133 lines
5.5 KiB
Swift
133 lines
5.5 KiB
Swift
//
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// PopupDialog+Keyboard.swift
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//
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// Copyright (c) 2016 Orderella Ltd. (http://orderella.co.uk)
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// Author - Martin Wildfeuer (http://www.mwfire.de)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import Foundation
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import UIKit
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/// This extension is designed to handle dialog positioning
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/// if a keyboard is displayed while the popup is on top
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internal extension PopupDialog {
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// MARK: - Keyboard & orientation observers
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/*! Add obserservers for UIKeyboard notifications */
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func addObservers() {
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NotificationCenter.default.addObserver(self, selector: #selector(orientationChanged),
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name: UIDevice.orientationDidChangeNotification,
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object: nil)
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NotificationCenter.default.addObserver(self,
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selector: #selector(keyboardWillShow),
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name: UIResponder.keyboardWillShowNotification,
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object: nil)
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NotificationCenter.default.addObserver(self,
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selector: #selector(keyboardWillHide),
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name: UIResponder.keyboardWillHideNotification,
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object: nil)
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NotificationCenter.default.addObserver(self,
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selector: #selector(keyboardWillChangeFrame),
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name: UIResponder.keyboardWillChangeFrameNotification,
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object: nil)
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}
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/*! Remove observers */
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func removeObservers() {
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NotificationCenter.default.removeObserver(self,
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name: UIDevice.orientationDidChangeNotification,
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object: nil)
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NotificationCenter.default.removeObserver(self,
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name: UIResponder.keyboardWillShowNotification,
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object: nil)
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NotificationCenter.default.removeObserver(self,
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name: UIResponder.keyboardWillHideNotification,
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object: nil)
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NotificationCenter.default.removeObserver(self,
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name: UIResponder.keyboardWillChangeFrameNotification,
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object: nil)
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}
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// MARK: - Actions
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/*!
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Keyboard will show notification listener
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- parameter notification: NSNotification
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*/
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@objc fileprivate func keyboardWillShow(_ notification: Notification) {
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guard isTopAndVisible else { return }
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keyboardShown = true
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centerPopup()
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}
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/*!
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Keyboard will hide notification listener
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- parameter notification: NSNotification
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*/
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@objc fileprivate func keyboardWillHide(_ notification: Notification) {
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guard isTopAndVisible else { return }
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keyboardShown = false
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centerPopup()
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}
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/*!
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Keyboard will change frame notification listener
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- parameter notification: NSNotification
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*/
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@objc fileprivate func keyboardWillChangeFrame(_ notification: Notification) {
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guard let keyboardRect = (notification as NSNotification).userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else {
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return
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}
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keyboardHeight = keyboardRect.cgRectValue.height
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}
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/*!
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Listen to orientation changes
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- parameter notification: NSNotification
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*/
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@objc fileprivate func orientationChanged(_ notification: Notification) {
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if keyboardShown { centerPopup() }
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}
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fileprivate func centerPopup() {
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// Make sure keyboard should reposition on keayboard notifications
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guard keyboardShiftsView else { return }
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// Make sure a valid keyboard height is available
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guard let keyboardHeight = keyboardHeight else { return }
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// Calculate new center of shadow background
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let popupCenter = keyboardShown ? keyboardHeight / -2 : 0
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// Reposition and animate
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popupContainerView.centerYConstraint?.constant = popupCenter
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popupContainerView.pv_layoutIfNeededAnimated()
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}
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}
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