ReactNativeで大規模アプリを作るときに気を付けたいこと
by
kazuhiro hara
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3FBDU/BUJWFͰ େنΞϓϦΛ࡞Δͱ͖ʹ ؾΛ͚͍ͨ͜ͱ IUNMK8FCϓϥοτϑΥʔϜ෦ୈճษڧձ
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˞ຊηογϣϯग़ԋऀͷݟղͰ͋Γɺ ɹग़ԋऀ͕ॴଐ͢Δ৫ͷެࣜݟղͰ ɹ͋Γ·ͤΜ
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ݪҰߒɹɹ!LBSB@E
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$MPKVSF4DSJQUͰ &MFDUSPOΞϓϦέʔγϣϯΛ ࡞ΔͨΊͷελʔτΩοτϓϥοτϗʔϜ IUUQEFTDKPQPSH chochoi Ϗϧυπʔϧͷґଘͳ͠Ͱ $MPKVSF4DSJQUϕʔεͷ/PEFKTίϚϯυΛ ࡞ΕΔπʔϧ IUUQTHJUIVCDPNLBSBEDIPDIPJ
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ຊͷߏ લఏ Ұ൪͍ͩ͡ͳϙΠϯτ ΞϓϦ༷ͷΈΛͲ͏࡞Δ͔ ٕज़ߏΛܾΊΑ͏ σʔλ εςʔτ͓Αͼͦͷଞ ͷઃܭ ίϯϙʔωϯτͱঢ়ଶભҠ
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1 લఏ
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ࡢ΄ͱΜͲͷ࣌ؒΛ 3FBDU/BUJWFϚϯͱͯ͠ա͝͠·ͨ͠
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3FBDU/BUJWFʹݶΒͳ͍ ೖ͍ͬͯ·͢
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͜Μͳલఏ͕͋Δ߹ͷϊϋ ෳਓͰ։ൃ ͱʹ͔͘ը໘͕ଟ͘ɺભҠෳࡶ "OESPJEɺJ04ͱʹಉ͡ߏɾߏ طʹܾ·͍ͬͯΔཁ݅ͷத͔Β༷͕ܾ·Δ
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ϓϩδΣΫτେ͖͍ͱׂ͞·͟· ը໘ઃܭɾભҠઃܭ 6*ɾϏδϡΞϧσβΠϯ ΞϓϦέʔγϣϯͷ։ൃઃܭ ΞϓϦέʔγϣϯͷ։ൃͱྔ࢈ "1*ͷ։ൃ୲ αʔόʔͷΠϯϑϥ୲
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ϓϩδΣΫτେ͖͍ͱׂ͞·͟· ը໘ઃܭɾભҠઃܭ 6*ɾϏδϡΞϧσβΠϯ ΞϓϦέʔγϣϯͷ։ൃઃܭ ΞϓϦέʔγϣϯͷ։ൃͱྔ࢈ "1*ͷ։ൃ୲ αʔόʔͷΠϯϑϥ୲
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ϑϨʔϜϫʔΫ ຊηογϣϯʹ͓͚Δ ΞϓϦέʔγϣϯ͜͏͋Δ͖ͱ͍͏ࢦ Ͳ͏͍͏෩ʹ։ൃ͢Ε͍͍͔ͷϧʔϧ ্هΛ࣮ݱ͢ΔͨΊͷٕज़܈
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2 Ұ൪͍ͩ͡ͳϙΠϯτ
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3FBDU/BUJWFΛ͏ͱ͍͏બ
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֮ޛΛܾΊΑ͏
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બࢶ͍Ζ͍Ζ͋Δ ωΠςΟϒͰ J04ɺ"OESPJE ωΠςΟϒ6*ίϯϙʔωϯτϕʔεܥ 3FBDU/BUJWFɺ8FFYɺ/BUJWF4DSJQU 8FC7JFXϕʔεܥ $PSEPWBɺͦͷଞ$PSEPWBϕʔεܥ ͦͷଞͷٕज़Ͱ 6OJUZɺ9BNBSJOɺ%FMQIJFUD
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3FBDU/BUJWFͲ͏͍͏ͷͳΒΦτΫʁ ͺͺͬͱ࡞Γ͍ͨܥ +BWB4DSJQUΤϯδχΞ͕ϝΠϯܥ ඪ४ͷωΠςΟϒ6*ίϯϙʔωϯτΛத৺ͱͨ͠ ϑΥʔϜͷछྨ͕ଟ͍ܥ ใද͕ࣔϝΠϯ "OESPJEͱJ04͕ಉ͡ߏɾߏܥ
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3 ΞϓϦ༷ͷΈΛͲ͏࡞Δ͔
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ΞϓϦʹ͍ͭͯເ͕͕Δʜɻ Γ͍ͨ͜ͱ͍ͬͺ͍ ເ͍ͬͺ͍ ͢Β͍͠Ϣʔβʔମݧ͍ͬͺ͍ ෳࡶ͍ͬ͞ͺ͍
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3FBDU/BUJWFͷಛੑΛ ڞ༗͢Δͷ͍͠
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໌ࣔతͳΈΛ ڞ༗͠·͠ΐ͏
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ϓϩηεͱͯ͠ͷ ϑϨʔϜϫʔΫ
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ΞϓϦʹ͍ͭͯߟ͑ΔΈ͕େࣄ શମͷํੑΛܾΊΔΈΛҰ෦ܾΊɺ ͦͷΈͷதͰࡉ͔͍༷ΛܾΊ͍ͯ͘ ༷ͷෳࡶ͕͞ഒʹͳΔͱɺ ࣮ͷෳࡶ͞ࢦؔతʹ্͕Δ શͯͷ༷ΛܾΊ͔ͯΒΞϓϦͷ։ൃҠΔͷͰͳ͘ɺ جຊతͳ෦ͷ༷͔ΒϑϨʔϜϫʔΫʢΈʣΛܾΊͯ ͦͷߟ͑ํͰΓͷ༷Λߟ͍͑ͯ͘ ։ൃϦεΫΛ༧ଌ͍͢͠ ༷ࡦఆ୲ʹσβΠϯ୲ʹཧղͯ͠Β͏
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ΞϓϦʹ͍ͭͯߟ͑ΔΈ͕େࣄ શମͷํੑΛܾΊΔΈΛҰ෦ܾΊɺ ͦͷΈͷதͰࡉ͔͍༷ΛܾΊ͍ͯ͘ ΞϓϦاը
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ΞϓϦʹ͍ͭͯߟ͑ΔΈ͕େࣄ શମͷํੑΛܾΊΔΈΛҰ෦ܾΊɺ ͦͷΈͷதͰࡉ͔͍༷ΛܾΊ͍ͯ͘ ΞϓϦاը ΞϓϦཁ݅
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ΞϓϦʹ͍ͭͯߟ͑ΔΈ͕େࣄ શମͷํੑΛܾΊΔΈΛҰ෦ܾΊɺ ͦͷΈͷதͰࡉ͔͍༷ΛܾΊ͍ͯ͘ ΞϓϦاը ΞϓϦཁ݅ ΞϓϦ༷
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ΞϓϦʹ͍ͭͯߟ͑ΔΈ͕େࣄ શମͷํੑΛܾΊΔΈΛҰ෦ܾΊɺ ͦͷΈͷதͰࡉ͔͍༷ΛܾΊ͍ͯ͘ ΞϓϦاը ΞϓϦཁ݅ ΞϓϦ༷ Ξ ϓ Ϧ ઃ ܭ
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ΞϓϦʹʹ͍ͭͯߟ͑ΔΈ͕େࣄ શମͷํੑΛܾΊΔΈΛҰ෦ܾΊɺ ͦͷΈͷதͰࡉ͔͍༷ΛܾΊ͍ͯ͘ ΞϓϦاը ΞϓϦཁ݅ ΞϓϦ༷ Ξ ϓ Ϧ ઃ ܭ ΞϓϦ։ൃ
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ΞϓϦʹʹ͍ͭͯߟ͑ΔΈ͕େࣄ શମͷํੑΛܾΊΔΈΛҰ෦ܾΊɺ ͦͷΈͷதͰࡉ͔͍༷ΛܾΊ͍ͯ͘ ΞϓϦاը ΞϓϦཁ݅ ΞϓϦ༷ Ξ ϓ Ϧ ઃ ܭ ΞϓϦ։ൃ ϑ Ϩ * Ϝ ϫ * Ϋ ࡦ ఆ
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͜ͷܗɺݟͨ͜ͱ͕͋Δʜɻ ΞϓϦ༷ Ξ ϓ Ϧ ઃ ܭ ΞϓϦ։ൃ ϑ Ϩ * Ϝ ϫ * Ϋ ࡦ ఆ
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͜ͷܗɺݟͨ͜ͱ͕͋Δʜɻ
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ΰʔϧσϯϋʔϕετࣾͷϩΰͩ ΰʔϧσϯϋʔϕετࣾ ೩͑Αυϥΰϯ ೩͑Ασϒΰϯ ϓϩδΣΫτ" εύϧλϯ9 ྶݬಓ࢜ ϙϦεɾετʔϦʔ ߳ߓࠃࡍܯ
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ΰʔϧσϯϋʔϕετܕ։ൃͷ͝ఏҊ େ Ұ෦ ͷ༷Λ·ͣࡦఆ ͦͷ༷Λ࣮ݱՄೳͳ ϑϨʔϜϫʔΫΛߟ͑Δ ϑϨʔϜϫʔΫΛ εςʔΫϗϧμʔʹڞ༗ ϑϨʔϜϫʔΫʹԊͬͯ ࡉ͔ͳ༷Λ࡞ ܁Γฦ͠ ΞϓϦ༷ Ξ ϓ Ϧ ઃ ܭ ΞϓϦ։ൃ ϑ Ϩ * Ϝ ϫ * Ϋ ࡦ ఆ
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ΰʔϧσϯϋʔϕετܕ։ൃͷϝϦοτ ༷ͱઃܭͷϓϩηε͕ٯస ঃʑʹߟ͑ํ͕ਁಁ͢Δ ྫ֎ύλʔϯ͕ى͖ʹ͍͘ ྔ࢈ମ੍Λ࡞Γ͍͢ ΞϓϦ༷ Ξ ϓ Ϧ ઃ ܭ ΞϓϦ։ൃ ϑ Ϩ * Ϝ ϫ * Ϋ ࡦ ఆ
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ΰʔϧσϯϋʔϕετܕ։ൃͷ՝ Ͳ͏߹ҙΛͱΔ͔ ্ཱ͕ͪΓͷ͞ ཁ݅Λ෴ࣗ͢ମʹऑ͍ ൚༻ϑϨʔϜϫʔΫΛ ࡞Γͨ͘ͳͬͯ͠·͏ ΞϓϦ༷ Ξ ϓ Ϧ ઃ ܭ ΞϓϦ։ൃ ϑ Ϩ * Ϝ ϫ * Ϋ ࡦ ఆ
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4 ٕज़ߏΛܾΊΑ͏
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ͤͳ࣌ظ ָ͠Έ͗͢ʹҙ
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DSFBUFSFBDUOBUJWFBQQͰ͡ΊΔ͔ SFBDUOBUJWFJOJUͰ͡ΊΔ͔ DSFBUFSFBDUOBUJWFBQQ FYQPͱ͍͏։ൃϏϧυڥʹ͔ͬΔͷָ͕ FYQPͷൣғΛӽ͑Δͱਏ͘ͳΔͷͰʁΘ͔Βͳ͍ SFBDUOBUJWFJOJU ࠷ݶͷϏϧυߏ
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3FBDU/BUJWFΞοϓάϨʔυͷ࣌ظʹҙ 3FBDU/BUJWF͙͢ʹόʔδϣϯ্͕͕Δ ΞοϓάϨʔυ؆୯Ͱͳ͍ όʔδϣϯ͕มΘΔͱσϑΥϧτͷϑΥϧμߏ͕ มΘΔ͜ͱ͋Δ react-native upgradeɺωΠςΟϒଆͷ্ॻ͖ʹҙ
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ٕज़ߏ ϑϩϯτΤϯυͰͷ ٕज़ߏΛܾΊ͓ͯ͘ͱɺ ֶश͕ਐΈ͍͢ ΦϨΦϨϑϨʔϜϫʔΫ͕ ٕज़ߏʹؚ·ΕΔͱɺ ཧղ͠ʹ͘͘ͳΔ ॏͶΔͱɺखް͘ͳΔ͕ɺ ಈ͖͕औΕͳ͘ͳΔ react-native-cli React Native React Navigation Redux Immutable.js Native Base
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5 σʔλ εςʔτ͓Αͼͦͷଞ ͷઃܭ
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σʔλͱίϯϙʔωϯτ͕ શͯΛܾΊ͍͖ͯ·͢
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σʔλͱϞσϧ 3FEVY·ΘΓ *NNVUBCMFKT w 3FDPSE͕ศརɻϞσϧͷΑ͏ͳͷΛ࡞ΕΔ 0CKFDUMPEBTI͔ɺ*NNVUBCMF0CKFDU*NNVUBCMFKT͔ w ͜͜Έ͕͔ΕΔͱ͜Ζ ઃఆϑΝΠϧͱͯ͠ͷ+40/ BQQMJDBUJPO@CBTJDKTPO ΞϓϦέʔγϣϯͷΦϒδΣΫτ ୯ͳΔγϯάϧτϯΦϒδΣΫτͰ͍͍͜ͱ͋Δ
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ใͷछྨͰ͚Α͏ ෆมใ ΞϓϦέʔγϣϯͷίʔυͱͯ͠อ࣋͢ΔΑ͏ͳใ جຊใ ΞϓϦέʔγϣϯͷઃఆใͱ͔ Ұ࣌తͳใ "KBYͰऔಘ͢Δใͱ͔ شൃੑͷใ ϑΥʔϜೖྗதͷεςʔτͱ͔
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6 ίϯϙʔωϯτͱঢ়ଶભҠ
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શͯεςʔτͷมԽͱ ίϯϙʔωϯτͷఆٛͰ͢
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ঢ়ଶભҠ 3FBDU/BUJWF3FEVYͳڥʹ͓͍ͯ 3FBDU/BWJHBUJPOΛ͍ͬͯΔͱɺ ը໘ͷભҠͱσʔλͷมߋͦΕ΄Ͳҧ͍͕ͳ͍ ϧʔςΟϯάʹΑΔঢ়ଶભҠ OBWεςʔτͷมߋ ը໘ʹ͓͚Δঢ়ଶભҠ Yεςʔτͷมߋ
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མͱ͠ࠐΈͷେࣄͳϙΠϯτ ΕΔը໘ͱด͡Δը໘ ελοΫφϏήʔγϣϯͷΑ͏ʹϖʔδΛߦ͖དྷ͢Δͷ ϞʔμϧͷΑ͏ʹΞΫγϣϯʹԠͯ͡։ด͢Δͷ ৗʹຊʹඞཁͳͷ͔Λߟ͑Δ ϞʔμϧͷதͰ͍Ζ͍ΖભҠͯ͠ʜͱ͔ Ұ෦͚ͩϦετʹͳͬͯͯԡ͢ͱಉ͡ը໘Ͱදࣔ͞ΕΔʜͱ͔
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ը໘ύλʔϯͱίϯϙʔωϯτ དͰఆٛࡁΈίϯϙʔωϯτΛΘͳ͍ ·ͱ·Γͷ͋Δίϯϙʔωϯτ Έ߹ΘͤΔ͜ͱͰը໘ύλʔϯΛ૿͢ ࣗͰͯ͢Λ࡞Ζ͏ͱࢥΘͳ͍͜ͱ ઃఆΦϒδΣΫτ͔ΒίϯϙʔωϯτΛੜ͢Δ ίϯϙʔωϯτϏϧμʔʹམͱ͠ࠐΊΔͱָ
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7 ·ͱΊ
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·ͱΊ େ͖͍نͷΞϓϦͰ3FBDU/BUJWFΛ ࠾༻͢Δͱ͖ɺڧ͍ҙࢤΛ ΰʔϧσϯϋʔϕετܕ։ൃΛ৺͕͚Α͏ ٕज़ߏΛΓ͗͢ͳ͍ εςʔτͷมԽͱίϯϙʔωϯτͷఆ͕ٛݤ σʔλͷઃܭʹண͠Α͏
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͋Γ͕ͱ͏͍͟͝·ͨ͠
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8 Α͋͘Δ࣭͝
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Α͋͘Δ࣭͝ 3FBDU/BUJWFͲͷఔΫϩεϓϥοτϗʔϜʁ நతͳҙຯͰશޓͱݴ͑·͢ ྆ϓϥοτϗʔϜͷશͯͷݟͨΛ౷Ұ͢ΔͷՄೳʁ ͍Βͷಓ͕͍ͬͯ·͢ ͦ͏Ͱͳͯ͘ݟͨͱతͱը໘ભҠΛ ڞ௨ʹ͢Δ͘Β͍ͷ΄͏͕͍͍