SergLam

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var mySrchBar: UISearchBar!
   private var lastSearchTxt = ""
   
    override func viewDidLoad() {
        super.viewDidLoad()
     }

laurilehmijoki

import RxSwift // Version 3.2.0
import RxCocoa // Version 3.2.0

func keyboardHeight() -> Observable<CGFloat> {
    return Observable
            .from([
                    NotificationCenter.default.rx.notification(NSNotification.Name.UIKeyboardWillShow)
                            .map { notification -> CGFloat in
                                (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.height ?? 0
                            },