4000のワーニングと戦え！これは警告だ！ / 4000 Warnings

by Hiron

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ͷϫʔχϯάͱઓ͑ ʂ   ͜Ε͸ܯࠂͩ ʂ .PCJMF"DU04","

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ࣗݾ঺հ w ͻΖΜʢҰٶߒڭʣ w 5XJUUFS (JU)VC 2JJUB   4MJEF4IBSF 4QFBLFS%FDL  ˠIJSPOZUJD w גࣜձࣾ.FUB.P+Jʢಙౡۈ຿ʣ

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ࠓ೥ͷग़དྷࣄ IUUQTNPOFZGPSXBSEDPNFOHJOFFST@CMPHPQUJPOBM

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ࠓ೥ͷग़དྷࣄ ඇৗʹେ͖ͳαΠζͷ13Ͱ͋ͬͨ͜ͱ΍ɺഁյతมߋ͕ߦΘΕͨ4XJGU΁ͷରԠͩͬͨ͜ͱɺͦ΋ ͦ΋ݹ͔͘Βӡ༻͞Ε͍ͯΔϓϩμΫτͰ͋Δ͕Ώ͑ͷେྔͷܯࠂΛશͯ௵͖͠Ε͓ͯΒͣɺͦͷ·· ຒ΋Εͯ͠·ͬͨͱ͔͠ݴ͍Α͏͕ͳ͘ɺͱͯ΋ஏ͔͍ͣ͠ݶΓͰ͢ɻ IUUQTNPOFZGPSXBSEDPNFOHJOFFST@CMPHPQUJPOBM

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Θ͔Δʙ

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w ࣮͸͜ͷ͜ΖɺฐࣾͷϓϩμΫτ΋  ܯࠂ͕࢒ͬͨ··ʹͳ͍ͬͯͨ  ʢͨͩ͠ɺ0CKFDUJWF$ʣ w Ұ౓͸ܯࠂΛ΄΅θϩʹ͍ͯͨ͠ͷ͕ͩɺ  9DPEFͷόʔδϣϯΞοϓΛڥʹɺ  ͍ͭͷؒʹ΍Β૿͍͑ͯͨʢݸʣ

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IUUQTUXJUUFSDPN@NPOPTUBUVT

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ͦͷ௨Γͩʜʂ

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ͬͦ͘͞ܯࠂআڈʹͱΓ͔͔Δ ͱ͸͍͑ w ܯࠂআڈ͚ͩߦ͏·ͱ·ͬͨ࡞ۀظؒ͸֬อͰ͖ ͦ͏ʹͳ͍ͷͰɺ߹ؒͰͪΐͪ͜ΐ͜࡞ۀ w νʔϜϝϯόʔؒͷԹ౓ࠩ ܯࠂআڈΛ੝Γ্͛Δඞཁ͋Γʂ

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4MBDLʹνϟϯωϧΛ࡞ͬͨ

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ܯࠂ਺ͷભҠΛՄࢹԽ

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ܯࠂΛফͬͯ͢Ͳ͏͍͏͜ͱʁ w ܯࠂˠจ๏తʹ͸ؒҧ͍ͬͯͳ͍͕ɺϓϩάϥ ϜϛεͷՄೳੑ͕͋Δ෦෼ͷࢦఠ w ܯࠂΛফ͢ˠ໰୊͕͋Ε͹मਖ਼͢Δɻ  ͳ͚Ε͹ͦ͜ʹ໰୊͕ͳ͍͜ͱΛҙࢥදࣔ͢Δɻ

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ҙࢥදࣔͷྫ UISwitch *hideSw = ... if (!hideSw.on != [defaults boolForKey:@"visible"]) { ... } if (!(hideSw.on != [defaults boolForKey:@"visible"])) ͷؒҧ͍͡Όͳ͍ͷʁͬͯ৺഑͞Ε͍ͯΔ Logical not is only applied to the left hand side of this comparison ˞9DPEFͰ͸͜ͷྫͰ͸ܯࠂ͕ग़·ͤΜͰͨ͠ UISwitch *hideSw = ... if ((!hideSw.on) != [defaults boolForKey:@"visible"]) { ... } ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹʜͷͰ ΧοίΛ͚ͭͯͦ͏͡Όͳ͍ͱҙࢥදࣔ

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ॱௐʹܯࠂ਺ΛݮΒ͍ͯͨ͠ͷ͕ͩʜ

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9DPEF΁Ξοϓσʔτ

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9DPEF΁Ξοϓσʔτ ܯࠂ਺͕Λ௒͑ͨʂ Χϯετ

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*NQMJDJUSFUBJOPGTFMGXJUIJOCMPDLT w self͕҉໧తʹڧࢀর͞ΕΔΑɺͱ͍͏ܯࠂ w ΫϥεͷΠϯελϯεม਺ΛϒϩοΫͷதͰࢀর ͍ͯ͠Δͱ͜ΖͰग़Δ w ॥؀ࢀরͷૣظݕग़ʹ໾ཱͭ

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*NQMJDJUSFUBJOPGTFMGXJUIJOCMPDLT @interface ViewController : UIViewController { WaitView *_waitView; } ... @end ΫϥεͷΠϯελϯεม਺ ˞ݱࡏ͸ɺΠϯελϯεม਺͸࢖Θͣʹɺ  ϓϩύςΟΛ࢖͏͜ͱ͕ਪ঑͞Ε͍ͯ·͢ɻ

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*NQMJDJUSFUBJOPGTFMGXJUIJOCMPDLT [AsyncUtils performActionOnMainThread:^{ _waitView.hidden = NO; }]; ϒϩοΫͷதͰ  Πϯελϯεม਺Λࢀর _waitView͕ڧࢀর͞ΕΔͷͰ͸ͳͯ͘ɺ  self͕ڧࢀর͞ΕΔ [AsyncUtils performActionOnMainThread:^{ self->_waitView.hidden = NO; }]; self->Λิ͑͹ɺҙࢥ දࣔʹΑΓܯࠂΛফͤΔ

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ͳͥ݅΋ w 6*εϨουͰಉظతʹ࣮ߦ͢ΔϢʔςΟϦςΟϝ ιουΛ࡞͍ͬͯͨʢ4XJGUͳΒ@noescapeʣ w ίϯύΠϥ͕ಉظత͔Ͳ͏͔Θ͔Βͳ͍ͷͰɺ͢ ΂ͯܯࠂ͕ग़Δ w ͬ͟ͱݟͯɺͱ͘ʹ໰୊ͳ͍Օॴ͕ଟ͍

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͜ͷܯࠂɺͲ͏ղܾ͢Δ͔ʁ "Ҋ໛ൣతͳղܾࡦʢ݅΋ͳ͚Ε͹ʣ w ܯࠂ͕ग़͍ͯΔՕॴΛਓ͕ؒݟͯ  ໰୊͕ͳ͚Ε͹self->Λิ͏ w ղܾʹ͕͔͔࣌ؒΓ͗ͯ͢ɺ  େྔͷܯࠂঢ়ଶ͕͋ͨΓ·͑ʹͳͬͯ͠·͏৺഑

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͜ͷܯࠂɺͲ͏ղܾ͢Δ͔ʁ #Ҋ͜ͷܯࠂ͸ࣺͯΔ w ϓϩδΣΫτઃఆͰ*NQMJDJUSFUBJOPGTFMG XJUIJOCMPDLTͷܯࠂΛ/Pʹ͢Δ w ࠓޙ࣮૷͢Δ෦෼Ͱ΋ܯࠂ͕ग़ͳ͍

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͜ͷܯࠂɺͲ͏ղܾ͢Δ͔ʁ $Ҋैདྷͷίʔυʹ͸໨ΛᛉΔ w ద౰ͳεΫϦϓτΛॻ͍ͯɺ  ܯࠂ͕ग़͍ͯΔͱ͜ΖʹػցతʹTFMGΛิ͏ w ҙࢥදࣔͨ͜͠ͱʹͳΓɺ͜Ε͸ਖ਼͍͠ͱ͍͏  ʮ͓๽෇͖ʯΛ༩͑ͯ͠·͏͜ͱʹͳΔ w ࠓޙͷ࣮૷Ͱ͸ܯࠂ͕ػೳ͢Δ

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͜ͷܯࠂɺͲ͏ղܾ͔ͨ͠ʁ w "Ҋͱ$Ҋͷ྆ํΛ෦෼࠾༻ͨ͠ɻ w ֬ೝ͢Δҙࢥͷ͋Δ୲౰ऀʹ͸֬ೝͯ͠΋Βͬͯ खಈͰself->Λิͬͯ΋Β͏ɻ w ͦΕҎ֎ͷ෦෼͸ɺػցతʹself->Λิ͏ɻ ʢΑ͘ͳ͍͜ͱͱೝ্ࣝͨ͠Ͱ૬ஊͷ݁Ռʣ

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ͦΜͳ͜Μͳ  ͋ͬͯ

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ܯࠂ਺ʹ౸ୡ

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ͦͷޙͷܯࠂΛ૿΍͞ͳ͍ͨΊʹ w ܯࠂΛΤϥʔѻ͍ʹ͢Δʁ  ʢ5SFBU8BSOJOHTBT&SSPSTΛ:FTʹʣ ‎σόοά࣌ʹ൥Θ͍͠ͷͰ͸ʁ w $*ͰͷϏϧυ࣌ʹݶΓɺܯࠂΛΤϥʔѻ͍ʹ w ܯࠂΛग़ͨ͠··ʹ͢Δͱ$*ʹౖΒΕΔ

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·ͱΊ w ܯࠂআڈͷϞνϕʔγϣϯΞοϓઓུ w ܯࠂΛফ͢ͱ͸ʁˠίʔυʹର͢Δҙࢥදࣔ w 9DPEFͷόʔδϣϯΞοϓʹ൐͏݅ͷܯࠂ  ϝϦοτɾσϝϦοτΛݕ౼ͯ͠ରॲ w ܯࠂΛ૿΍͞ͳ͍ͨΊͷ޻෉

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IUUQTUPLVTIJNBBQQDPOOQBTTDPNFWFOU ݄೔ʹ͸ୈճΛ༧ఆʂ