Custom Group Activities

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Custom Group Activities @TachibanaKaoru 2021/06/23 #potatotips #74

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ࣗݾ঺հ @TachibanaKaoru Freelance iOS Engineer ࠓ೥ͷWWDC͸ΧφμͰݟ͍ͯ·ͨ͠ɻ ࠓ೔͸·ͩؼࠃޙͷೋिִؒ཭ظؒதɻ

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Custom Group Activitiesͱ͸ FaceTimeͷηογϣϯΛ࢖ͬͯΞϓϦಠࣗͷ৘ใΛ΍ΓͱΓ͢Δ͜ͱ͕ Ͱ͖Δ࢓૊Έɻ αʔόʔΛ༻ҙͤͣʹήʔϜͷάϧʔϓରઓ΍άϧʔϓ࡞ۀͳͲΛ࣮૷ ͢Δ͜ͱ͕Ͱ͖Δɻ iOS15͔Βαϙʔτ

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How to implement Group Activities add entitlement (com.apple.developer.group-session) de fi ne activity model prepareForActivation activate join

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de fi ne activity model struct TextTogetherActivity: GroupActivity{ static let activityIdentifier = "org.toyship.characters.text" } extension TextTogetherActivity{ var metadata: GroupActivityMetadata{ var data = GroupActivityMetadata() data.type = .generic data.title = "character" data.fallbackURL = URL(string: "") return data } }

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prepareForActivation let myActivity = TextTogetherActivity() async { switch await myActivity.prepareForActivation() { case .activationDisabled: prepareStateLabel.text = "(disable)" case .activationPreferred: prepareStateLabel.text = "prepare OK" case .cancelled: prepareStateLabel.text = "cancelled" default: prepareStateLabel.text = "(unknown status)" } }

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activate let myActivity = TextTogetherActivity() myActivity.activate()

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join async{ for await session in TextTogetherActivity.sessions(){ switch session.state{ case GroupSession.State.joined: break case GroupSession.State.waiting: session.join() default: break } } }

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Group Activities Session FaceTime session Group Activities session

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Group Activities Session FaceTime session ActivityΛ ࡞ͬͯ activate ͢Δ Group Activities session FactTimeͷsession͕͋Δঢ়ଶͰactivateΛ͢ΔͱɺଞͷࢀՃ ऀʹԻͰ௨஌͞Ε·͢ɻ

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Group Activities Session FaceTime session Group Activities session join APIͰjoinΛݺͿલʹɺsystem UIͰɺ ʮΞϓϦ໊ʯʹࢀՃ͠·͔͢ʁͱ͍ ͏μΠΞϩάʹOK͢Δඞཁ͋Γɻ

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System UI Dialog Here!

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Group Activities Session FaceTime session Group Activities session join

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Group Activities Session FaceTime session Group Activities session

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Session timeline prepareForActivation prepareForActivation activate join session owner (system UI Ͱ OK)

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How to send and receive messages de fi ne message model send message receive message

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de fi ne message model struct ShareText: Codable{ let id: UUID var name: String var position: CGPoint = CGPoint(x: 0, y: 0) var red: CGFloat = 1.0 var green: CGFloat = 1.0 var blue: CGFloat = 1.0 var alpha: CGFloat = 1.0 }

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send message let messenger = GroupSessionMessenger(session: session) let newData = ShareText(id: UUID(), name: "Hello") messenger.send(newData, completion: {error in // check error })

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receive message async{ for await session in TextTogetherActivity.sessions(){ let messenger = GroupSessionMessenger(session: session) let task: Task.Handle = detach { [weak self] in for await (message, _ ) in messenger.messages(of: ShareText.self){ await self?.checkReceivedText(message) } } tasks.insert(task) } }

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Session information ηογϣϯʹࢀՃ͍ͯ͠Δਓ਺͸֬ೝՄೳ ͨͩ͠ɺਓ਺૿ݮͷ௨஌ͳͲ͸ൃੜ͠ͳ͍ ηογϣϯʹࢀՃ͍ͯ͠Δਓͷ৘ใʢFaceTimeΞΧ΢ϯτ໊ͳͲʣ͸औಘͰ ͖ͳ͍ɻ ૹड৴ϝοηʔδʹ͸ɺࢀՃऀͷIDʢಗ໊IDʣ͸෇Ճ͞Ε͍ͯΔ͕ɺͦΕҎ্ ͷ৘ใ͸ͳ͍ͨΊɺඞཁͳ৔߹ʹ͸ɺૹड৴ϝοηʔδʹؚΊͨ΄͏͕Α͍ɻ

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Pros and Cons ηογϣϯΛ؅ཧ͢Δඞཁ͕ʢ͋·Γʣͳ͍ αʔόʔߏஙͷඞཁ͕ͳ͍

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Pros and Cons FaceTimeͷΞΧ΢ϯτ͕ඞཁ iOS15͕ඞཁ ࢀՃऀ΍୺຤ͷ৘ใ͕खʹೖΒͳ͍

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delay on Group Activities ݱ࣌఺Ͱ͸ɺηογϣϯΛషΔͷ·Ͱ͕͔͔࣌ؒΔ͜ͱ͕͋Δ ϝοηʔδૹड৴࣌ͷ஗Ԇ͸΄ͱΜͲײ͡ͳ͍͕ɺࢀՃਓ਺΍ωοτ ϫʔΫ؀ڥʹେ͖͘ґଘ͢ΔͱࢥΘΕΔ FaceTimeͷάϧʔϓ௨࿩͸࠷େ32ਓ͕ͩɺGroup ActivitiesͰԿਓ·Ͱ αϙʔτ͢Δͷ͔͸ෆ໌ɻ

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Environment Tips ಉ͡FaceTimeΞΧ΢ϯτʴෳ਺ͷσόΠεͰFaceTime SessionΛ࡞ͬͯ ΋͏·͍͔͘ͳ͍৔߹͕͋Δɻ WWDCͷϓϨθϯͰ͸͏·͍͍ͬͯ͘ΔΑ͏ʹݟ͑·͕ͨ͠ɺखݩͰ ͸͏·͍͖͘·ͤΜͰͨ͠ɻ ։ൃ༻ʹผFaceTimeΞΧ΢ϯτΛ༻ҙͨ͠ํ͕҆શɻ

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Environment Tips Group ActivitiesରԠΞϓϦͷTestFlightͰͷ഑෍͸ɺݱ࣌఺Ͱ͸αϙʔτ ͞Ε͍ͯ·ͤΜɻ Group ActivitiesͷΞϓϦͰ͸ɺGroupAcͰඞཁͳ com.apple.developer.group-sessionͷcode signing entitlement͕ඞཁͰ ͕͢ɺͦΕΛద༻͢ΔͱiTunes connectͰͷΞοϓϩʔυ࣌ʹΤϥʔ͕ ൃੜ͠·͢ɻ

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·ͱΊ Custom Activities͸ɺάϧʔϓηογϣϯΛ؆୯ʹ࣮૷Ͱ͖Δͷ͕ັྗ తɻ ͨͩ͠ɺ։ൃ؀ڥΛ༻ҙ͢Δͷ͕গ͠େม͔΋ɻ iOS15୺຤͕ෳ਺͋ͬͨΒࢼͯ͠Έ·͠ΐ͏ɻ