ABEMA iOS 大規模プロジェクトにおける段階的な技術刷新 / ABEMA iOS Technology Upgrade

$"TXJGU େن໛ϓϩδΣΫτʹ͓͚Δ ஈ֊తͳٕज़࡮৽ גࣜձࣾ"CFNB57 ҆Ҫӯஉ

ࣗݾ঺հ w ҆Ҫӯஉ"LJP:BTVJ w ೥גࣜձࣾ"CFNB57৽ଔೖࣾ w 4/4!BLLZJF w J04ΞϓϦͷج൫पΓΛ୲౰ w
೥͝Ζ͔ΒΞʔΩςΫνϟؔ࿈ͷऔΓ૊Έ

ΞδΣϯμ w എܠ w ҠߦϓϩδΣΫτͷਐΊํ w ৽ϓϩδΣΫτͷٕज़ελοΫ w ΩϟονΞοϓͷͨΊͷऔΓ૊Έ w
ࠓޙͷऔΓ૊Έ

എܠ ։ہप೥Λܴ͑Α͏ͱ͍ͯ͠Δ"#&." גࣜձࣾ"CFNB57ձࣾઆ໌ࢿྉ IUUQTTQFBLFSEFDLDPNBCFNBUW[IVTIJIVJTIFBCFNBUWIVJTIFTIVPNJOH[JMJBP

എܠ ෛ࠴Խ͢Δٕज़ͱɺ৽ͨͳτϨϯυ $PDPB1PET 3Y4XJGU 6ONBJOUBJOFE 5IJSEQBSUZ -JCSBSJFT 4UPSZCPBSE 4XJGU1. 4XJGU6*
,PUMJO .VMUJQMBUGPSN $PODVSSFODZ

എܠ ,PUMJO.VMUJQMBUGPSNͷಋೖ w ೥͝Ζ͔Β,PUMJO.VMUJQMBUGPSNͷಋೖݕূΛ։࢝ ˠຊ֨ಋೖΛܾఆ w ೥ݱࡏɺJ04ଆΛؚΊͨ΄ͱΜͲͷϞόΠϧΤϯδχΞ͕ ,PUMJO.VMUJQMBUGPSNͷڞ௨࣮૷΋ؚΊͯ։ൃ͍ͯ͠Δ "#&."ϞόΠϧΞϓϦ։ൃͷ%FW0QTઓུ
IUUQTDBEDDZCFSBHFOUDPKQQSPHSBNBCFNBNPCJMFBQQEFWPQT AbemaTV, Inc. All Rights Reserved  1 .VMUJQMBUGPSN&OHJOFFSJOH3PBENBQGPSUIF'VUVSF IUUQTEFWFMPQFSBCFNBJPTFTTJPOTCWKQX+&P(1

എܠ ,PUMJO.VMUJQMBUGPSNͷಋೖ 4XJGU ωΠςΟϒ ࣮૷ 4XJGU 6*࣮૷ ,.1
ڞ௨࣮૷ طଘ ཧ૝ܥ API

എܠ ,PUMJO.VMUJQMBUGPSNͷಋೖ Ͳ͏Ҡߦ͢Δ͔ʁ طଘ ཧ૝ܥ 4XJGU ωΠςΟϒ ࣮૷ 4XJGU
6*࣮૷ ,.1 ڞ௨࣮૷ API

എܠ ,PUMJO.VMUJQMBUGPSNͷಋೖ ෛ࠴Խͨ͠ ґଘ΍ઃܭɾ࣮૷Λ Ҿ͖ܧ͗ͭͭҠߦ͢Δͷ͸ ίετ͕ߴ͍ $PDPB1PET 3Y4XJGU 6ONBJOUBJOFE 5IJSEQBSUZ
-JCSBSJFT 4UPSZCPBSE

എܠ ,PUMJO.VMUJQMBUGPSNͷಋೖ ෛ࠴Խͨ͠ ґଘ΍ઃܭɾ࣮૷Λ Ҿ͖ܧ͗ͭͭҠߦ͢Δͷ͸ ίετ͕ߴ͍ ผϓϩδΣΫτԽͯ͠ ஈ֊తʹҠߦ $PDPB1PET 3Y4XJGU
6ONBJOUBJOFE 5IJSEQBSUZ -JCSBSJFT 4UPSZCPBSE

ҠߦϓϩδΣΫτͷਐΊํ

ҠߦϓϩδΣΫτͷਐΊํ ͜Ε·ͰͷϓϩδΣΫτߏ੒ ,.1 ڞ௨࣮૷ طଘ࣮૷ ґଘϥΠϒϥϦ $PDPB1PET BCFNBJPT BCFNBOBUJWF

ҠߦϓϩδΣΫτͷਐΊํ ৽ͨͳϓϩδΣΫτߏ੒ ,.1 ڞ௨࣮૷ طଘ࣮૷ ґଘϥΠϒϥϦ $PDPB1PET ৽ϓϩδΣΫτ ґଘϥΠϒϥϦ 4XJGU1.
BCFNBJPT BCFNBOBUJWF

BCFNBJPT BCFNBOBUJWF ৽ϓϩδΣΫτͰ͸ େ෦෼Λ,.1Ͱڞ௨Խ͢Δ લఏͷઃܭɾ࣮૷ʹدͤΔ 4XJGU1.ɺ$PODVSSFODZͳͲ ৽نٕज़ελοΫͷಋೖ

BCFNBJPT BCFNBOBUJWF ❌ ৽ϓϩδΣΫτ͔Β طଘ࣮૷ʹ͸ ΞΫηεͰ͖ͳ͍ ˠچ࣮૷͕ ࢒Γଓ͚ΔͷΛ๷͙

BCFNBJPT BCFNBOBUJWF طଘ࣮૷͔Β 4XJGU1.ͷґଘ΋࢖͑Δ ˠੵۃతʹґଘ؅ཧΛ ҠߦͰ͖ΔΑ͏ʹ

ҠߦϓϩδΣΫτͷਐΊํ ৽ͨͳϓϩδΣΫτߏ੒ BCFNBJPT BCFNBOBUJWF طଘ࣮૷ public class NewViewController:  UIViewController {
... } public struct NewView: View { ... } طଘϓϩδΣΫτ͸ը໘୯ҐͰ ৽ϓϩδΣΫτͷ࣮૷Λར༻ ˠطଘͷϧʔςΟϯάʹ૊ΈࠐΈ΍͘͢

ҠߦϓϩδΣΫτͷਐΊํ ৽ͨͳϓϩδΣΫτߏ੒ BCFNBJPT BCFNBOBUJWF طଘ࣮૷ ը໘දࣔ࣌ʹ'FBUVSF'MBHʹΑͬͯ੾Γସ͑Δ ஈ֊తʹద༻ൣғΛ޿͛Δɾෆ۩߹͕͋Ε͹طଘ࣮૷ʹ੾Γ໭͠ ʢετϥϯάϥʔϑΟάɾύλʔϯͷ࣮ફʣ public class
NewViewController:  UIViewController { ... } public struct NewView: View { ... }

ҠߦϓϩδΣΫτͷਐΊํ Ҡߦͷεςʔλε w ओͳ࡞඼λΠϓछྨͷ͏ͪɺछྨͷࢹௌը໘͕ҠߦࡁΈ w ಈը࠶ੜ΍ෳࡶͳΠϯλϥΫγϣϯΛؚΉओཁͳը໘͕ҠߦͰ͖͍ͯΔ w ଞछྨͷҠߦ΋ਐߦத w ৽نػೳͷ࣮૷͸ੵۃతʹ৽ϓϩδΣΫτଆͰߦ͏ํ਑
w ىಈ࣌ͷγʔέϯεͳͲΛؚΜͩج൫తͳ࣮૷ͷҠߦ΋ܭըத

৽ϓϩδΣΫτͷٕज़ελοΫ

৽ϓϩδΣΫτͷٕज़ελοΫ w 4XJGU1BDLBHF.BOBHFS w طଘͷ$PDPB1PET͔Βஈ֊తʹґଘΛҠߦத w ΞϓϦ಺ͷϞδϡʔϧఆٛʹ͸࢖༻͍ͯ͠ͳ͍ʢޙड़ʣ w 4XJGU6* w
طଘͱͷܨ͗ࠐΈ΋౿·͑ͯɺϧʔςΟϯά͸6*,JUϕʔε ʢ6*7JFX$POUSPMMFSϕʔεʣͰߦ͏ w ֤ը໘୯ҐͰͷ6*࣮૷΍ঢ়ଶ؅ཧ͸4XJGU6*ϕʔε w 4XJGU6*ಋೖʹ͋ͨͬͯͷ޻෉͸ኍ઒͞Μͷηογϣϯʹͯ w $PODVSSFODZ w 4USJDU$IFDLJOH΋$PNQMFUFͰӡ༻தʢޙड़ʣ

৽ϓϩδΣΫτͷٕज़ελοΫ 4XJGU1BDLBHF.BOBHFS w αʔυύʔςΟʔϥΠϒϥϦ΁ͷґଘͳͲΛ$PDPB1PET͔ΒҠߦத w ΞϓϦ಺ͷϞδϡʔϧఆٛʹ΋࢖༻͍ͯͨ͠ ˠطଘͱಉ͘͡9DPEF(FOʹΑΔఆٛʹ໭ͨ͠ w ,PUMJO.VMUJQMBUGPSNͱͷ૬ੑ໰୊ʢݕূ౰࣌ʣ w
,.1ଆ΋౎౓Ϗϧυ͍͕ͨ͠ɺ4XJGU1.Ͱ͸੍໿͕ଟ͍ ʢ#VJME5PPMͰ͸ϑϨʔϜϫʔΫ͸ੜ੒ɾࢀরͰ͖ͳ͍ɾ (SBEMFͷ࣮ߦʹඞཁͳωοτϫʔΫΞΫηεͳͲΛڐՄͰ͖ͳ͍ʣ w 9DPEFଆͷ1SFCVJME"DUJPOͰ9$'SBNFXPSLΛੜ੒ͯ͠ࢀর͢Δ͔͠ ͳ͍ ˠϏϧυ͕ෆ҆ఆʹͳΔ໰୊͕͋ͬͨ w طଘϓϩδΣΫτଆʹ΋໰୊͕೾ٴͨ͠ w %FCVH3FMFBTFͰґଘΛ੾Γସ͑ΒΕͳ͍ʢະ࣮૷ʣ

ҠߦϓϩδΣΫτͷਐΊํ $PODVSSFODZ w طଘϓϩδΣΫτʹ͓͚ΔରԠํ਑ w 4XJGUϞʔυͰӡ༻͠ɺ$PODVSSFODZ͸ੵۃతʹ͸ಋೖ͠ͳ͍ w ޿ൣʹར༻͍ͯ͠Δ3Y4XJGUͳͲͱซ༻͢ΔܗͰӡ༻͢Δͷ͸ ೉қ౓͕ߴ͍ w
ˠಘΒΕΔԸܙʹରͯ͠ɺ݁ՌతʹෳࡶԽͨ͠Γෆ҆ఆͳ࣮૷ʹͳΔ ϦεΫ͕େ͖͍ w طଘϓϩδΣΫτ಺ͰͷҠߦΑΓ΋ɺ৽ϓϩδΣΫτ΁ͷҠߦΛ ༏ઌ͢Δ

ҠߦϓϩδΣΫτͷਐΊํ $PODVSSFODZ w ৽ϓϩδΣΫτʹ͓͚ΔରԠํ਑ w 4XJGUϞʔυʹ͸Ͱ͖͍ͯͳ͍ʢҰ౓༗ޮԽͨ͠ޙʹແޮԽʣ w ,.1͕ੜ੒ͨ͠0CKFDUJWF$ϑϨʔϜϫʔΫʹ౉ͨ͠Ϋϩʔδϟ͕ ݺͼग़͞Εͨͱ͖ɺ4XJGUϥϯλΠϜ͕Ϋϥογϡ͢Δ৔߹͕͋Δ w
ࢀߟIUUQTBQMVTSTPCKFDUJWFDDBMMCBDLDSBTIFTTXJGU w ˠ4XJGUϞʔυʹ໭ͭͭ͠ɺ4XJGUͰ ༗ޮʹͳΔ6QDPNJOH'FBUVSFTΛ શͯΦϯʹͯ͠ӡ༻த ʢ4USJDU$IFDLJOH$PNQMFUFΛؚΊͯʣ w ,PUMJOͷ4XJGUFYQPS t ʹظ଴ʁ

৽ϓϩδΣΫτͷٕज़ελοΫ $PODVSSFODZ w ϙϦγʔΛࣾ಺υΩϡϝϯτͱͯ͠໌จԽͯ͠ӡ༻த

৽ϓϩδΣΫτͷٕज़ελοΫ $PODVSSFODZରԠํ਑ w ४ڌͰ͖Δσʔλܕ͸Sendableʹ४ڌͤ͞Δ w 6*ؔ࿈ͷܕ΍ॲཧ͸@MainActorΛ෇༩͢Δ w 6*ͷঢ়ଶ؅ཧͳͲΛεϨουηʔϑʹ࣮૷͢ΔϝϦοτΑΓ΋ ࣮૷ෛ୲ͷܰݮΛʢݱঢ়Ͱ͸ʣ༏ઌ͢Δ w
4XJGU͕ಋೖ͞Ε͍ͯͳ͍֎෦ϥΠϒϥϦΛ࢖͏ࡍͷରԠखஈ w MainActorͷΈ͔ΒΞΫηε͢Δ w Sendableʹ४ڌͤ͞Δ w SendableͳܕͰϥοϓ͢Δ w nonisolated(unsafe) letม਺Λఆٛ͢Δ w ʢ࠷ऴखஈͱͯ͠ʣ@preconcurrency importΛ࢖͏

৽ϓϩδΣΫτͷٕज़ελοΫ $PODVSSFODZӡ༻্ͷ޻෉ w TaskBagܕͷಋೖ w 3Y4XJGUͷDisposeBagͱಉ༷ͷ ࢖͍উखͰTaskΛ؅ཧ

৽ϓϩδΣΫτͷٕज़ελοΫ $PODVSSFODZӡ༻্ͷ޻෉ w TaskBagܕͷಋೖ w 3Y4XJGUͷDisposeBagͱಉ༷ͷ ࢖͍উखͰTaskΛ؅ཧ w 5BTL#BHͰ͸ @_implicitSelfCaptureଐੑΛ
Ϋϩʔδϟʹ෇༩͠ͳ͍ w deinitىҼͰΩϟϯηϧ͍ͨ͠ ॲཧ͕selfͷ҉໧తͳΩϟϓνϟ ʹΑͬͯΩϟϯηϧ͞Εͳ͘ͳΔ ࣄ৅Λ๷͙

ΩϟονΞοϓͷͨΊͷऔΓ૊Έ

ΩϟονΞοϓͷͨΊͷऔΓ૊Έ ࣄۀ෦Λލ͍ͩڞ༗ձ w "#&."ɺλοϓϧɺ"NFCBɺ$-ͷϝϯόʔΛத৺ͱ֤ͯ͠ࣄۀ෦ͷ ରԠঢ়گ΍஌ݟΛࣾ಺શମʹڞ༗

ΩϟονΞοϓͷͨΊͷऔΓ૊Έ $PODVSSFODZ1MBZHSPVOE w $PODVSSFODZʹؔ͢Δجૅ஌ࣝΛΩϟονΞοϓ͢ΔͨΊͷ 9DPEF1MBZHSPVOEΛ࡞੒͠ɺࣾ಺Ͱల։

ΩϟονΞοϓͷͨΊͷऔΓ૊Έ $PODVSSFODZ1MBZHSPVOE ࣮ࡍʹಈ࡞͢ΔίʔυͰ "DUPS΍4FOEBCMFͷ໾ׂΛ ֬ೝͰ͖ΔΑ͏ʹ

ࠓޙͷऔΓ૊Έ

ࠓޙͷऔΓ૊Έ w ҠߦϓϩδΣΫτͷਐߦ w ֤ը໘ͷ࣮૷΍ج൫࣮૷ɺґଘ؅ཧͷҠߦΛਐΊΔ w ϞϊϦϙδτϦԽ w ։ൃޮ཰Λߋʹ޲্ͤ͞ΔͨΊɺطଘϓϩδΣΫτ΋,.1࣮૷΍ ৽ϓϩδΣΫτͱಉ͡ϦϙδτϦʹҠ؅͢Δ
w ௕ظతʹ͸"OESPJE΍UW04ͷϓϩδΣΫτ౷߹΋ࢹ໺ w ӡ༻ϙϦγʔɾΩϟονΞοϓࢿྉͷॆ࣮ w $PODVSSFODZͳͲ৽͍ٕ͠ज़ελοΫͷӡ༻࣮੷ΛੵΈͭͭɺ ஌ݟΛࢿྉԽ͍ͯ͘͠ w Ώ͘Ώ͘͸ࣾ֎ൃ৴΋ʜʁ

·ͱΊ w "#&."Ͱ͸,.1த৺ͷ࣮૷ʹҠߦ͢Δͱಉ࣌ʹɺٕज़ελοΫͷ࡮৽΋ ਐΊ͍ͯΔ w ϓϩδΣΫτΛ৽نʹ࡞੒ͯ͠ը໘୯ҐͰऔΓࠐΉ͜ͱͰɺٕज़తෛ࠴Λ ղফͭͭ͠ஈ֊తʹ৽ϓϩδΣΫτଆ΁Ҡߦ͍ͯ͠Δ w $PODVSSFODZͳͲͷ৽͍ٕ͠ज़ελοΫʹ͍ͭͯ͸ɺӡ༻ϙϦγʔ΍ ΩϟονΞοϓࢿྉΛ੔උͯ͠ಋೖΛ࢝Ί͍ͯΔ
w ௕ظతʹଞϓϥοτϑΥʔϜ΋ؚΊͨϞϊϦϙδτϦԽ΋ݕ౼ प೥Λݟਾ͑ɺ͞ΒʹਐԽ͢Δ"#&."΁

ABEMA iOS 大規模プロジェクトにおける段階的な技術刷新 / ABEMA iOS Tec...

ABEMA iOS 大規模プロジェクトにおける段階的な技術刷新 / ABEMA iOS Technology Upgrade

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