UIView changing its position in swift

Question

How do I make a UIView slide up with a touch of a button from its original position and them bring it back down with a touch of a button? Using Swift and Xcode 6.

Answer 1

 // MARK: - Properties

var bottomViewHeight: CGFloat = 200
var isViewHide = false

private let bottomView: UIView = {
    let view = UIView()
    view.backgroundColor = .red
    view.translatesAutoresizingMaskIntoConstraints = false
    return view
}()

private let showHideButton: UIButton = {
    let button = UIButton()
    button.setTitle("Show / Hide", for: .normal)
    button.setTitleColor(.black, for: .normal)
    button.translatesAutoresizingMaskIntoConstraints = false
    button.addTarget(self, action: #selector(showHideButtonTapped(_:)), for: .touchUpInside)
    return button
}()

// MARK: - Lifecycle

override func loadView() {
    super.loadView()

    view.addSubview(bottomView)

    NSLayoutConstraint.activate([
        bottomView.heightAnchor.constraint(equalToConstant: bottomViewHeight),
        bottomView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),
        bottomView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
        bottomView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor)
    ])

    view.addSubview(showHideButton)

    NSLayoutConstraint.activate([
        showHideButton.widthAnchor.constraint(equalToConstant: 200),
        showHideButton.heightAnchor.constraint(equalToConstant: 50),
        showHideButton.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor),
        showHideButton.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor)
    ])

}

override func viewDidLoad() {
    super.viewDidLoad()

    showHideView(isShow: isViewHide)

}

// MARK: - Selectors

@objc func showHideButtonTapped(_ sender: UIButton) {
    print("