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Xcode 16のPreviewModifierと@Previewableを活用した効率的なプ...
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ojun
July 05, 2024
Programming
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Xcode 16のPreviewModifierと@Previewableを活用した効率的なプレビュー方法の考察
ojun
July 05, 2024
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Transcript
potatotips #88 iOS/Android։ൃTipsڞ༗ձ 2024/07/05 @STORES Xcode 16ͷPreviewModifierͱ@Previewable Λ׆༻ͨ͠ޮతͳϓϨϏϡʔํ๏ͷߟ ojun -
DeNA Co., Ltd.
ࣗݾհʢojunʣ • name: ojun • 2023৽ଔೖࣾ • iOSΤϯδχΞ @ojun_9
Xcode 16ͷ PreviewModifier ͱ @Previewable Λ׆༻ͨ͠ޮతͳϓϨϏϡʔํ๏ͷߟ
PreviewModifier ͱ ˏPreviewable ʹ͍ͭͯ
@Previewable ʹ͍ͭͯ @Previewable Xcode 16 ͰՃ͞ΕͨϚΫϩ ϓϩύςΟʔϥούʔʹରͯ͠దԠ͢Δ͜ͱ͕Ͱ͖Δ #Previewͷ෦Ͱ༻Մೳ iOS
ʹؔͯ͠ iOS 18 Ҏ্Ͱಈ࡞͢Δ
None
PreviewModifierʹ͍ͭͯ PreviewModi fi er Xcode 16 ͰՃ͞Εͨprotocol iOS ʹؔͯ͠
iOS 18 Ҏ্Ͱಈ࡞͢Δ
None
None
None
None
None
None
None
None
Context Context
Context Context View
Context Context View
Context Context View
None
͜ͷ2ͭͷػೳΛݟͨ࣌ʹͲ͏ࢥ͍·ͨ͠ ͔ʁ
͜ͷ2ͭͷػೳΛݟͨ࣌ʹͲ͏ࢥ͍·͔ͨ͠ʁ ݸਓతʹ͜ΕΒͷػೳΛ࠷ॳʹݟͨ࣌ʮѻ͏ͷ͕େͦ͠͏ʯͱࢥͬͨ
͜ͷ2ͭͷػೳΛݟͨ࣌ʹͲ͏ࢥ͍·͔ͨ͠ʁ ݸਓతʹ͜ΕΒͷػೳΛ࠷ॳʹݟͨ࣌ʮѻ͏ͷ͕େͦ͠͏ʯͱࢥͬͨ
͜ͷ2ͭͷػೳΛݟͨ࣌ʹͲ͏ࢥ͍·͔ͨ͠ʁ ݸਓతʹ͜ΕΒͷػೳΛ࠷ॳʹݟͨ࣌ʮѻ͏ͷ͕େͦ͠͏ʯͱࢥͬͨ
͜ͷ2ͭͷػೳΛݟͨ࣌ʹͲ͏ࢥ͍·͔ͨ͠ʁ makeSharedContext() ͷ͍ํ͕؊ʹͳΔ mockαʔόͱ௨৴͢Δʁ → PreviewͰͦ͜·Ͱ͢Δͷ͔ʁ ݸਓతʹ͜ΕΒͷػೳΛ࠷ॳʹݟͨ࣌ʮѻ͏ͷ͕େͦ͠͏ʯͱࢥͬͨ
PreviewModifier ͱ @PreviewableΛ׆ ༻ͨ͠ޮతͳϓϨϏϡʔํ๏ͷߟ
લఏͱͳΔViewͷ࡞ SNSͷλΠϜϥΠϯΛߟ͑Δ
લఏͱͳΔViewͷ࡞ SNSͷλΠϜϥΠϯΛߟ͑Δ ߘΛද͢ߏମΛఆٛ
લఏͱͳΔViewͷ࡞ SNSͷλΠϜϥΠϯΛߟ͑Δ ViewΛఆٛ [Post] Λ࣋ͪ body Ͱར༻
લఏͱͳΔViewͷ࡞
લఏͱͳΔViewͷ࡞
લఏͱͳΔViewͷ࡞ PreviewͰͬͱද͍ࣔͤͨ͞ʂ
લఏͱͳΔViewͷ࡞
લఏͱͳΔViewͷ࡞
લఏͱͳΔViewͷ࡞
લఏͱͳΔViewͷ࡞ ಡΈࠐΈ࣌ͷ Placeholder େৎ͔ͳʁ ໊લ͘ͳͬͨ࣌େৎ͔ͳʁ վߦ͞ΕͨΒେৎ͔ͳʁӳޠɾֆจࣈͷ࣌ େৎ͔ͳ ͍͍Ͷͷ͕ଟ͍࣌େৎ͔ͳ 0݅ͷ࣌ඇදࣔʹͳΔ͔ͳʁ
લఏͱͳΔViewͷ࡞ ඞཁͳύλʔϯͷ Post ΛՃ͢Ε ෳύλʔϯͷ Preview Մೳ ͔͠͠ӈਤͷΑ͏ʹ͔ͳΓݟͮΒ͘ͳΔ
લఏͱͳΔViewͷ࡞ ඞཁͳύλʔϯͷ Post ΛՃ͢Ε ෳύλʔϯͷ Preview Մೳ ͔͠͠ӈਤͷΑ͏ʹ͔ͳΓݟͮΒ͘ͳΔ @Previewable
PreviewModi fi er Λར༻͠ ղܾ͢Δ
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ 1. JSONϑΝΠϧΛ࡞͠ɺඞཁͳσʔλΛՃ͢Δ
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ 1. JSONϑΝΠϧΛ࡞͠ɺඞཁͳσʔλΛՃ͢Δ 1. ʢࠓճ ChatGPT Λར༻ͯ͠࡞ʣ
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ 1. JSONϑΝΠϧΛ࡞͠ɺඞཁͳσʔλΛՃ͢Δ 1. ʢࠓճ ChatGPT Λར༻ͯ͠࡞ʣ
2. ʢ࡞͠Ճ͢Δ͚ͩͳͷͰׂѪʣ
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ 1. JSONϑΝΠϧΛ࡞͠ɺඞཁͳσʔλΛՃ͢Δ 1. ʢࠓճ ChatGPT Λར༻ͯ͠࡞ʣ
2. ʢ࡞͠Ճ͢Δ͚ͩͳͷͰׂѪʣ 2. JSONϑΝΠϧΛಡΈࠐΈ decode ͠ Preview ʹೖ
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ let posts: [Post] ͕ @Environment Ͱͳ͍߹
@Previewable Λར༻͢Δͱྑͦ͞͏
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ .task {} ͘͠ .onAppear {} Λ
ར༻ͦ͠ͷதͰಡΈࠐΈΛߦ͏
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ .task {} ͘͠ .onAppear {} Λ
ར༻ͦ͠ͷதͰಡΈࠐΈΛߦ͏ decode ͕ޭͨ͠Βɺposts ʹೖ ͢Δ
.task {} ͘͠ .onAppear {} Λ ར༻ͦ͠ͷதͰಡΈࠐΈΛߦ͏ decode ͕ޭͨ͠Βɺposts ʹೖ
͢Δ ෳͷύλʔϯͰ Preview ͕Մೳʹͳͬͨ 🎉
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ let posts: [Post] ͕ @Environment Ͱ͋Δ߹
PreviewModi fi er Λར༻͢Δͱྑͦ͞͏
@Previewable PreviewModifier Λར༻͠ղܾ͢Δ
None
None
·ͱΊ
·ͱΊ Xcode 16͔ΒPreviewModi fi er ͱ @Previewable ͕Ճ͞Εͨ ͜ΕΒΛར༻͢Δ͜ͱͰ Preview
ͷମݧ͕ΑΓ্͢Δ JSONϑΝΠϧΛར༻͠ΤϯςΟςΟΛೖ͢Δ͜ͱͰগ͠ͷίʔυͰଟྔͷύλʔϯΛ Preview Ͱ֬ೝ͢Δ͜ͱ͕Մೳ
͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
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![લఏͱͳΔViewͷ࡞ SNSͷλΠϜϥΠϯΛߟ͑Δ ViewΛఆٛ [Post] Λ࣋ͪ body Ͱར༻](https://files.speakerdeck.com/presentations/aa3ef61364f94b2280ea5a8808e405e0/slide_28.jpg){kind=link}
![@Previewable PreviewModifier Λར༻͠ղܾ͢Δ let posts: [Post] ͕ @Environment Ͱͳ͍߹](https://files.speakerdeck.com/presentations/aa3ef61364f94b2280ea5a8808e405e0/slide_43.jpg){kind=link}
![@Previewable PreviewModifier Λར༻͠ղܾ͢Δ let posts: [Post] ͕ @Environment Ͱ͋Δ߹](https://files.speakerdeck.com/presentations/aa3ef61364f94b2280ea5a8808e405e0/slide_48.jpg){kind=link}
