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Active listener

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This commit is contained in:
Pfeil, Scott Robert 2021-02-11 20:31:17 -05:00
parent 744398b7b8
commit 0793498e3f
2 changed files with 34 additions and 3 deletions
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1
MVMCoreUI/Atomic/Atoms/Views/Video.swift
View File

@ -51,6 +51,7 @@ open class Video: View {
// Handle pause behavior
model.addVisibleBehavior(for: self, delegateObject: delegateObject)
model.addScrollBehavior(for: self, delegateObject: delegateObject)
model.addActiveListener(for: self, delegateObject: delegateObject)
}
/// Listens and responds to video loading state changes.

36
MVMCoreUI/Atomic/Atoms/Views/VideoModel.swift
View File

@ -24,6 +24,8 @@ open class VideoModel: MoleculeModelProtocol {
private weak var visibleBehavior: PageVisibilityClosureBehavior?
private weak var scrollBehavior: PageScrolledClosureBehavior?
private var activeListener: Any?
private var resignActiveListener: Any?
private enum CodingKeys: String, CodingKey {
case moleculeName
@ -113,9 +115,8 @@ open class VideoModel: MoleculeModelProtocol {
let onScroll = { [weak self] (scrollView: UIScrollView) in
// If visible to not visible, pause video.
// If not visible to visible, unpause if needed, add visible behavior
guard let self = self,
let containingView = (delegateObject?.moleculeDelegate as? UIViewController)?.view else { return }
if !MVMCoreUIUtility.isView(view, visibleIn: containingView) {
guard let self = self else { return }
if !MVMCoreUIUtility.isView(view, visibleIn: scrollView) {
self.haltVideo()
} else {
self.unhaltVideo()
@ -132,4 +133,33 @@ open class VideoModel: MoleculeModelProtocol {
delegate.add(behavior: scrollBehavior)
self.scrollBehavior = scrollBehavior
}
open func addActiveListener(for view: Video, delegateObject: MVMCoreUIDelegateObject?) {
removeActiveListener()
guard let containingView = (delegateObject?.moleculeDelegate as? UIViewController)?.view else { return }
resignActiveListener = NotificationCenter.default.addObserver(forName: UIApplication.willResignActiveNotification, object: nil, queue: OperationQueue.main) { [weak self] (notification) in
self?.haltVideo()
}
activeListener = NotificationCenter.default.addObserver(forName: UIApplication.didBecomeActiveNotification, object: nil, queue: OperationQueue.main) { [weak self] (notification) in
if MVMCoreUIUtility.isView(view, visibleIn: containingView) {
self?.unhaltVideo()
}
}
}
private func removeActiveListener() {
if let observer = activeListener {
NotificationCenter.default.removeObserver(observer)
activeListener = nil
}
if let observer = resignActiveListener {
NotificationCenter.default.removeObserver(observer)
resignActiveListener = nil
}
}
deinit {
removeActiveListener()
}
}