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Merge pull request #19 from Orderella/development
Automatic dialog repositioning
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| // | ||
| // PopupDialog+Keyboard.swift | ||
| // | ||
| // Copyright (c) 2016 Orderella Ltd. (http://orderella.co.uk) | ||
| // Author - Martin Wildfeuer (http://www.mwfire.de) | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
| // | ||
|
|
||
| import Foundation | ||
| import UIKit | ||
|
|
||
| /// This extension is designed to handle dialog positioning | ||
| /// if a keyboard is displayed while the popup is on top | ||
| internal extension PopupDialog { | ||
|
|
||
| // MARK: - Keyboard & orientation observers | ||
|
|
||
| /*! Add obserservers for UIKeyboard notifications */ | ||
| internal func addObservers() { | ||
| NSNotificationCenter.defaultCenter().addObserver(self, | ||
| selector: #selector(orientationChanged), | ||
| name: UIDeviceOrientationDidChangeNotification, | ||
| object: nil) | ||
|
|
||
| NSNotificationCenter.defaultCenter().addObserver(self, | ||
| selector: #selector(keyboardWillShow), | ||
| name: UIKeyboardWillShowNotification, | ||
| object: nil) | ||
|
|
||
| NSNotificationCenter.defaultCenter().addObserver(self, | ||
| selector: #selector(keyboardWillHide), | ||
| name: UIKeyboardWillHideNotification, | ||
| object: nil) | ||
|
|
||
| NSNotificationCenter.defaultCenter().addObserver(self, | ||
| selector: #selector(keyboardWillChangeFrame), | ||
| name: UIKeyboardWillChangeFrameNotification, | ||
| object: nil) | ||
| } | ||
|
|
||
| /*! Remove observers */ | ||
| internal func removeObservers() { | ||
| NSNotificationCenter.defaultCenter().removeObserver(self, | ||
| name: UIDeviceOrientationDidChangeNotification, | ||
| object: nil) | ||
|
|
||
| NSNotificationCenter.defaultCenter().removeObserver(self, | ||
| name: UIKeyboardWillShowNotification, | ||
| object: nil) | ||
|
|
||
| NSNotificationCenter.defaultCenter().removeObserver(self, | ||
| name: UIKeyboardWillHideNotification, | ||
| object: nil) | ||
|
|
||
| NSNotificationCenter.defaultCenter().removeObserver(self, | ||
| name: UIKeyboardWillChangeFrameNotification, | ||
| object: nil) | ||
| } | ||
|
|
||
| // MARK: - Actions | ||
|
|
||
| /*! | ||
| Keyboard will show notification listener | ||
| - parameter notification: NSNotification | ||
| */ | ||
| @objc private func keyboardWillShow(notification: NSNotification) { | ||
| guard isTopAndVisible else { return } | ||
| keyboardShown = true | ||
| centerPopup() | ||
| } | ||
|
|
||
| /*! | ||
| Keyboard will hide notification listener | ||
| - parameter notification: NSNotification | ||
| */ | ||
| @objc private func keyboardWillHide(notification: NSNotification) { | ||
| guard isTopAndVisible else { return } | ||
| keyboardShown = false | ||
| centerPopup() | ||
| } | ||
|
|
||
| /*! | ||
| Keyboard will change frame notification listener | ||
| - parameter notification: NSNotification | ||
| */ | ||
| @objc private func keyboardWillChangeFrame(notification: NSNotification) { | ||
| guard let keyboardRect = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else { | ||
| return | ||
| } | ||
| keyboardHeight = keyboardRect.CGRectValue().height | ||
| } | ||
|
|
||
| /*! | ||
| Listen to orientation changes | ||
| - parameter notification: NSNotification | ||
| */ | ||
| @objc private func orientationChanged(notification: NSNotification) { | ||
| if keyboardShown { centerPopup() } | ||
| } | ||
|
|
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| private func centerPopup() { | ||
|
|
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| // Make sure keyboard should reposition on keayboard notifications | ||
| guard keyboardShiftsView else { return } | ||
|
|
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| // Make sure a valid keyboard height is available | ||
| guard let keyboardHeight = keyboardHeight else { return } | ||
|
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| // Calculate new center of shadow background | ||
| let popupCenter = keyboardShown ? keyboardHeight / -2 : 0 | ||
|
|
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| // Reposition and animate | ||
| popupContainerView.centerYConstraint?.constant = popupCenter | ||
| popupContainerView.pv_layoutIfNeededAnimated() | ||
| } | ||
| } |
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