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4XJGU$PODVSSFODZΛར༻
ͨ͠6*7JFX$POUSPMMFSදࣔ
ͷഉଞ੍ޚͷ࣮
J045FDI5BMLʲΈͯͶY.JSSBUJWʳ
!UPJLJ
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ࣗݾհ
!UPJLJ
UPJLJ
5PTIJLJ5BLF[BXB
w .JSSBUJW
*OD
w αφʔ🧖
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࣍
w BTZODBXBJUͱ
w ը໘දࣔͷ࣮Ͱར༻͢Δ
w ฒߦॲཧͷΩϟϯηϧ
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4XJGU$PODVSSFODZ
w ݴޠߏจͱͯ͠ͷBTZODBXBJU
w ֤ฒߦॲཧؒͷؔੑΛཧ͢ΔͨΊͷ֓೦Ͱ͋Δ
4USVDUVSFE$PODVSSFODZ
w ҆શͳฒߦॲཧΛهड़͢ΔͨΊͷ৽ͨͳܕͰ͋Δ"DUPS
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BTZODBXBJU
ඇಉظॲཧɺฒߦॲཧΛಉظॲཧͱಉ͡Α͏ͳॻ͖ํͰɺ
؆͔ܿͭਖ਼֬ʹॻ͚ΔΑ͏ʹͨ͠ߏจ
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BTZODBXBJU
BTZODͰඇಉظͷ݁ՌΛΓͱͯ͠ఆٛ
BXBJUͰதஅɾ࠶։͢Δ
func fetchImage(url: URL) async throws -> UIImage? {
let request = imageRequest(url: url)
let (data, _) = try await URLSession.shared.data(for: request)
guard let image = UIImage(data: data) else {
return nil
}
return image
}
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ը໘දࣔͷ࣮Ͱར༻͢Δ
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ͭͷτϦΨʔͰෳͷը໘ΛϞʔμϧදࣔ͢Δ߹
lBMSFBEZQSFTFOUJOHXBSOJOHz͕ൃੜ
ޙଓͷը໘ද࣮ࣔߦ͞Εͳ͍
func tapButton() {
let coverVC1 = CoverViewController(rootView: .init(item: .red))
present(coverVC1, animated: true)
let coverVC2 = CoverViewController(rootView: .init(item: .yellow))
present(coverVC2, animated: true)
}
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BTZODBXBJUରԠ
දࣔதͷػΛࣔ͢ܕͷఆٛ
ฒߦॲཧͷ࣮
ฒߦॲཧͷݺͼग़͠
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BTZODBXBJUରԠ
දࣔதͷػΛࣔ͢ܕͷఆٛ
ฒߦॲཧͷ࣮
ฒߦॲཧͷݺͼग़͠
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දࣔதͷػΛࣔ͢ܕͷఆٛ
TVTQFOE͢Δը໘Λࣔ͢QSPUPDPM
@MainActor
protocol SuspendableViewControllerProtocol: AnyObject {
var didDisappearHandler: (() -> Void)? { get set }
}
typealias SuspendableViewController
= UIViewController & SuspendableViewControllerProtocol
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දࣔதͷػΛࣔ͢ܕͷఆٛ
TVTQFOE͢Δը໘ͷ࣮
class CoverViewController: UIHostingController,
SuspendableViewControllerProtocol {
var didDisappearHandler: (() -> Void)?
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
didDisappearHandler?()
}
}
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BTZODBXBJUରԠ
දࣔதͷػΛࣔ͢ܕΛ༻ҙ
ฒߦॲཧͷ࣮
ฒߦॲཧͷݺͼग़͠
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XJUI$IFDLFE$POUJOVBUJPO
ը໘දࣔ TVTQFOE
dը໘ඇදࣔ SFTVNF
ͷؒͷzػzΛ
ܧଓ DPOUJOVBUJPO
Λར༻͠ఆٛ͢Δ
extension UIViewController {
func presentAsync(_ viewController: SuspendableViewController,
animated: Bool,
completion: (() -> Void)? = nil) async {
present(viewController, animated: animated, completion: completion)
await withCheckedContinuation { continuation in
viewController.didDisappearHandler = {
continuation.resume()
}
}
}
}
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BTZODBXBJUରԠ
දࣔதͷػΛࣔ͢ܕΛ༻ҙ
ฒߦॲཧͷ࣮
ฒߦॲཧͷݺͼग़͠
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5BTL
TZODίʔυ͔ΒBTZODίʔυΛݺͼग़͢
func tapButton() {
Task {
let coverVC1 = CoverViewController(rootView: .init(item: .red))
await presentAsync(coverVC1, animated: true)
let coverVC2 = CoverViewController(rootView: .init(item: .yellow))
await presentAsync(coverVC2, animated: true)
}
}
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ฒߦॲཧͷΩϟϯηϧ
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ը໘දࣔΛΩϟϯηϧ͍ͨ͠߹
ޙଓͷը໘දࣔΛΩϟϯηϧ͢Δ
FYάϩʔόϧͳΤϥʔ͕ൃੜ࣌ʹը໘Λด͍ͨ͡
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5BTLDBODFM
5BTLΠϯελϯεΛอ࣋͠ɺΩϟϯηϧΛݺͼग़͢
var task: Task?
func tapButton() {
DispatchQueue.main.asyncAfter(deadline: .now() + 3) { [weak self] in
self?.task?.cancel()
}
self.task = Task {
let coverVC1 = CoverViewController(rootView: .init(item: .red))
await presentAsync(coverVC1, animated: true)
let coverVC2 = CoverViewController(rootView: .init(item: .yellow))
await presentAsync(coverVC2, animated: true)
}
}
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ڠௐతͳΩϟϯηϧ
5BTLDBODFM
ɺ
λεΫʹΩϟϯηϧ͞Εͨͱ͍͏ϑϥάΛཱͯΔ͚ͩͰɺ
Ωϟϯηϧ͞Ε͔ͨͲ͏͔֤λεΫଆͰ֬ೝ͢Δඞཁ͕͋Δ
IUUQTEPDTTXJGUPSHTXJGUCPPL-BOHVBHF(VJEF$PODVSSFODZIUNM
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ߏԽ͞Ε͍ͯͳ͍ฒߦੑ
w 5BTLܕΛѻ͏Α͏ͳ߹
w ߏԽ͞Ε͍ͯͳ͍ฒߦੑͰɺฒߦॲཧͷϥΠϑαΠΫϧ
ΩϟϯηϧΛ࣮ऀ͕ཧ͢Δ
IUUQTEFWFMPQFSBQQMFDPNWJEFPTQMBZXXED
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ΩϟϯηϧͷϋϯυϦϯά
w 5BTLJT$BODFMMFE
w 5BTLDIFDL$BODFMMBUJPO
w XJUI5BTL$BODFMMBUJPO)BOEMFS
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5BTLJT$BODFMMFE
ݱࡏͷλεΫ͕Ωϟϯηϧ͞Ε͍ͯͨͱ͖ɺҙͷॲཧΛߦ͏
func presentAsync(_ viewController: SuspendableViewController,
animated: Bool,
completion: (() -> Void)? = nil) async {
if Task.isCancelled {
return
}
present(viewController, animated: animated, completion: completion)
await withCheckedContinuation { continuation in
viewController.didDisappearHandler = {
continuation.resume()
}
}
}
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5BTLJT$BODFMMFE
ݺͼग़͠ଆ
func tapButton() {
DispatchQueue.main.asyncAfter(deadline: .now() + 3) { [weak self] in
self?.task?.cancel()
}
self.task = Task {
let coverVC1 = CoverViewController(rootView: .init(item: .red))
await presentAsync(coverVC1, animated: true)
let coverVC2 = CoverViewController(rootView: .init(item: .yellow))
await presentAsync(coverVC2, animated: true)
}
}
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5BTLJT$BODFMMFE
ޙଓͷը໘ද࣮ࣔߦ͞Εͳ͍
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5BTLDIFDL$BODFMMBUJPO
ݱࡏͷλεΫ͕Ωϟϯηϧ͞Ε͍ͯͨͱ͖ɺ
$BODFMMBUJPO&SSPSͷྫ֎Λฦ͢
func presentAsync(_ viewController: SuspendableViewController,
animated: Bool,
completion: (() -> Void)? = nil) async throws {
try Task.checkCancellation()
present(viewController, animated: animated, completion: completion)
await withCheckedContinuation { continuation in
viewController.didDisappearHandler = {
continuation.resume()
}
}
}
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5BTLDIFDL$BODFMMBUJPO
ݺͼग़͠ଆͰͷΩϟϯηϧ࣌ͷϋϯυϦϯά
func tapButton() {
DispatchQueue.main.asyncAfter(deadline: .now() + 3) { [weak self] in
self?.task?.cancel()
}
self.task = Task {
do {
let coverVC1 = CoverViewController(rootView: .init(item: .red))
try await presentAsync(coverVC1, animated: true)
let coverVC2 = CoverViewController(rootView: .init(item: .yellow))
try await presentAsync(coverVC2, animated: true)
} catch { // CancellationError
dismiss(animated: true)
}
}
}
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5BTLDIFDL$BODFMMBUJPO
BTZODؔͷ࣮ߦλΠϛϯάͰ
ྫ֎Λݕɺը໘Λด͡Δ
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Ωϟϯηϧ࣌ʹBTZODؔଆͰଈ࣌ʹߦ͏ϋϯυϦϯά
func presentAsync(_ viewController: SuspendableViewController, …) async {
if Task.isCancelled {
return
}
present(viewController, animated: animated, completion: completion)
await withTaskCancellationHandler(
handler: { // Sendable
Task { @MainActor in
viewController.dismiss(animated: true)
}
},
operation: {
await withCheckedContinuation { continuation in
viewController.didDisappearHandler = { continuation.resume() }
}
}
)
}
XJUI5BTL$BODFMMBUJPO)BOEMFS
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XJUI5BTL$BODFMMBUJPO)BOEMFS
දࣔதͷը໘Λด͡Δ
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·ͱΊ
w DPOUJOVBUJPOΛར༻͠ػঢ়ଶΛBTZODBXBJUͰදݱͨ͠
w ಉظίʔυ͔ΒBTZODؔΛݺͼग़͢ࡍʹ5BTLΛར༻͢Δ
w ඇߏԽ͞ΕͨฒߦੑͷΩϟϯηϧॲཧखಈͰߦ͏
w 5BTLJT$BODFMMFE
w 5BTLDIFDL$BODFMMBUJPO
w XJUI5BTL$BODFMMBUJPO)BOEMFS
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ࢀߟࢿྉ
w 4XJGUͷฒߦॲཧʹ͍ͭͯ
w IUUQTEFWFMPQFSBQQMFDPNKQOFXT JE PFVPU[
w $PODVSSFODZ5IF4XJGU1SPHSBNNJOH-BOHVBHF 4XJGU
w IUUQTEPDTTXJGUPSHTXJGUCPPL-BOHVBHF(VJEF$PODVSSFODZIUNM
w $PODVSSFODZc"QQMF%FWFMPQFS%PDVNFOUBUJPO
w IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOTXJGUTXJGU@TUBOEBSE@MJCSBSZ
DPODVSSFODZ
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5IBOLT🙌