Avoiding Keyboard about aloestackview HOT 2 CLOSED

import AloeStackView

/// This class adds automatic scroll functionality when keyboard will show or hide.
open class AutoScrollStackViewController: AloeStackViewController {

    // MARK: Properties

    open var defaultContentInset: UIEdgeInsets = .zero {
        didSet {
            updateContentInset(with: defaultContentInset)
        }
    }

    open var keyboardTopMargin: CGFloat = 20

    // MARK: Lifecycle

    open override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        addObservers()
    }

    open override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)

        NotificationCenter.default.removeObserver(self)
    }

    // MARK: Keyboard Observers

    @objc
    open func keyboardWillShow(_ notification: Notification) {
        let keyboardFrameValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue
        guard var keyboardFrame = keyboardFrameValue?.cgRectValue else { return }
        keyboardFrame = stackView.convert(keyboardFrame, from: nil)
        let keyboardSize = keyboardFrame.size

        let bottomInset = keyboardSize.height + keyboardTopMargin
        let keyboardInset = UIEdgeInsets(
            top: defaultContentInset.top,
            left: defaultContentInset.left,
            bottom: bottomInset,
            right: defaultContentInset.right
        )

        updateContentInset(with: keyboardInset)
    }

    @objc
    open func keyboardWillHide(_ notification: Notification) {
        updateContentInset(with: defaultContentInset)
    }

    // MARK: Helpers

    private func updateContentInset(with inset: UIEdgeInsets) {
        stackView.contentInset = inset
        stackView.scrollIndicatorInsets = inset
    }

    private func addObservers() {
        let nc = NotificationCenter.default
        nc.addObserver(
            self, selector: #selector(keyboardWillShow(_:)),
            name: UIResponder.keyboardWillShowNotification, object: nil
        )
        nc.addObserver(
            self, selector: #selector(keyboardWillHide(_:)),
            name: UIResponder.keyboardWillHideNotification, object: nil
        )
    }

}