Set up a UITableView to get the default animation when working with a UISearchController like seen in the Apple iOS News app

NewsTableViewVC.swift

//
//  NewsTableViewVC.swift
//  TestApp
//
//  Created by Shawn Frank on 16/02/2022.
//

import UIKit

fileprivate class CustomCell: UITableViewCell
{
    static let identifier = "CustomCell"
    
    let mainView = UIView()
    
    override init(style: UITableViewCell.CellStyle,
                  reuseIdentifier: String?)
    {
        super.init(style: style,
                   reuseIdentifier: reuseIdentifier)
        
        setup()
    }
    
    required init?(coder: NSCoder)
    {
        fatalError("init(coder:) has not been implemented")
    }
    override func layoutSubviews()
    {
        
    }
    
    private func setup()
    {
        mainView.backgroundColor = .gray
        mainView.translatesAutoresizingMaskIntoConstraints = false
        contentView.addSubview(mainView)
        contentView.backgroundColor = .clear
        
        mainView.leadingAnchor
            .constraint(equalTo: contentView.leadingAnchor,
                        constant: 15).isActive = true
        
        mainView.topAnchor
            .constraint(equalTo: contentView.topAnchor,
                        constant: 15).isActive = true
        
        mainView.trailingAnchor
            .constraint(equalTo: contentView.trailingAnchor,
                        constant: -15).isActive = true
        
        mainView.bottomAnchor
            .constraint(equalTo: contentView.bottomAnchor,
                        constant: -15).isActive = true
        
        mainView.layer.cornerRadius = 15
        contentView.clipsToBounds = true
    }
}

class NewsTableViewVC: UIViewController, UITableViewDataSource, UITableViewDelegate
{
    private let searchVC: UISearchController = {
        let sc = UISearchController(searchResultsController: nil)
        sc.obscuresBackgroundDuringPresentation = true
        sc.searchBar.placeholder = "Search"
        sc.searchBar.autocapitalizationType = .allCharacters
        return sc
    }()
    
    private let tableView = UITableView()
    
    override func viewDidLoad()
    {
        super.viewDidLoad()
        
        // Just to show it's different from the first
        view.backgroundColor = .black
        
        setUpNavigationBar()
        setUpTableView()
    }
    
    private func setUpNavigationBar()
    {
        //NAVIGATIONBAR:
        title = "Weather"
        
        navigationController?.navigationBar.isHidden = true
        navigationController?.navigationBar.largeTitleTextAttributes = [.foregroundColor: UIColor.white]
        
        //NAVIGATION ITEM:
        navigationItem.searchController = searchVC
        
        //UISEARCHBARCONTROLLER:
        //searchVC.searchResultsUpdater = self
    }
    
    private func setUpTableView()
    {
        tableView.translatesAutoresizingMaskIntoConstraints = false
        tableView.register(CustomCell.self,
                           forCellReuseIdentifier: CustomCell.identifier)
        tableView.dataSource = self
        tableView.delegate = self
        tableView.backgroundColor = .clear
        view.addSubview(tableView)
        
        // Auto Layout
        tableView.leadingAnchor
            .constraint(equalTo: view.leadingAnchor,
                        constant: 0).isActive = true
        
        // This important, configure it to the top of the view
        // NOT the safe area margins to get the desired result
        tableView.topAnchor
            .constraint(equalTo: view.topAnchor,
                        constant: 0).isActive = true
        
        tableView.trailingAnchor
            .constraint(equalTo: view.trailingAnchor,
                        constant: 0).isActive = true
        
        tableView.bottomAnchor
            .constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor,
                        constant: 0).isActive = true
        
        navigationController?.navigationBar.isHidden = false
    }
    
    // Just for testing
    func randomColor() -> UIColor
    {
        let red = CGFloat(arc4random_uniform(256)) / 255.0
        let blue = CGFloat(arc4random_uniform(256)) / 255.0
        let green = CGFloat(arc4random_uniform(256)) / 255.0
        
        return UIColor(red: red, green: green, blue: blue, alpha: 1.0)
    }

    private func updateSegmentTextColor(_ rootView: UIView)
    {
        for subview in rootView.subviews
        {
            if let label = subview as? UILabel
            {
                // Any color you want
                label.textColor = randomColor()
            }
            
            updateSegmentTextColor(subview)
        }
    }
    
    func addControl()  {
        let items = ["One", "Two", "Three"]
        let segmentedControl = UISegmentedControl(items: items)
        segmentedControl.frame = CGRect(x: 35, y: 200, width: 250, height: 50)
        segmentedControl.center = view.center
        segmentedControl.selectedSegmentIndex = 1
        segmentedControl.tintColor = .blue
        view.addSubview(segmentedControl)
        
        // custom function
        updateSegmentTextColor(segmentedControl)
    }
    
    func tableView(_ tableView: UITableView,
                   numberOfRowsInSection section: Int) -> Int
    {
        return 15
    }
    
    func tableView(_ tableView: UITableView,
                   cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        let cell
            = tableView.dequeueReusableCell(withIdentifier: CustomCell.identifier)
            ?? UITableViewCell()
        
        return cell
    }
    
    func tableView(_ tableView: UITableView,
                   heightForRowAt indexPath: IndexPath) -> CGFloat
    {
        return 150
    }
}