title: UIAlertController change other UIView
body: <p>i spend lot of time but i can not figure out how can fix this problem  . I made a picker view that is appearing from bottom . it is working fine but problem is when any other event shown  alert view . same time  picker view come from top . </p>
  
  <p>note . before alert view appear . picker view working fine . after alert view appear then piker view come to the top . </p>
  
  <p><img src="https://i.stack.imgur.com/selLQ.png" alt="here before alert"></p>
  
  <p>bottom appear piker view code :</p>
  
  <pre><code>extension RegistrationController {
  
  
      func showSettings(selecteIndex : Int) {
          //show menu
  
          if let window = UIApplication.shared.keyWindow {
  
              blackView.backgroundColor = UIColor(white: 0, alpha: 0.5)
  
              blackView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleDismiss)))
  
              window.addSubview(blackView)
  
              window.addSubview(bottomView)
  
              bottomView.addSubview(titlebottomView)
  
              titlebottomView.addSubview(bottomViewActionLabel)
              titlebottomView.addSubview(doneButton)
  
              let height: CGFloat = 150
              let y = window.frame.height - height
  
              bottomView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: height)
  
              titlebottomView.frame = CGRect(x: 0, y: 0, width: window.frame.width, height: 40)
  
                  bottomView.addSubview(pikerViewForGender)
  
                  bottomViewActionLabel.text = "Select your Gender"
  
                  bottomView.addSubview(pikerViewForGender)
                  pikerViewForGender.frame = CGRect(x: 0, y: 44, width: bottomView.frame.width, height: bottomView.frame.height - 40)
  
              self.bottomViewActionLabel.frame = CGRect(x: 13, y: 0, width: 150, height: 40)
              self.doneButton.frame = CGRect(x: window.frame.width - 80 , y: 0, width: 80, height: 40)
  
              blackView.frame = window.frame
              blackView.alpha = 0
  
              UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
  
                  self.blackView.alpha = 1
  
                  self.bottomView.frame = CGRect(x: 0, y: y, width: window.frame.width, height: height)
  
  
              }, completion: nil)
          }
      }
  
      func handleDismiss() {
  
  
          UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
  
              self.blackView.alpha = 0
  
              if let window = UIApplication.shared.keyWindow {
                  self.bottomView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height)
  
  
              }
  
          }) { (completed: Bool) in
  
              print("good way ....")
  
          }
      }
  
  }
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/Dz7JB.png" alt="when showing alert"></p>
  
  <p>alert view code :</p>
  
  <pre><code>extension UIViewController {
  
     func showAlert(message: String ){
  
          let alert = UIAlertController(title: "Whoops", message: message, preferredStyle: UIAlertControllerStyle.alert)
          alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: {(_ action: UIAlertAction) -&gt; Void in
  
              alert.dismiss(animated: true, completion: nil)
  
          }))
          self.present(alert, animated: true, completion: nil)
      }
  }
  </code></pre>