ChooseCountryViewController.swift

import UIKit
import RxSwift
import RxCocoa

class ChooseCountryViewController: UIViewController {
    
    // MARK: - Lifecycle Methods
    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
        setupNavItem()
        
        bindTableView()
        bindSearchBar()
        bindCloseItem()
        bindHUD()
        
        viewModel.fetchCountries { [weak self] (errorMessage) in
            self?.showMessage(errorMessage)
        }
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        setupNavBar()
    }
    
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.viewModel.didClose.onNext(())
    }

    // MARK: - Properties
    let disposeBag = DisposeBag()
    var viewModel: ChooseCountryViewModel!
    ....
}

// MARK: - Binding
extension ChooseCountryViewController {
    func bindTableView() {
        viewModel.filteredCountries
            .bind(to: tableView.rx.items(cellIdentifier: "CountryTableViewCell", cellType: CountryTableViewCell.self)) { (index, viewModel, cell) in
                cell.viewModel = viewModel
            }
            .disposed(by: disposeBag)
        
        tableView.rx.modelSelected(CountryViewModel.self)
            .map { $0.code }
            .bind(to: viewModel.selectedCountry)
            .disposed(by: disposeBag)
    }
    
    func bindCloseItem() {
        closeItem.rx.tap
            .bind(to: viewModel.didClose)
            .disposed(by: disposeBag)
    }
    
    func bindSearchBar() {
        searchBar.rx.text
            .orEmpty
            .bind(to: viewModel.searchText)
            .disposed(by: disposeBag)
    }
    
    func bindHUD() {
        viewModel.isLoading
            .subscribe(onNext: { [weak self] isLoading in
                isLoading ? self?.showProgress() : self?.hideProgress()
            })
            .disposed(by: disposeBag)
    }
}

.....