Zhandos Bolatbekov
78 lines
2.3 KiB
Swift
78 lines
2.3 KiB
Swift
//
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// BaseScrollView.swift
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// PrivadoVPN
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//
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// Created by Lizaveta Malinouskaya on 15.07.21.
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// Copyright © 2021 Privado LLC. All rights reserved.
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//
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import Foundation
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import UIKit
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class BaseScrollView: UIScrollView, ReactivelyConstrained {
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// MARK: - Properties
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var portraitConstraints = [NSLayoutConstraint]()
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var landscapeConstraints = [NSLayoutConstraint]()
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var sharedConstraints = [NSLayoutConstraint]()
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let layoutEmitter = Emitter<EmitterLayoutChangeType>()
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// MARK: - Init
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init() {
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super.init(frame: .zero)
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self.layoutEmitter.addReaction { [weak self] isLandscape -> ShouldContinueReceiveNotifications in
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guard let self = self else { return false }
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if isLandscape {
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NSLayoutConstraint.deactivate(self.portraitConstraints)
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NSLayoutConstraint.activate(self.landscapeConstraints)
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} else {
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NSLayoutConstraint.deactivate(self.landscapeConstraints)
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NSLayoutConstraint.activate(self.portraitConstraints)
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}
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NSLayoutConstraint.activate(self.sharedConstraints)
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return true
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}
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self.addKeyboardObserverIfNeeded()
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) { nil }
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// MARK: - Private
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private func addKeyboardObserverIfNeeded() {
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guard self is KeyboardListening else { return }
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(self.keyboardWillShowObserved),
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name: UIResponder.keyboardWillShowNotification,
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object: nil
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)
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(self.keyboardWillHideObserved),
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name: UIResponder.keyboardWillHideNotification,
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object: nil
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)
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}
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@objc
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private func keyboardWillShowObserved(_ notification: Notification) {
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(self as? KeyboardListening)?.keyboardWillShow(notification)
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}
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@objc
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private func keyboardWillHideObserved(_ notification: Notification) {
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(self as? KeyboardListening)?.keyboardWillHide(notification)
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}
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}
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