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This commit is contained in:
Pfeil, Scott Robert 2021-02-11 17:18:06 -05:00
parent d333e449fe
commit c2f1cd200d
11 changed files with 200 additions and 118 deletions
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12
MVMCoreUI.xcodeproj/project.pbxproj
View File

@ -347,6 +347,8 @@
D23EA800247EBD6C00D60C34 /* LabelBarButtonItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = D23EA7FF247EBD6C00D60C34 /* LabelBarButtonItem.swift */; };
D23EA802247EBED400D60C34 /* ImageBarButtonItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = D23EA801247EBED400D60C34 /* ImageBarButtonItem.swift */; };
D243859923A16B1800332775 /* Container.swift in Sources */ = {isa = PBXBuildFile; fileRef = D243859823A16B1800332775 /* Container.swift */; };
D24918F625D5AD8E00CAB4B1 /* PageVisibilityClosureBehavior.swift in Sources */ = {isa = PBXBuildFile; fileRef = D24918F525D5AD8E00CAB4B1 /* PageVisibilityClosureBehavior.swift */; };
D24918FA25D5ADBB00CAB4B1 /* PageScrolledClosureBehavior.swift in Sources */ = {isa = PBXBuildFile; fileRef = D24918F925D5ADBA00CAB4B1 /* PageScrolledClosureBehavior.swift */; };
D2509ED12472ED9B001BFB9D /* NavigationItemModelProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = D2509ED02472ED9B001BFB9D /* NavigationItemModelProtocol.swift */; };
D2509ED62472EE2F001BFB9D /* NavigationImageButtonModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = D2509ED52472EE2F001BFB9D /* NavigationImageButtonModel.swift */; };
D253BB8A24574CC5002DE544 /* StackModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = D260106423D0CEA700764D80 /* StackModel.swift */; };
@ -408,7 +410,6 @@
D29C559025C095210082E7D6 /* Video.swift in Sources */ = {isa = PBXBuildFile; fileRef = D29C558F25C095210082E7D6 /* Video.swift */; };
D29C559325C0992D0082E7D6 /* VideoModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = D29C559225C0992D0082E7D6 /* VideoModel.swift */; };
D29C559625C099630082E7D6 /* VideoDataManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = D29C559525C099630082E7D6 /* VideoDataManager.swift */; };
D29C559C25C20D6D0082E7D6 /* VideoPauseBehavior.swift in Sources */ = {isa = PBXBuildFile; fileRef = D29C559B25C20D6D0082E7D6 /* VideoPauseBehavior.swift */; };
D29C94D5242901C9003813BA /* MVMCoreUICommonViewsUtility+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = D29C94D4242901C9003813BA /* MVMCoreUICommonViewsUtility+Extension.swift */; };
D29DF0D121E404D4003B2FB9 /* MVMCoreUI.h in Headers */ = {isa = PBXBuildFile; fileRef = D29DF0CF21E404D4003B2FB9 /* MVMCoreUI.h */; settings = {ATTRIBUTES = (Public, ); }; };
D29DF0E621E4F3C7003B2FB9 /* MVMCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D29DF0E521E4F3C7003B2FB9 /* MVMCore.framework */; };
@ -898,6 +899,8 @@
D23EA7FF247EBD6C00D60C34 /* LabelBarButtonItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LabelBarButtonItem.swift; sourceTree = "<group>"; };
D23EA801247EBED400D60C34 /* ImageBarButtonItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ImageBarButtonItem.swift; sourceTree = "<group>"; };
D243859823A16B1800332775 /* Container.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Container.swift; sourceTree = "<group>"; };
D24918F525D5AD8E00CAB4B1 /* PageVisibilityClosureBehavior.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PageVisibilityClosureBehavior.swift; sourceTree = "<group>"; };
D24918F925D5ADBA00CAB4B1 /* PageScrolledClosureBehavior.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PageScrolledClosureBehavior.swift; sourceTree = "<group>"; };
D2509ED02472ED9B001BFB9D /* NavigationItemModelProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NavigationItemModelProtocol.swift; sourceTree = "<group>"; };
D2509ED52472EE2F001BFB9D /* NavigationImageButtonModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NavigationImageButtonModel.swift; sourceTree = "<group>"; };
D253BB9B245874F8002DE544 /* BGImageMolecule.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BGImageMolecule.swift; sourceTree = "<group>"; };
@ -957,7 +960,6 @@
D29C558F25C095210082E7D6 /* Video.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Video.swift; sourceTree = "<group>"; };
D29C559225C0992D0082E7D6 /* VideoModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoModel.swift; sourceTree = "<group>"; };
D29C559525C099630082E7D6 /* VideoDataManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoDataManager.swift; sourceTree = "<group>"; };
D29C559B25C20D6D0082E7D6 /* VideoPauseBehavior.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoPauseBehavior.swift; sourceTree = "<group>"; };
D29C94D4242901C9003813BA /* MVMCoreUICommonViewsUtility+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "MVMCoreUICommonViewsUtility+Extension.swift"; sourceTree = "<group>"; };
D29DF0CC21E404D4003B2FB9 /* MVMCoreUI.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = MVMCoreUI.framework; sourceTree = BUILT_PRODUCTS_DIR; };
D29DF0CF21E404D4003B2FB9 /* MVMCoreUI.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MVMCoreUI.h; sourceTree = "<group>"; };
@ -1240,6 +1242,8 @@
children = (
27F973522466074500CAB5C5 /* PageBehavior.swift */,
27F97369246750BE00CAB5C5 /* ScreenBrightnessModifierBehavior.swift */,
D24918F525D5AD8E00CAB4B1 /* PageVisibilityClosureBehavior.swift */,
D24918F925D5ADBA00CAB4B1 /* PageScrolledClosureBehavior.swift */,
);
path = Behaviors;
sourceTree = "<group>";
@ -2038,7 +2042,6 @@
AA07EA902510A442009A2AE3 /* StarModel.swift */,
AA07EA922510A451009A2AE3 /* Star.swift */,
D29C559525C099630082E7D6 /* VideoDataManager.swift */,
D29C559B25C20D6D0082E7D6 /* VideoPauseBehavior.swift */,
D29C559225C0992D0082E7D6 /* VideoModel.swift */,
D29C558F25C095210082E7D6 /* Video.swift */,
);
@ -2672,7 +2675,6 @@
0A7EF85D23D8A95600B2AAD1 /* TextEntryFieldModel.swift in Sources */,
BB54C5212434D92F0038326C /* ListRightVariableButtonAllTextAndLinksModel.swift in Sources */,
D2092349244A51D40044AD09 /* RadioSwatchModel.swift in Sources */,
D29C559C25C20D6D0082E7D6 /* VideoPauseBehavior.swift in Sources */,
0A775F2824893937009EFB58 /* ThreeHeadlineBodyLinkModel.swift in Sources */,
8DD1E370243B3D0500D8F2DF /* ListThreeColumnInternationalData.swift in Sources */,
D2EC7BDD2527B83700F540AF /* SectionHeaderFooterView.swift in Sources */,
@ -2707,6 +2709,7 @@
94C2D9A523872C350006CF46 /* LabelAttributeFontModel.swift in Sources */,
011D958724042492000E3791 /* FormFieldProtocol.swift in Sources */,
011D95AF2407266E000E3791 /* RadioButtonModel.swift in Sources */,
D24918F625D5AD8E00CAB4B1 /* PageVisibilityClosureBehavior.swift in Sources */,
D20492A624329CE200A5EED6 /* LoadImageView.swift in Sources */,
017BEB7F23676E870024EF95 /* MoleculeObjectMapping.swift in Sources */,
D274CA332236A78900B01B62 /* FooterView.swift in Sources */,
@ -2792,6 +2795,7 @@
012A88DB238ED45900FE3DA1 /* CarouselModel.swift in Sources */,
D2092355244FA0FD0044AD09 /* ThreeLayerTemplateModelProtocol.swift in Sources */,
0AE14F64238315D2005417F8 /* TextField.swift in Sources */,
D24918FA25D5ADBB00CAB4B1 /* PageScrolledClosureBehavior.swift in Sources */,
0A51F3E22475CB73002E08B6 /* LoadingSpinnerModel.swift in Sources */,
D2169303251E53D9002A6324 /* SectionListTemplateModel.swift in Sources */,
0AB764D124460F6300E7FE72 /* UIDatePicker+Extension.swift in Sources */,

13
MVMCoreUI/Atomic/Atoms/Views/Video.swift
View File

@ -10,13 +10,8 @@ import AVKit
open class Video: View {
public let videoViewController = AVPlayerViewController()
// TODO: reuse.
private let videoQueue = DispatchQueue(label: "serial.video.queue")
/// Used to track the state and respond..
private var stateKVOToken: NSKeyValueObservation?
private var visible = true
open override func setupView() {
super.setupView()
@ -29,6 +24,10 @@ open class Video: View {
open override func set(with model: MoleculeModelProtocol, _ delegateObject: MVMCoreUIDelegateObject?, _ additionalData: [AnyHashable: Any]?) {
super.set(with: model, delegateObject, additionalData)
guard let model = model as? VideoModel else { return }
if let controller = delegateObject?.moleculeDelegate as? UIViewController {
controller.addChild(videoViewController)
videoViewController.didMove(toParent: controller)
}
videoViewController.showsPlaybackControls = model.showControls
videoViewController.player = model.videoDataManager.player
addStateObserver()
@ -50,8 +49,8 @@ open class Video: View {
}
// Handle pause behavior
model.addVisibleBehavoir(for: self, delegateObject: delegateObject)
model.addScrollBehavoir(for: self, delegateObject: delegateObject)
model.addVisibleBehavior(for: self, delegateObject: delegateObject)
model.addScrollBehavior(for: self, delegateObject: delegateObject)
}
/// Listens and responds to video loading state changes.

4
MVMCoreUI/Atomic/Atoms/Views/VideoDataManager.swift
View File

@ -7,9 +7,11 @@
//
import Foundation
import AVFoundation
@objcMembers open class VideoDataManager: NSObject {
/// The state of the video.
@objc public enum State: Int {
case none
case loading
@ -22,7 +24,7 @@ import Foundation
// Thread Safe video state handling.
private var _videoState = State.none
private let videoStatueQueue = DispatchQueue(label: "concurrent.video.state.queue", attributes: .concurrent)
private let videoStatueQueue = DispatchQueue(label: "com.vzw.mvmcoreui.videoDataManager.state", attributes: .concurrent)
/// The state of the video. Use KVO to listen for state changes.
@objc public var videoState: State {

72
MVMCoreUI/Atomic/Atoms/Views/VideoModel.swift
View File

@ -15,12 +15,15 @@ open class VideoModel: MoleculeModelProtocol {
public var showControls = false
public var autoPlay = true
public var alwaysReset = false
/// When the video is halted because it is no longer visible
private var halted = false
/// Keeps a reference to the video data.
public var videoDataManager: VideoDataManager
private weak var visibleBehavior: BlockPageVisibilityBehavior?
private weak var scrollBehavior: BlockPageScrolledBehavior?
private weak var visibleBehavior: PageVisibilityClosureBehavior?
private weak var scrollBehavior: PageScrolledClosureBehavior?
private enum CodingKeys: String, CodingKey {
case moleculeName
@ -59,22 +62,38 @@ open class VideoModel: MoleculeModelProtocol {
try container.encode(alwaysReset, forKey: .alwaysReset)
}
// Temporary
func isVisible(view: UIView) -> Bool {
return true
private func haltVideo() {
guard !halted else { return }
halted = true
print("halted \(video)")
videoDataManager.player?.pause()
}
/// Adds a behavoir to pause the video on page hidden behavoir and unpause if necessary on page shown.
open func addVisibleBehavoir(for view: Video, delegateObject: MVMCoreUIDelegateObject?) {
private func unhaltVideo() {
guard halted else { return }
halted = false
print("unhalted \(video)")
guard videoDataManager.videoState == .loaded else { return }
if alwaysReset {
// Always start video at the beginning.
videoDataManager.player?.seek(to: .zero)
}
if autoPlay {
videoDataManager.player?.play()
}
}
/// Adds a behavior to pause the video on page hidden behavior and unpause if necessary on page shown.
open func addVisibleBehavior(for view: Video, delegateObject: MVMCoreUIDelegateObject?) {
let onShow = { [weak self] in
guard let self = self,
self.isVisible(view: view),
self.autoPlay else { return }
self.videoDataManager.player?.play()
let containingView = (delegateObject?.moleculeDelegate as? UIViewController)?.view,
MVMCoreUIUtility.isView(view, visibleIn: containingView) else { return }
self.unhaltVideo()
}
let onHide: () -> Void = { [weak self] in
guard let self = self else { return }
self.videoDataManager.player?.pause()
self.haltVideo()
}
guard visibleBehavior == nil else {
@ -83,25 +102,24 @@ open class VideoModel: MoleculeModelProtocol {
return
}
guard let delegate = delegateObject?.moleculeDelegate,
let page = delegate as? PageProtocol,
var pageModel = page.pageModel as? PageBehaviorsTemplateProtocol else { return }
let pauseBehavior = BlockPageVisibilityBehavior(with: onShow, onPageHiddenHandler: onHide)
pageModel.add(behavior: pauseBehavior)
guard var delegate = delegateObject?.behaviorTemplateDelegate else { return }
let pauseBehavior = PageVisibilityClosureBehavior(with: onShow, onPageHiddenHandler: onHide)
delegate.add(behavior: pauseBehavior)
self.visibleBehavior = pauseBehavior
}
/// Adds a behavoir to pause the video if scrolled off of the page and unpause if necessary if scrolled on.
open func addScrollBehavoir(for view: Video, delegateObject: MVMCoreUIDelegateObject?) {
/// Adds a behavior to pause the video if scrolled off of the page and unpause if necessary if scrolled on.
open func addScrollBehavior(for view: Video, delegateObject: MVMCoreUIDelegateObject?) {
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 else { return }
if !self.isVisible(view: view) {
self.videoDataManager.player?.pause()
} else if self.autoPlay {
self.videoDataManager.player?.play()
guard let self = self,
let containingView = (delegateObject?.moleculeDelegate as? UIViewController)?.view else { return }
if !MVMCoreUIUtility.isView(view, visibleIn: containingView) {
self.haltVideo()
} else {
self.unhaltVideo()
}
}
@ -110,11 +128,9 @@ open class VideoModel: MoleculeModelProtocol {
return
}
guard let delegate = delegateObject?.moleculeDelegate,
let page = delegate as? PageProtocol,
var pageModel = page.pageModel as? PageBehaviorsTemplateProtocol else { return }
let scrollBehavior = BlockPageScrolledBehavior(with: onScroll)
pageModel.add(behavior: scrollBehavior)
guard var delegate = delegateObject?.behaviorTemplateDelegate else { return }
let scrollBehavior = PageScrolledClosureBehavior(with: onScroll)
delegate.add(behavior: scrollBehavior)
self.scrollBehavior = scrollBehavior
}
}

75
MVMCoreUI/Atomic/Atoms/Views/VideoPauseBehavior.swift
View File

@ -1,75 +0,0 @@
//
// VideoPauseBehavior.swift
// MVMCoreUI
//
// Created by Scott Pfeil on 1/27/21.
// Copyright © 2021 Verizon Wireless. All rights reserved.
//
import Foundation
public class BlockPageVisibilityBehavior: PageVisibilityBehavior {
public static var identifier = "blockPageVisibilityBehavior"
public var pageShownHandler: () -> Void
public var pageHiddenHandler: () -> Void
public init(with onPageShownHandler: @escaping () -> Void, onPageHiddenHandler: @escaping () -> Void) {
self.pageShownHandler = onPageShownHandler
self.pageHiddenHandler = onPageHiddenHandler
}
private enum CodingKeys: String, CodingKey {
case behaviorName
}
// This class is not meant to be decoded and encoded really.
public required init(from decoder: Decoder) throws {
pageShownHandler = {}
pageHiddenHandler = {}
}
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(behaviorName, forKey: .behaviorName)
}
//MARK:- PageVisibilityBehavior
public func onPageShown() {
pageShownHandler()
}
public func onPageHidden() {
pageHiddenHandler()
}
}
public class BlockPageScrolledBehavior: PageScrolledBehavior {
public static var identifier = "blockPageScrolledBehavior"
public var pageScrolledHandler: (_ scrollView: UIScrollView) -> Void
public init(with onPageScrolledHandler: @escaping (_ scrollView: UIScrollView) -> Void) {
self.pageScrolledHandler = onPageScrolledHandler
}
private enum CodingKeys: String, CodingKey {
case behaviorName
}
// This class is not meant to be decoded and encoded really.
public required init(from decoder: Decoder) throws {
pageScrolledHandler = { (scrollView) in }
}
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(behaviorName, forKey: .behaviorName)
}
public func pageScrolled(scrollView: UIScrollView) {
pageScrolledHandler(scrollView)
}
}

14
MVMCoreUI/Behaviors/PageBehavior.swift
View File

@ -48,8 +48,16 @@ public protocol PageBehaviorsTemplateProtocol {
public extension PageBehaviorsTemplateProtocol {
mutating func add(behavior: PageBehaviorProtocol) {
var behavoirs = behaviors ?? []
behavoirs.append(behavior)
self.behaviors = behavoirs
var newBehaviors = behaviors ?? []
newBehaviors.append(behavior)
self.behaviors = newBehaviors
}
}
public extension MVMCoreUIDelegateObject {
weak var behaviorTemplateDelegate: (PageBehaviorsTemplateProtocol & NSObjectProtocol)? {
get {
return (moleculeDelegate as? PageProtocol)?.pageModel as? (PageBehaviorsTemplateProtocol & NSObjectProtocol)
}
}
}

33
MVMCoreUI/Behaviors/PageScrolledClosureBehavior.swift Normal file
View File

@ -0,0 +1,33 @@
//
// PageScrolledClosureBehavior.swift
// MVMCoreUI
//
// Created by Scott Pfeil on 2/11/21.
// Copyright © 2021 Verizon Wireless. All rights reserved.
//
import Foundation
public class PageScrolledClosureBehavior: PageScrolledBehavior {
public static var identifier = "pageScrolledClosureBehavior"
public var pageScrolledHandler: (_ scrollView: UIScrollView) -> Void
public init(with onPageScrolledHandler: @escaping (_ scrollView: UIScrollView) -> Void) {
self.pageScrolledHandler = onPageScrolledHandler
}
// This class is not meant to be decoded and encoded really.
public required init(from decoder: Decoder) throws {
throw ModelRegistry.Error.decoderOther(message: "PageScrolledClosureBehavior does not decode.")
}
public func encode(to encoder: Encoder) throws {
throw ModelRegistry.Error.decoderOther(message: "PageScrolledClosureBehavior does not encode.")
}
public func pageScrolled(scrollView: UIScrollView) {
pageScrolledHandler(scrollView)
}
}

40
MVMCoreUI/Behaviors/PageVisibilityClosureBehavior.swift Normal file
View File

@ -0,0 +1,40 @@
//
// PageVisibilityClosureBehavior.swift
// MVMCoreUI
//
// Created by Scott Pfeil on 2/11/21.
// Copyright © 2021 Verizon Wireless. All rights reserved.
//
import Foundation
public class PageVisibilityClosureBehavior: PageVisibilityBehavior {
public static var identifier = "pageVisibilityClosureBehavior"
public var pageShownHandler: () -> Void
public var pageHiddenHandler: () -> Void
public init(with onPageShownHandler: @escaping () -> Void, onPageHiddenHandler: @escaping () -> Void) {
self.pageShownHandler = onPageShownHandler
self.pageHiddenHandler = onPageHiddenHandler
}
// This class is not meant to be decoded and encoded really.
public required init(from decoder: Decoder) throws {
throw ModelRegistry.Error.decoderOther(message: "PageVisibilityClosureBehavior does not decode.")
}
public func encode(to encoder: Encoder) throws {
throw ModelRegistry.Error.decoderOther(message: "PageVisibilityClosureBehavior does not encode.")
}
//MARK:- PageVisibilityBehavior
public func onPageShown() {
pageShownHandler()
}
public func onPageHidden() {
pageHiddenHandler()
}
}

2
MVMCoreUI/OtherHandlers/CoreUIObject.swift
View File

@ -13,6 +13,7 @@ import UIKit
public var globalTopAlertDelegate: MVMCoreGlobalTopAlertDelegateProtocol?
open override func defaultInitialSetup() {
loadHandler = MVMCoreLoadHandler()
cache = MVMCoreCache()
sessionHandler = MVMCoreSessionTimeHandler()
actionHandler = MVMCoreActionHandler()
@ -21,5 +22,6 @@ import UIKit
loggingDelegate = MVMCoreUILoggingHandler()
moleculeMap = MoleculeObjectMapping()
MoleculeObjectMapping.registerObjects()
clientParameterRegistry = ClientParameterRegistry()
}
}

8
MVMCoreUI/Utility/MVMCoreUIUtility.h
View File

@ -37,6 +37,14 @@ NS_ASSUME_NONNULL_BEGIN
/// Checks if the view or any descendents of the view is currently focused for voice over.
+ (BOOL)viewContainsAccessiblityFocus:(nonnull UIView *)view;
+ (BOOL)isView:(nonnull UIView *)view visibleIn:(nonnull UIView *)rootView;
+ (BOOL)isViewVisibleInParent:(nonnull UIView *)view;
+ (BOOL)doesView:(nonnull UIView *)overlappingView cover:(nonnull UIView *)view;
+ (BOOL)isViewTransparent:(nonnull UIView *)view;
#pragma mark - Setters
+ (void)setMarginsForView:(nullable UIView *)view leading:(CGFloat)leading top:(CGFloat)top trailing:(CGFloat)trailing bottom:(CGFloat)bottom;

45
MVMCoreUI/Utility/MVMCoreUIUtility.m
View File

@ -96,6 +96,51 @@
return containsFocus;
}
+ (BOOL)isView:(nonnull UIView *)view visibleIn:(nonnull UIView *)rootView {
return [view isDescendantOfView:rootView] && [self isViewVisibleInParent:view];
}
// Climb up the tree. Break early.
+ (BOOL)isViewVisibleInParent:(nonnull UIView *)view {
UIView *superview = view.superview;
UIView *ancestor = view;
// Begin climbing its ancestor views, checking if it remains visible in *each* of their bounds and if the children at views closer to the front block the visibility of this view.
while (superview) {
if (superview.clipsToBounds && !CGRectIntersectsRect(superview.bounds, [view convertRect:view.bounds toView:superview])) {
return false;
} else {
// Check the superview's children up to the common ancestor. (Reworking the ancestor would put us in an infinite loop and we want to ignore the children with a lower z-order.)
for (UIView *subview in [superview.subviews reverseObjectEnumerator]) {
if (subview == ancestor) {
break;
} else if ([self doesView:subview cover:view]) {
return false;
}
}
}
ancestor = superview;
superview = superview.superview;
}
return true;
}
// Climb down the tree.
+ (BOOL)doesView:(nonnull UIView *)overlappingView cover:(nonnull UIView *)view {
if (![self isViewTransparent:overlappingView] && CGRectContainsRect(overlappingView.bounds, [view convertRect:view.bounds toView:overlappingView])) {
return true;
}
for (UIView *subview in overlappingView.subviews) {
if ([self doesView:subview cover:view]) {
return true;
}
}
return false;
}
+ (BOOL)isViewTransparent:(nonnull UIView *)view {
return view.alpha < 1 || view.backgroundColor == nil || CGColorGetAlpha(view.backgroundColor.CGColor) < 1;
}
#pragma mark - Setters
+ (void)setMarginsForView:(nullable UIView *)view leading:(CGFloat)leading top:(CGFloat)top trailing:(CGFloat)trailing bottom:(CGFloat)bottom {