Dependency Injection in Swift2

LZPCBTIJTXJGU !HPNJ@OJOHFO %FQFOEFODZ*OKFDUJPOJO4XJGU

ࣗݾ঺հ ઃఆɿ๭ϥϏοτϋ΢εࣾͰಇࣾ͘ச೥ੜ ɾ+BWBόοΫΤϯυγεςϜอकɾػೳ։ൃ ɾJ04ʢ4XJGUʣΞϓϦ৽ن։ൃ ɾ4DBMB +BWBͰద౰ʹπʔϧΛ࡞ͬͨΓͳͲ ɾ޷͖ͳݴޠ͸+BWB 4DBMBʢ4DBMBॻ͖͍ͨʣ
ɾ޷͖ͳ࡞඼͸͝஫จ͸͏͗͞Ͱ͔͢ ɾJ04ʢ4XJGUʣ։ൃܦݧ൒೥͔͠΍͍ͬͯͳ͍ऑฌɾૉਓ 🐰͕࣌ؒͳ͍ͷͰࣗݾ঺հ͸ׂѪ͠·͢🐰 !HPNJ@OJOHFO

ࠓ೔࿩͢಺༰ தʙେن໛4XJGU։ൃʹ͓͚ΔґଘΦϒδΣΫτղܾͷํ๏Λߟ͑Δ ʢ👇͜ͷ಺༰ɺ෼ͰऴΘΔͷ͔ʁʣ %* %FQFOEFODZ*OKFDUJPO ͱ͸ʁ %*ͷجຊతͳ࿩ɿ஌͍ͬͯΔਓ͕ଟ͔ͬͨΒলུ༧ఆ ίϯςφ
4XJOKFDU Λ༻͍ͨ%* 4XJOKFDUͷ%*ίϯςφΛ༻͍ͨಈత%*ͷ࿩ 4XJGUʹ͓͚Δ੩త%* $BLF1BUUFSO෩ͷ੩త%*Λ4XJGUͰͳΜͱ͔࣮ݱ͢Δ࿩

%FQFOEFODZ*OKFDUJPOͱ͸ʁ

%FQFOEFODZ*OKFDUJPOͱ͸ʁ $MJFOU͕4FSWJDFΛར༻࣮ͯ͠૷͞ΕΔ৔߹Λ૝ఆ͠Α͏
⚡ 4FSWJDFͷ࣮૷͕૿͑ͨΓɺࠩ͠มΘΔ͜ͱ͕༧૝͞ΕΔ

$MJFOU͕4FSWJDFΛར༻࣮ͯ͠૷͞ΕΔ৔߹Λ૝ఆ͠Α͏
⚡$MJFOU͕ґଘ͢Δ4FSWJDFΛࠩ͠ସ͑ΔͨΊʹ͸ $MJFOUʹมߋΛೖΕΔඞཁ͕͋Δ %FQFOEFODZ*OKFDUJPOͱ͸ʁ ࣮૷࣌ʹґଘΦϒδΣΫτΛબ୒

ґଘΦϒδΣΫτΛίϯετϥΫλ͔Βࠩ͠ࠐΉ %FQFOEFODZ*OKFDUJPOͱ͸ʁ

%FQFOEFODZ*OKFDUJPOͱ͸ʁ ґଘΦϒδΣΫτΛͳΜΒ͔ͷํ๏Λ࢖ͬͯ֎෦͔Βࠩ͠ࠐΉܗʹ͢Δ ͜ͱΛ%FQFOEFODZ*OKFDUJPOͱ͍͏ ɾ ίϯετϥΫλ͔Βͷ஫ೖʢίϯετϥΫλɾΠϯδΣΫγϣϯʣ ɾ ηολʔ͔Βͷ஫ೖʢηολʔɾΠϯδΣΫγϣϯʣ ɾ ϑΟʔϧυ΁ͷ஫ೖʢϑΟʔϧυɾΠϯδΣΫγϣϯʣ
ɾ ϛοΫεΠϯʹΑΔ஫ೖʢϛοΫεΠϯɾΠϯδΣΫγϣϯʣ ͳͲ ΍͍ͬͯΔ͜ͱ͸ґଘΦϒδΣΫτΛ֎෦͔Βࠩ͠ࠐΜͰΔ͚ͩ

ෳࡶͳγεςϜͰ͸ͨ͘͞ΜͷґଘΦϒδΣΫτΛղܾ͢Δඞཁ͕͋Δ ഑ઢͷ໰୊ͱ͸ʁ

࣮ࡍʹى͜Γ͏Δέʔε •  -PHJO7JFX$POUSPMMFS͸ɺ6TFS4FSWJDFʹґଘ͢Δ •  6TFS4FSWJDFͷ࣮૷͸ɺ6TFS3FQPTJUPSZʹґଘ͢Δ •  6TFS3FQPTJUPSZͷ࣮૷͸ɺ"QQ"QJ$MJFOUʹґଘ͢Δ •  "QQ"QJ$MJFOUͷ࣮૷͸ɺ)UUQ$MJFOUʹґଘ͢Δ
ϞδϡʔϧԽͱ%*ʹΑΓ੹຿෼཭͕Ͱ͖͕ͨɺΫϥΠΞϯτίʔυ͔ ΒαʔϏεͷΠϯελϯεΛऔಘ͢Δͷ͕೉͘͠ͳͬͯ͠·ͬͨ😇 ഑ઢͷ໰୊ͱ͸ʁ

ίϯςφʢ4XJOKFDUʣΛ༻͍ͨ%*

ίϯςφΛ༻͍ͨ%* %*ίϯςφͱ͸ʁ •  ͋Β͔͡ΊɺίϯςφʹґଘΦϒδΣΫτΛొ࿥͓ͯ͘͠ •  ར༻͍ͨ͠ͱ͖ʹίϯςφ͔ΒऔΓग़͢ ຊ౰ʹ৭ʑ࡟͗མͱͯ͠·ͱΊΔͱ͜Μͳ͔Μ͡ ൃද࣌ؒ̑෼͔͠ͳ͍͠Ͷʢ਒͑੠ʣ

ίϯςφΛ༻͍ͨ%* ҎԼͷΑ͏ͳؔ܎ͷΦϒδΣΫτ͕͋Δͱ͢Δ
"#$ͷΠϯελϯεΛಘΔʹ͸ɺ"# "ͷΠϯελϯε͕ඞཁͰ͋Δ

ίϯςφΛ༻͍ͨ%* 4XJOKFDUͷ$POUBJOFSΛ༻͍ͨґଘΦϒδΣΫτղܾ
ɾొ࿥ࡁΈΦϒδΣΫτͷΠϯελϯε͸औಘͰ͖Δ ɾͦ͏Ͱͳ͍΋ͷ͸ɺOJM͕ฦͬͯ͘Δ

ίϯςφΛ༻͍ͨ%* 1MBZHSPVOEͰ࣮ࡍʹࢼͤΔ΋ͷΛ(JU)VCʹ͍͋͛ͯ·͢ ໘ന͍ͳͱࢥͬͨਓ͸ɺDMPOFͯ͠ಈ͔ͯ͠Έͯཉ͍͠Ͱ͢ ``` git clone [email protected]:53ningen/SwiftDISample.git SwinjectPlayground
```

4XJGUʹ͓͚Δ੩త%*

ࢀߟจݙ ͔͜͜Βͷ಺༰͸ҎԼͷهࣄΛࢀߟʹͯ͠ॻ͔Ε͍ͯ·͢ IUUQBDRVJIJSFNFEFQFOEFODZJOKFDUJPOXJUIUIF DBLFQBUUFSOJOTXJGU େมΘ͔Γ΍͍͢಺༰Ͱɺ͔ͭ୹͍ͷͰɺڵຯΛ࣋ͬͨਓ͸ϦϯΫઌΛ ͝ཡʹͳΔͱྑ͍ͱࢥ͍·͢

αϯϓϧίʔυ ·ͨҎԼʹ1MBZHSPVOEͰಈ͘αϯϓϧΛαϯϓϧίʔυΛॻ͍ͯ ͋Γ·͢ɻ IUUQTHJTUHJUIVCDPNOJOHFOCBCEDBG ಈ͔͠ͳ͕Β࿩Λฉ͍͍͚ͯͨͩΔͱཧղ͕͠΍͍͢ͱࢥ͍·͢ɻ ΞΫηεम০ࢠΛ෇͚ɺϑΝΠϧʹ෼ׂ͍ͯ͠Δ9DPEFϓϩδΣΫτ ൛΋͋Γ·͢ͷͰDMPOFͯ͠ಈ͔ͯ͠Έ͍ͯͩ͘͞
IUUQTHJUIVCDPNOJOHFO4XJGU$BLF

લఏͱͳΔঢ়گ HFU" Λ࣋ͭ"ͱHFU"# Λ࣋ͭ"#͕ఆٛͯ͋͠Δ

4XJGUͰͷ੩త%*ͷํ๏ྫ ͦΕͧΕͷϞδϡʔϧʹର͢Δ$PNQPOFOUΛఆٛ

4XJGUͰͷ੩త%*ͷํ๏ྫ $PNQPOFOUΛ߹੒͢Δ͜ͱʹΑΓ഑ઢ͕׬ྃ͢Δ

·ͱΊ

%FQFOEFODZ*OKFDUJPOJO4XJGU 4XJOKFDUΛ༻͍ͨಈత%* •  ಈత%*͸ɺΑ͏΍͘࢖͑ͦ͏ͳίϯςφ͕ੜ·Ε͖ͯͨ •  (PPHMF(VJDFͷΑ͏ͳ΋ͷͱ͸ɺ·ͩ΄Ͳԕ͍ɺ࣮ݱ΋೉ͦ͠͏ •  ݱ࣮తʹߟ͑Δͱͨ͠Βͪ͜ΒΛ࠾༻͢Δ͜ͱʹͳΔ͔ʁ
$BLF1BUUFSOͬΆ͍΋ͷΛ༻͍ͨ੩త%* •  QSPUPDPMFYUFOTJPOʹΑΓ੩త%*͕ߦ͑Δ •  ͔͠͠ɺ೉ղͳ$BLF1BUUFSO͕༨ܭෳࡶʹͳͬͨ΋ͷ •  ༨ܭͳϥΠϒϥϦʹґଘ͠ͳ͍ɺ࣮૷Ϋϥε͕࿐ग़͠ͳ͍఺͸ྑ͍

͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ࠙਌ձͰ͜Μͳ͓࿩͕͍ͨ͠ •  7JFX$POUSPMMFSΛΧΦεʹ͠ͳ͍ͨΊͷऔΓ૊Έ •  ϓϨθϯςʔγϣϯ૚ͷঢ়ଶ؅ཧ • 
ΑΓ҆શͳΫϥΠΞϯτίʔυ͕ॻ͚ΔΑ͏ͳϞσϧઃܭ •  Ϗϧυ଎౓վળͷͨΊͷऔΓ૊Έʢ$BSUIBHFUBSHFU෼ׂͳͲʣ Կ͔͠Βྑ͍ղܾࡦΛ͍࣋ͬͯΔํɺ͓࿩Λ͓ฉ͔͍ͤͯͩ͘͞

Dependency Injection in Swift2

Dependency Injection in Swift2

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LZPCBTIJTXJGU !HPNJ@OJOHFO %FQFOEFODZ*OKFDUJPOJO4XJGU

ࣗݾ঺հ ઃఆɿ๭ϥϏοτϋ΢εࣾͰಇࣾ͘ச೥ੜ ɾ+BWBόοΫΤϯυγεςϜอकɾػೳ։ൃ ɾJ04ʢ4XJGUʣΞϓϦ৽ن։ൃ ɾ4DBMB +BWBͰద౰ʹπʔϧΛ࡞ͬͨΓͳͲ ɾ޷͖ͳݴޠ͸+BWB 4DBMBʢ4DBMBॻ͖͍ͨʣ

ࠓ೔࿩͢಺༰ தʙେن໛4XJGU։ൃʹ͓͚ΔґଘΦϒδΣΫτղܾͷํ๏Λߟ͑Δ ʢ👇͜ͷ಺༰ɺ෼ͰऴΘΔͷ͔ʁʣ %* %FQFOEFODZOKFDUJPO ͱ͸ʁ %ͷجຊతͳ࿩ɿ஌͍ͬͯΔਓ͕ଟ͔ͬͨΒলུ༧ఆ ίϯςφ

%FQFOEFODZ*OKFDUJPOͱ͸ʁ

%FQFOEFODZ*OKFDUJPOͱ͸ʁ $MJFOU͕4FSWJDFΛར༻࣮ͯ͠૷͞ΕΔ৔߹Λ૝ఆ͠Α͏

$MJFOU͕4FSWJDFΛར༻࣮ͯ͠૷͞ΕΔ৔߹Λ૝ఆ͠Α͏

ґଘΦϒδΣΫτΛίϯετϥΫλ͔Βࠩ͠ࠐΉ %FQFOEFODZ*OKFDUJPOͱ͸ʁ

ෳࡶͳγεςϜͰ͸ͨ͘͞ΜͷґଘΦϒδΣΫτΛղܾ͢Δඞཁ͕͋Δ ഑ઢͷ໰୊ͱ͸ʁ

ෳࡶͳγεςϜͰ͸ͨ͘͞ΜͷґଘΦϒδΣΫτΛղܾ͢Δඞཁ͕͋Δ ഑ઢͷ໰୊ͱ͸ʁ

࣮ࡍʹى͜Γ͏Δέʔε •  -PHJO7JFX$POUSPMMFS͸ɺ6TFS4FSWJDFʹґଘ͢Δ •  6TFS4FSWJDFͷ࣮૷͸ɺ6TFS3FQPTJUPSZʹґଘ͢Δ •  6TFS3FQPTJUPSZͷ࣮૷͸ɺ"QQ"QJ$MJFOUʹґଘ͢Δ •  "QQ"QJ$MJFOUͷ࣮૷͸ɺ)UUQ$MJFOUʹґଘ͢Δ

ίϯςφʢ4XJOKFDUʣΛ༻͍ͨ%*

ίϯςφΛ༻͍ͨ%* %*ίϯςφͱ͸ʁ •  ͋Β͔͡ΊɺίϯςφʹґଘΦϒδΣΫτΛొ࿥͓ͯ͘͠ •  ར༻͍ͨ͠ͱ͖ʹίϯςφ͔ΒऔΓग़͢ ຊ౰ʹ৭ʑ࡟͗མͱͯ͠·ͱΊΔͱ͜Μͳ͔Μ͡ ൃද࣌ؒ̑෼͔͠ͳ͍͠Ͷʢ਒͑੠ʣ

ίϯςφΛ༻͍ͨ%* ҎԼͷΑ͏ͳؔ܎ͷΦϒδΣΫτ͕͋Δͱ͢Δ

ίϯςφΛ༻͍ͨ%* 4XJOKFDUͷ$POUBJOFSΛ༻͍ͨґଘΦϒδΣΫτղܾ

ίϯςφΛ༻͍ͨ%* 1MBZHSPVOEͰ࣮ࡍʹࢼͤΔ΋ͷΛ(JU)VCʹ͍͋͛ͯ·͢ ໘ന͍ͳͱࢥͬͨਓ͸ɺDMPOFͯ͠ಈ͔ͯ͠Έͯཉ͍͠Ͱ͢ ``` git clone [email protected]:53ningen/SwiftDISample.git SwinjectPlayground

4XJGUʹ͓͚Δ੩త%*

ࢀߟจݙ ͔͜͜Βͷ಺༰͸ҎԼͷهࣄΛࢀߟʹͯ͠ॻ͔Ε͍ͯ·͢ IUUQBDRVJIJSFNFEFQFOEFODZJOKFDUJPOXJUIUIF DBLFQBUUFSOJOTXJGU େมΘ͔Γ΍͍͢಺༰Ͱɺ͔ͭ୹͍ͷͰɺڵຯΛ࣋ͬͨਓ͸ϦϯΫઌΛ ͝ཡʹͳΔͱྑ͍ͱࢥ͍·͢

αϯϓϧίʔυ ·ͨҎԼʹ1MBZHSPVOEͰಈ͘αϯϓϧΛαϯϓϧίʔυΛॻ͍ͯ ͋Γ·͢ɻ IUUQTHJTUHJUIVCDPNOJOHFOCBCEDBG ಈ͔͠ͳ͕Β࿩Λฉ͍͍͚ͯͨͩΔͱཧղ͕͠΍͍͢ͱࢥ͍·͢ɻ ΞΫηεम০ࢠΛ෇͚ɺϑΝΠϧʹ෼ׂ͍ͯ͠Δ9DPEFϓϩδΣΫτ ൛΋͋Γ·͢ͷͰDMPOFͯ͠ಈ͔ͯ͠Έ͍ͯͩ͘͞

લఏͱͳΔঢ়گ HFU" Λ࣋ͭ"ͱHFU"# Λ࣋ͭ"#͕ఆٛͯ͋͠Δ

4XJGUͰͷ੩త%*ͷํ๏ྫ ͦΕͧΕͷϞδϡʔϧʹର͢Δ$PNQPOFOUΛఆٛ

4XJGUͰͷ੩త%*ͷํ๏ྫ $PNQPOFOUΛ߹੒͢Δ͜ͱʹΑΓ഑ઢ͕׬ྃ͢Δ

·ͱΊ

%FQFOEFODZOKFDUJPOJO4XJGU 4XJOKFDUΛ༻͍ͨಈత% •  ಈత%*͸ɺΑ͏΍͘࢖͑ͦ͏ͳίϯςφ͕ੜ·Ε͖ͯͨ •  (PPHMF(VJDFͷΑ͏ͳ΋ͷͱ͸ɺ·ͩ΄Ͳԕ͍ɺ࣮ݱ΋೉ͦ͠͏ •  ݱ࣮తʹߟ͑Δͱͨ͠Βͪ͜ΒΛ࠾༻͢Δ͜ͱʹͳΔ͔ʁ

͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ࠙਌ձͰ͜Μͳ͓࿩͕͍ͨ͠ •  7JFX$POUSPMMFSΛΧΦεʹ͠ͳ͍ͨΊͷऔΓ૊Έ •  ϓϨθϯςʔγϣϯ૚ͷঢ়ଶ؅ཧ •