How can I animate displaying UIPickerView after pressing button?

Question

I want to animate my UIPickerView after pressing the button. I already have coded my UIPickerView to be hidden on viewDidLoad and not hidden after pressing a button, but it does

Answer 1

Swift 5: Slide up animation

1- Set hight to 216 (PickerView Standard).

2- Set leading an trailing to safe Area.

3- Set Bottom to "SuperViewBottom" as -216.

4- Make a IBOutlet from line 3 as NSLayoutConstraint optional.

and then:

import UIKit

class ViewController: UIViewController {

 override func viewDidLoad() {

 super.viewDidLoad()

 bottom.constant = -216

}

@IBOutlet weak var bottom: NSLayoutConstraint!

-(IBAction)button:(id)sender
{
   UIView.animate(withDuration: 0.2, delay: 0.0, options: .curveEaseIn, animations:
        {
            self.bottom.constant = 0
        self.view.layoutIfNeeded()
        }) { (AnimationComplete ) in }
}

 override func touchesBegan(_ touches: Set, with event: UIEvent?) {
       

        UIView.animate(withDuration: 0.2, delay: 0.0, options: .curveEaseIn, animations:
        {
            self.bottom.constant = -216
        self.view.layoutIfNeeded()
        }) { (AnimationComplete ) in }
   
    }


}

it should working like Apple standard animation.

Good luck