive = true
        self.searchController.searchBar.text = ""
        self.navigationItem.rightBarButtonItem = nil
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if tableView == resultsController.tableView
        {
            return filteredArray.count
        }
        else
        {
            return countriesArray.count
        }

    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        let cell = UITableViewCell()

        if tableView == resultsController.tableView
        {
            cell.textLabel?.text = filteredArray[indexPath.row]
            cell.detailTextLabel?.text = countrycodes[indexPath.row]
            cell.imageView?.image = UIImage (named: "Flag0")
        }
        else
        {
            cell.textLabel?.text = countriesArray[indexPath.row]
            cell.detailTextLabel?.text = countrycodes[indexPath.row]
            cell.imageView?.image = UIImage (named: "Flag0")
        }


        return cell

    }
    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        print(indexPath.row, indexPath.section)


    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}