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https://github.com/vector-im/element-ios.git
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f4abcb2e22
- Added coach message view
112 lines
4.1 KiB
Swift
112 lines
4.1 KiB
Swift
//
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// Copyright 2021 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import UIKit
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/// `WindowOverlayPresenter` allows to add a given view to the presenting view or window.
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/// The presenter also manages taps over the presenting view and the duration to dismiss the view.
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class WindowOverlayPresenter: NSObject {
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// MARK: Private
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private weak var presentingView: UIView?
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private weak var presentedView: UIView?
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private weak var gestureRecognizer: UIGestureRecognizer?
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private var timer: Timer?
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// MARK: Public
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/// Add a given view to the presenting view or window.
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/// The presenter also manages taps over the presenting view and the duration to dismiss the view.
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///
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/// - parameters:
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/// - view: instance of the view that will be displayed
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/// - presentingView: instance of the presenting view. `nil` will display the view over the key window
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/// - duration:if duration is not `nil`, the view will be dismissed after the given duration. The view is never dismissed otherwise
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func show(_ view: UIView, over presentingView: UIView? = nil, duration: TimeInterval? = nil) {
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guard presentedView == nil else {
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return
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}
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let keyWindow: UIWindow? = UIApplication.shared.windows.filter {$0.isKeyWindow}.first
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guard let backView = presentingView ?? keyWindow else {
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MXLog.error("[WindowOverlay] show: no eligible presenting view found")
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return
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}
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view.alpha = 0
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backView.addSubview(view)
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let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.didTapOnBackView(sender:)))
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tapGestureRecognizer.cancelsTouchesInView = false
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backView.addGestureRecognizer(tapGestureRecognizer)
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self.gestureRecognizer = tapGestureRecognizer
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self.presentingView = backView
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self.presentedView = view
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UIView.animate(withDuration: 0.3) {
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view.alpha = 1
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}
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if let timeout = duration {
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timer = Timer.scheduledTimer(withTimeInterval: timeout, repeats: false, block: { [weak self] timer in
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self?.dismiss()
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})
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}
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}
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/// Dismisses the currently presented view.
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func dismiss() {
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if let gestureRecognizer = self.gestureRecognizer {
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self.presentingView?.removeGestureRecognizer(gestureRecognizer)
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}
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self.timer?.invalidate()
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self.timer = nil
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UIView.animate(withDuration: 0.3) {
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self.presentedView?.alpha = 0
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} completion: { isFinished in
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if isFinished {
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self.presentedView?.removeFromSuperview()
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self.presentingView = nil
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}
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}
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}
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// MARK: Private
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@objc private func didTapOnBackView(sender: UIGestureRecognizer) {
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dismiss()
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}
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}
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// MARK: Objective-C
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extension WindowOverlayPresenter {
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/// Add a given view to the presenting view or window.
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/// The presenter also manages taps over the presenting view and the duration to dismiss the view.
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///
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/// - parameters:
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/// - view: instance of the view that will be displayed
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/// - presentingView: instance of the presenting view. `nil` will display the view over the key window
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/// - duration:if duration > 0, the view will be dismissed after the given duration. The view is never dismissed otherwise
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@objc func show(_ view: UIView, over presentingView: UIView?, duration: TimeInterval) {
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self.show(view, over: presentingView, duration: duration > 0 ? duration : nil)
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}
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}
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