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Merge pull request #107 from kazuhiro4949/hotfix/appearance_call
Update for lifecycle when rotating
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| // | ||
| // ContentAppearanceHandler.swift | ||
| // PagingKit | ||
| // | ||
| // Created by kahayash on 2019/12/19. | ||
| // Copyright © 2019 Kazuhiro Hayashi. All rights reserved. | ||
| // | ||
|
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| import Foundation | ||
|
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| protocol ContentsAppearanceHandlerProtocol { | ||
| var contentsDequeueHandler: (() -> [UIViewController?]?)? { get set } | ||
| func beginDragging(at index: Int) | ||
| func stopScrolling(at index: Int) | ||
| func callApparance(_ apperance: ContentsAppearanceHandler.Apperance, animated: Bool, at index: Int) | ||
| func preReload(at index: Int) | ||
| func postReload(at index: Int) | ||
| } | ||
|
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| class ContentsAppearanceHandler: ContentsAppearanceHandlerProtocol { | ||
| enum Apperance { | ||
| case viewDidAppear | ||
| case viewWillAppear | ||
| case viewDidDisappear | ||
| case viewWillDisappear | ||
| } | ||
|
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| private var dissapearingIndex: Int? | ||
| var contentsDequeueHandler: (() -> [UIViewController?]?)? | ||
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| func beginDragging(at index: Int) { | ||
| guard let vcs = contentsDequeueHandler?(), index < vcs.endIndex, let vc = vcs[index] else { | ||
| return | ||
| } | ||
|
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| if let dissapearingIndex = dissapearingIndex, dissapearingIndex < vcs.endIndex, let prevVc = vcs[dissapearingIndex] { | ||
| prevVc.endAppearanceTransition() | ||
| } | ||
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| vc.beginAppearanceTransition(false, animated: false) | ||
| dissapearingIndex = index | ||
| } | ||
|
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| func stopScrolling(at index: Int) { | ||
| guard let vcs = contentsDequeueHandler?(), index < vcs.endIndex, let vc = vcs[index] else { | ||
| return | ||
| } | ||
|
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| if let dissapearingIndex = dissapearingIndex, dissapearingIndex < vcs.endIndex, let prevVc = vcs[dissapearingIndex] { | ||
| prevVc.endAppearanceTransition() | ||
| } | ||
|
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| vc.beginAppearanceTransition(true, animated: false) | ||
| vc.endAppearanceTransition() | ||
| dissapearingIndex = nil | ||
| } | ||
|
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| func callApparance(_ apperance: Apperance, animated: Bool, at index: Int) { | ||
| guard let vcs = contentsDequeueHandler?(), index < vcs.endIndex, let vc = vcs[index] else { | ||
| return | ||
| } | ||
|
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| if let dissapearingIndex = dissapearingIndex, | ||
| dissapearingIndex < vcs.endIndex, | ||
| let prevVc = vcs[dissapearingIndex], | ||
| dissapearingIndex == index { | ||
|
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| prevVc.endAppearanceTransition() | ||
| } | ||
| dissapearingIndex = nil | ||
|
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| switch apperance { | ||
| case .viewDidAppear, .viewDidDisappear: | ||
| vc.endAppearanceTransition() | ||
| case .viewWillAppear: | ||
| vc.beginAppearanceTransition(true, animated: animated) | ||
| case .viewWillDisappear: | ||
| vc.beginAppearanceTransition(false, animated: animated) | ||
| } | ||
| } | ||
|
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| func preReload(at index: Int) { | ||
| guard let vcs = contentsDequeueHandler?(), index < vcs.endIndex, let vc = vcs[index] else { | ||
| return | ||
| } | ||
|
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| vc.beginAppearanceTransition(false, animated: false) | ||
| vc.endAppearanceTransition() | ||
|
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| } | ||
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| func postReload(at index: Int) { | ||
| guard let vcs = contentsDequeueHandler?(), index < vcs.endIndex, let vc = vcs[index] else { | ||
| return | ||
| } | ||
|
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| vc.beginAppearanceTransition(true, animated: false) | ||
| vc.endAppearanceTransition() | ||
|
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| } | ||
| } | ||
|
|
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