SwiftUI,Combine Framework,KeyPath - 堅固な関係からSwiftUI への閾値を下げる

by notoroid

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4XJGU6* $PNCJOF 'SBNFXPSL ,FZ1BUI ݎݻͳؔ܎͔Β4XJGU6*΁ͷᮢ஋ΛԼ͛Δ

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ࣗݾ঺հ

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ೳొཁ !OPUPSPJE w J04ΞϓϦ։ൃऀ w ԰߸͍Γ·͢ిࢉاը w !OPUPSPJE w !JSJNBTV w Fεϙʔπ

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ॆిใࠂ͞Μ #BUUFSFDFJWFS w όοςϦʔϞχλʔ ϢʔςΟϦςΟʔ w ࠷େ୆ ࣮ػϦϞʔτ୆ w ख࣋ͪͷJ1IPOF͔Βଞʹ͍࣋ͬͯΔ J1IPOF J1BEͳͲͷػثͷόοςϦʔঢ়ଶ֬ ೝՄೳ w ࣗ୐ʹ͋ΔJ1IPOFͷόοςϦʔঢ়ଶ֬ೝՄ ೳ

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ॆిใࠂ͞Μ #BUUFSFDFJWFS w ॆి׬ྃ௨஌ w ॆి׬ྃΛ఻͑ͯ͘ΕΔ௨஌Λ௥Ճɻ w ҎԼʹࢦఆ͢Δ͜ͱͰόοςϦʔ ΛέΞ͢Δ͜ͱ͕Մೳ w Կ͔ͱߴ͍J1IPOFΛ௕࣋ͪͤ͞Δͷʹ༗ ༻

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୊໨ w ։ൃͨ͠ΞϓϦͷۙگ w ։ൃελΠϧస׵ͷલ৮Ε w ,FZ1BUI w $PNCJOFGSBNFXPSL

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։ൃͨ͠ΞϓϦͷۙگ

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0CKFDUJWF$͔Β4XJGU΁ͷҠ২ͨ͠ΞϓϦ

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ಈ͘ϦϦʔε͢Δ͜ͱΛ༏ઌ

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ݱࡏ͸಺෦ߏ଄Λ੔ཧͭͭ͠ ৽ػೳରԠத

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։ൃελΠϧస׵ͷલ৮Ε

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4XJGU6*ΞϓϦ։ൃͰ ௚໘ͨ͜͠ͱ

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ଞ4XJGUͷςΫϊϩδʔΛ ஌Βͳ͍ͱ࡞ۀ͕ετοϓ͢Δ

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"QQMFఏڙ4XJGUಛԽͷ ༗໊ϑϨʔϜϫʔΫ͸ͭ $PNCJOFGSBNFXPSL 4XJGU6*

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։ൃऀ૚͕ 0CKFDUJWF$ΑΓ΋ ް͍ 4XJGUʹಛԽͨ͠ϑϨʔϜϫʔΫ͸ ૿͑ͯ͘Δ͔΋

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4XJGU6*Ͱ΋࢖ΘΕ͍ͯΔ 4XJGUͷςΫϊϩδʔΛઆ໌ͯ͠ΈΔ

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ຖ೔೦෹ͱͯ͠๨Εͳ͍Α͏ʹ এ͑ͯ΋Α͍͙Β͍Λબͼ·ͨ͠

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,FZ1BUI

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ΩʔΛ౉ͯ͠஋ʹ ΞΫηεͰ͖Δػೳ

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4XJGU͔Βݱࡏͷ,FZ1BUIͷܗʹ 0CKFDUJWF$͔Β͋Δػೳͱ͸ผ෺

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,FZQBUI 4XJGUʙ w ܕΛݫີʹѻ͏จࣈྻͰͷΩʔ஋ΞΫηεΛલఏͱ͠ͳ͍ w /40CKFDUඇґଘ 4XJGUͰͷར༻ಛԽ w ఆٛؒͷύε࿈͕݁Մೳ w ഑ྻ΁ͷΞΫηε͕Մೳ

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࢖͍ํ ɾࣗ෼ࣗ਎Λ໌ࣔ͢Δ৔߹ a<Ϋϥε໊>Ωʔ໊\Ωʔ໊^ ɾࣗݾݴٴ͢Δ৔߹͸4FMGΛ࢖༻Ͱ͖Δ a4FMGΩʔ໊ ɾলུܗ͕ڐՄ͞Ε͍ͯΔ aΩʔ໊ ɾ഑ྻ΋ࢦఆͰ͖Δ a<Ϋϥε໊>഑ྻΩʔ໊<ΠϯσοΫε஋>

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Ωʔͷ࿈݁ a<Ϋϥε໊>Ωʔ໊BQQFOEJOH a<Ϋϥε໊>Ωʔ໊ BQQFOEJOHΛ࢖Θͳͯ͘΋࿈݁ͯ͠هड़Մೳ

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4XJGUͷࠒͷ༻్ w ,70 ,FZ7BMVF0CTFSWJOH ͱͯ͠࢖༻ <ΦϒδΣΫτ໊>PCTFSWF <Ωʔύε> PQUJPOT<Φϓγϣϯ> \ <ΦϒδΣ Ϋτ> <มߋ> JO ^

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4XJGUҎ߱ͷ,FZ1BUIͷ༻్ w ,70 ,FZ7BMVF0CTFSWJOH w $PNCJOFGSBNFXPSL w NBQ w BTTJHO w 4XJGU6* w 'PS&BDI -JTU 'PSN w FOWJSPONFOU

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ॆిใࠂ͞ΜͰͷ,FZ1BUI࢖༻ճ਺ ؔ਺໊ ࢖༻਺ ϑϨʔϜϫʔΫ ༻్ NBQ $PNCJOFGSBNFXPSL 'PS&BDI 4FMGTVQQPSUF E-PDBMFT 4XJGU6* 1SFWJFX FOWJSPONFOU aMPDBMF MPDBMF 4XJGU6* 1SFWJFX BTTJHO UP PO $PNCJOFGSBNFXPSL 'PS&BDI JEaTFMG 4XJGU6* FOWJSPONFOU aJT&OBCM FE 4XJGU6*

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,FZ1BUIͷ༻్4XJGU6*ΞϓϦ w $PNCJOFGSBNFXPSL࢖༻࣌ʹ஋ͷऔΓग़͠खஈͱͯ͠ར༻͕࠷ଟ w ҙ֎ʹ1SFWJFXͰͷ༻్͕ଟ͍ ϩέʔϧΛมߋͯ͠ͷ֬ೝ w 'PS&BDIͰͷ༻్͸άϥϑද͚ࣔͩ࢖༻

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$PNCJOFGSBNFXPSL

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$PNCJOFGSBNFXPSL w σʔλͷྲྀྔɺྲྀ଎Λ੍ޚ͢ΔͨΊͷϑϨʔϜϫʔΫ w ඇಉظʹ΋ରԠ w σʔλ͸جຊܕɺߏ଄ܕɺྻڍܕɺΦϒδΣΫτΛࢦఆͰ͖Δ w 4XJGUͷػೳΛଟ༻ (FOFSJD ,FZ1BUI w ϑϨʔϜϫʔΫ͕ඞཁ JNQPSU$PNCJOF J04ʙ

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Πϝʔδਤ

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σʔλ σʔλ σʔλ σʔλͷೖΓޱ

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σʔλͷมܗ σʔλC σʔλC σʔλC σʔλC σʔλB σʔλB

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σʔλC σʔλC σʔλC σʔλC σʔλB σʔλB 1VCMJTIFST 4VCTDSJCFST 0QFSBUPST σʔλͷมܗ σʔλͷมܗɺσʔλͷྲྀ଎ɺσʔλͷྲྀྔͷՃ޻ σʔλͷൃߦऀ σʔλͷߪಡऀ

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JNQPSU6*,JU JNQPSU$PNCJOF WBSBOZ$BODFMBCMF4FU"OZ$BODFMMBCMF MFUQBTTUISPVHI4VCKFDU1BTTUISPVHI4VCKFDU*OU /FWFS MFUQBTTUISPVHI4VCKFDU1BTTUISPVHI4VCKFDU4USJOH /FWFS QBTTUISPVHI4VCKFDU NBQ\WBMVFJO 4USJOHa WBMVF ^ TVCTDSJCF QBTTUISPVHI4VCKFDU QBTTUISPVHI4VCKFDUTJOL\ WBMVF JO QSJOU QBTTUISPVHI4VCKFDUTJOLWBMVFa WBMVF ^TUPSF JOBOZ$BODFMBCMF 1VCMJTIFS୲౰ 4VCTDSJCFS୲౰ 0QFSBUPS୲౰

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σʔλͷൃߦݩ͸छྨ

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1VCMJTIFS݉4VCTDSJCFS 1VCMJTIFSͷछྨᶃᶄ w1BTTUISPVHI4VCKFDU w$VSSFOU7BMVF4VCKFDU 1VCMJTIFS σʔλͷൃߦݩ ͱ4VCKFDU σʔλ ͷߪಡଆ Λ݉ͶΔɺσʔλܕͷม׵ʹ͸ద੾ͳ 0QFSBUPSTΛ࢖͏ NBQͳͲ

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ඇಉظॲཧ 1VCMJTIFSͷछྨᶅ w'VUVSF ϦΫΤετޙɺඇಉظͰσʔλ͕खʹೖΔॲཧ ωοτϫʔΫϦΫΤε τͳͲ ͷσʔλΛड͚औΔͷʹར༻͢ΔɻΤϥʔΛऔಘͰ͖ͣΤϥʔ ͕ฦͬͯ͘Δ͜ͱ΋͋Δ

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$PNCJOFGSBNFXPSLͷಛ௃

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ΤϥʔϨʔϯͷ༗ແ͕બ΂Δ

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σʔλͷೖΓޱ

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σʔλͷೖΓޱ

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σʔλͷೖΓޱ

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MFUQBTTUISPVHI4VCKFDU1BTTUISPVHI4VCKFDU*OU /FWFS QBTTUISPVHI4VCKFDUTFOE QBTTUISPVHI4VCKFDUTJOL\ WBMVF JO QSJOU QBTTUISPVHI4VCKFDUTJOLWBMVFa WBMVF ^TUPSF JOBOZ$BODFMBCMF QBTTUISPVHI4VCKFDUTFOE MFUDVSSFOU7BMVF4VCKFDU$VSSFOU7BMVF4VCKFDU*OU /FWFS DVSSFOU7BMVF4VCKFDUTJOL\ WBMVF JO QSJOU DVSSFOU7BMVF4VCKFDUTJOLWBMVFa WBMVF ^TUPSF JOBOZ$BODFMBCMF 'VUVSF*OU /FWFS\QSPNJTFJO 5ISFBETMFFQ GPS5JNF*OUFSWBM %JTQBUDI2VFVFHMPCBM BTZOD\ %JTQBUDI2VFVFNBJOBTZOD\ QSPNJTF TVDDFTT ^ ^ ^ TJOL\ WBMVF JOQSJOU 'VUVSFTJOLWBMVFa WBMVF ^TUPSF JOBOZ$BODFMBCMF TVCTDSJCF QBTTUISPVHI4VCKFDU TUPSF JOBOZ$BODFMBCMF ΤϥʔϨʔϯͳ͠

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MFUQBTTUISPVHI4VCKFDU1BTTUISPVHI4VCKFDU*OU &SSPS QBTTUISPVHI4VCKFDUTFOE QBTTUISPVHI4VCKFDUTJOL SFDFJWF$PNQMFUJPO\ DPNQMFUJPO JO TXJUDIDPNQMFUJPO\ DBTFGBJMVSF MFUFSSPS QSJOU QBTTUISPVHI4VCKFDUMPDBMJ[FE%FTDSJQUJPOa FSSPSMPDBMJ[FE%FTDSJQUJPO DBTFpOJTIFE CSFBL ^ ^ \ WBMVF JO QSJOU QBTTUISPVHI4VCKFDUTJOLWBMVFa WBMVF ^TUPSF JOBOZ$BODFMBCMF QBTTUISPVHI4VCKFDUTFOE MFUDVSSFOU7BMVF4VCKFDU$VSSFOU7BMVF4VCKFDU*OU &SSPS DVSSFOU7BMVF4VCKFDUTJOL SFDFJWF$PNQMFUJPO\ DPNQMFUJPO JO TXJUDIDPNQMFUJPO\ DBTFGBJMVSF MFUFSSPS QSJOU DVSSFOU7BMVF4VCKFDUMPDBMJ[FE%FTDSJQUJPOa FSSPSMPDBMJ[FE%FTDSJQUJPO DBTFpOJTIFE CSFBL ^ ^ SFDFJWF7BMVF\ WBMVF JO QSJOU DVSSFOU7BMVF4VCKFDUTJOLWBMVFa WBMVF ^ TUPSF JOBOZ$BODFMBCMF 'VUVSF*OU &SSPS\QSPNJTFJO 5ISFBETMFFQ GPS5JNF*OUFSWBM %JTQBUDI2VFVFHMPCBM BTZOD\ %JTQBUDI2VFVFNBJOBTZOD\ QSPNJTF TVDDFTT ^ ^ ^ TJOL SFDFJWF$PNQMFUJPO\ DPNQMFUJPO JO TXJUDIDPNQMFUJPO\ DBTFGBJMVSF MFUFSSPS QSJOU 'VUVSFMPDBMJ[FE%FTDSJQUJPOa FSSPSMPDBMJ[FE%FTDSJQUJPO DBTFpOJTIFE CSFBL ^ ^ SFDFJWF7BMVF\ WBMVF JO QSJOU 'VUVSFTJOLWBMVFa WBMVF ^ TUPSF JOBOZ$BODFMBCMF ΤϥʔϨʔϯ͋Γ

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$PNCJOF$PNNVOJUZ SYTXJGUUPDPNCJOFDIFBUTIFFU HJUIVCDPN$PNCJOF$PNNVOJUZSYTXJGUUPDPNCJOFDIFBUTIFFU 3Y4XJGUͱͷػೳൺֱ

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6TJOH$PNCJOF IFDLKHJUIVCJPTXJGUVJOPUFT $PNCJOFGSBNFXPSLͷ࢖͍ํ

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ϥΠόϧ 3Y4XJGU ΑΓ΋ܰྔͳ ͷͰ͓͢͢Ί