20170613_iOSLT_UIKitにおけるViewLifecycle

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6*,JUʹ͓͚Δ 7JFX-JGFDZDMF 4IPUB/BLBHBNJ!TIUOLHN

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6*࣮૷࣌ͷΑ͋͘Δ՝୊ w ͳΜ͔εΫϩʔϧ͕ΧΫΧΫ͢ΔɺҾ͔͔ͬΔ w "VUP-BZPVU͕ޮ͔ͳ͍ w 7JFXͷදࣔҐஔ͕͓͔͍͠ɺදࣔ͞Εͳ͍ w ը໘දࣔ·Ͱ͕஗͍

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Α͋͘Δσόοά w 6*ߋ৽ΛαϒεϨου͔ΒϝΠϯεϨουʹมߋ  ʢ௨৴ॲཧͷίʔϧόοΫ௨஌಺ͳͲʣ  㱺9DPEFͰ͸.BJO5ISFBE$IFDLFSͰ  νΣοΫՄ w Կ͔Α͘Θ͔Βͳ͍͚ͲɺMBZPVU*G/FFEFEͱ͔ॻ ͍ͨΒ௚Δ

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6*,JUͰͷ7JFXͷ  දࣔॲཧʹؔ͢Δ஌͕ࣝඞཁ

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7JFX-JGFDZDMFʹؔ͢Δϝιου VQEBUF$POTUSBJOUT*G/FFEFE TFU/FFET-BZPVU VQEBUF$POTUSBJOUT TFU/FFET6QEBUF$POTUSBJOUT MBZPVU4VCWJFXT ESBX TFU/FFET%JTQMBZ MBZPVU*G/FFEFE WJFX%JE-PBE MPBE7JFX WJFX8JMM"QQFBS VQEBUF7JFX$POTUSBJOUT WJFX8JMM-BZPVU4VCWJFXT WJFX%JE-BZPVU4VCWJFXT

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ଟ͍ʂʘ ?P? ʗ

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େ·͔ͳྲྀΕ w 7JFXͷಡΈࠐΈ w ੍໿ͷ௥Ճʢ"VUP-BZPVUʣ w ੍໿Λݩʹ7JFXͷGSBNFΛܭࢉʢϨΠΞ΢τʣ w GSBNFͷҐஔʹඳըʢϨϯμϦϯάʣ

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αϯϓϧϓϩδΣΫτ Λͭͬͯ͘ॲཧΛ௥ͬͯΈΔ IUUQTHJUIVCDPNTIUOLHN7JFX-JGFDZDMF4BNQMF

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̏ຕϏϡʔΛॏͶ͚ͨͩ ʢΧελϜ6*7JFXʣ ԼͷϏϡʔ͔Βॱʹ ɾ8IJUF7JFX  ʢTFMGWJFXʣ ɾ3FE7JFX  ʢ8IJUF7JFXͷTVCWJFXʣ ɾ#MVF7JFX  ʢ3FE7JFXͷTVCWJFXʣ

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Ϋϥε໊ͱϝιου໊Λ  ֤ϝιουݺͼग़࣌͠ʹϩάग़ྗ

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7JFXͷදࣔ·Ͱͷ ϩάग़ྗ݁Ռ

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ඳը ϨΠΞ΢τ ੍໿ߋ৽ ϏϡʔͷಡΈࠐΈ

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֤ϝιουͷઆ໌ 6*7JFX

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੍໿ͷߋ৽ʹؔ͢Δϝιου w VQEBUF$POTUSBJOUT   ੍໿ͷߋ৽Λ࣮ߦ  ։ൃऀ͕௚઀ݺͼग़͢ͷ͸/( w TFU/FFET6QEBUF$POTUSBJOUT   ੍໿ߋ৽ͷ࣮ߦཁ൱ͷϑϥάΛཱͯΔ  ܭࢉ࣮ߦλΠϛϯά͸γεςϜ೚ͤ w VQEBUF$POTUSBJOUT*G/FFEFE   ੍໿ߋ৽Λଈ࠲ʹ࣮ߦʢߋ৽ϑϥά͋Ε͹ʣ

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ύϑΥʔϚϯεͷྑ͍ॱ w PWFSSJEFͨ͠VQEBUF$POTUSBJOUT ಺Ͱ੍໿ߋ৽  ʢϨΠΞ΢τΤϯδϯͷόονॲཧʹؚ·Εɺϝ ΠϯεϨουΛϒϩοΫ͠ͳ͍ʣ w ੍໿ߋ৽ޙʹTFU/FFET6QEBUF$POTUSBJOUT   ʢΤϯδϯ͕·ͱΊͯߋ৽ॲཧΛ࣮ࢪʣ w ੍໿ߋ৽ޙʹVQEBUF$POTUSBJOUT*G/FFEFE   ʢଈ࣮࣌ߦͷͨΊɺόονॲཧʹؚ·Εͳ͍ʣ

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ϨΠΞ΢τʹؔ͢Δϝιου w MBZPVU4VCWJFXT   GSBNFͷߋ৽Λ࣮ߦ  ։ൃऀ͕௚઀ݺͼग़͢ͷ͸/( w TFU/FFET-BZPVU   GSBNFߋ৽ཁ൱ͷϑϥάΛཱͯΔ  ܭࢉ࣮ߦλΠϛϯά͸γεςϜ೚ͤ w MBZPVU*G/FFEFE   GSBNFߋ৽Λଈ࠲ʹ࣮ߦʢߋ৽ϑϥά͋Ε͹ʣ

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ύϑΥʔϚϯεͷྑ͍ॱ w PWFSSJEFͨ͠MBZPVU4VCWJFXT ಺ͰGSBNFߋ৽  ʢϨΠΞ΢τΤϯδϯͷόονॲཧʹؚ·Εɺ ϝΠϯεϨουΛϒϩοΫ͠ͳ͍ʣ w GSBNFߋ৽ޙʹTFU/FFET-BZPVU   ʢΤϯδϯ͕·ͱΊͯߋ৽ॲཧΛ࣮ࢪʣ w GSBNFߋ৽ޙʹMBZPVU*G/FFEFE   ʢଈ࣮࣌ߦͷͨΊɺόονॲཧʹؚ·Εͳ͍ʣ

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ඳըʹؔ͢Δϝιου w ESBX   ։ൃऀ͕௚઀ݺͼग़ͯ͠͸͍͚ͳ͍  $PSF(SBQIJDTΛ࢖ͬͯը໘ʹඳը͢Δ w TFU/FFET%JTQMBZ   ඳըߋ৽ͷ࣮ߦཁ൱ͷϑϥάΛཱͯΔ w ੍໿΍ϨΠΞ΢τߋ৽ͷΑ͏ʹɺ  ଈ࣮࣌ߦ༻ͷϝιου͸ͳ͠

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Ϗϡʔ֊૚ͱ࣮ߦॱং w ੍໿͸ࢠ7JFX͔Β w ϨΠΞ΢τ͸਌7JFX͔ Β

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͜͜·Ͱͷ·ͱΊʢ7JFXʣ w ੍໿  VQEBUF$POTUSBJOUT ύϑΥʔϚϯε͕ඞཁͳ৔߹౳ͳͲʹPWFSSJEF͢Δ  TFU/FFET6QEBUF$POTUSBJOUT ߋ৽ϑϥά  VQEBUF$POTUSBJOUT*G/FFEFE ଈ࣌ߋ৽ w ϨΠΞ΢τ  MBZPVU4VCWJFXT ύϑΥʔϚϯε͕ඞཁͳ৔߹ͳͲʹPWFSSJEF͢Δ  TFU/FFET-BZPVU ߋ৽ϑϥά  MBZPVU*G/FFEFE ଈ࣌ߋ৽ w ඳը  ESBX ύϑΥʔϚϯε͕ඞཁͳ৔߹ͳͲʹPWFSSJEF͢Δ  TFU/FFET%JTQMBZ ߋ৽ϑϥά

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֤ϝιουͷઆ໌ 6*7JFX$POUSPMMFS

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MPBE7JFX w ؅ཧ͢Δ7JFXΛಡΈࠐΉʢTFMGWJFXʣ w 4UPSZ#PBSEͰ࣮૷͢Δ৔߹͸PWFSSJEFෆཁ

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WJFX%JE-PBE w MPBE7JFX ͕׬ྃͨ͠ࡍʹݺ͹ΕΔ w 7$ͷදࣔαΠΫϧͰҰ౓͚ͩݺ͹ΕΔͨΊɺ  Ϋϥε಺Ͱར༻͢ΔΦϒδΣΫτͷॳظԽͳͲʹద͢Δ

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WJFX8JMM"QQFS w Ϗϡʔ͕දࣔ͞ΕΔ௚લʹݺ͹ΕΔ w ॳճදࣔҎ֎ʹ΋όοΫάϥ΢ϯυ෮ؼɺλϒ ੾Γସ͑ͳͲ

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VQEBUF7JFX$POTUSBJOUT w αϒϏϡʔͷ੍໿ߋ৽ޙɺTFMGWJFXͷ੍໿ߋ৽ ͕ඞཁͳࡍʹݺ͹ΕΔ w TFMGWJFXͷVQEBUF$POTUSBJOUT ͕ݺ͹ΕΔ w PWFSSJEFͰͷར༻༻్͸͋·Γͳ͠ʁ

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WJFX8JMM-BZPVU4VCWJFXT w ϏϡʔͷϨΠΞ΢τΛ։࢝͢Δ௚લʹݺ͹ΕΔ  ʢॳظදࣔ࣌΍ը໘ճస࣌ͳͲʣ w ϏϡʔͷMBZPVU4VCWJFX ͕࣮ߦ͞ΕΔ

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WJFX%JE-BZPVU4VCWJFXT w ϏϡʔͷϨΠΞ΢τ͕׬ྃͨ͠ࡍʹݺ͹ΕΔ  ʢෳ਺ճݺ͹ΕΔͷͰɺΦϒδΣΫτͷॳظԽͳͲ ʹ͸޲͔ͳ͍ʣ w TFMGWJFXGSBNF͸͜ͷϝιουΑΓ΋લͩͱ֬ఆ͠ ͍ͯͳ͍ w WJFX%JE-PBE ͳͲͰTFMGWJFXGSBNFΛ༻͍ͯϨΠ Ξ΢τ͢Δͱҙਤ͢ΔϨΠΞ΢τͱͳΒͳ͍Մೳੑ ͋Γ

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WJFX%JE"QQFS w Ϗϡʔ͕දࣔ͞Εͨ௚ޙʹݺ͹ΕΔ w WJFX8JMM"QQFS ಉ༷ɺόοΫάϥ΢ϯυ෮ؼ࣌ ΍λϒ੾Γସ͑࣌ͳͲෳ਺ճݺ͹ΕΔ w طʹ6*ද͕ࣔ׬͍ྃͯ͠ΔͷͰɺ6*දࣔʹؔ܎ ͷͳ͍ॲཧΛ࣮ߦ͢Δͷʹద͢Δʢϩάૹ৴ͳ Ͳʣ

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͜͜·Ͱͷ·ͱΊʢ7$ʣ w WJFX%JE-BZPVU4VCWJFXT ͷ࣮ߦ·Ͱ͸GSBNF ͕֬ఆ͍ͯ͠ͳ͍ͨΊɺ஫ҙ͕ඞཁ w WJFX͕දࣔ͞ΕΔɺWJFX%JE"QQFS ͷ࣮ߦ·Ͱ ͸6*ؔ࿈Ҏ֎Ͱͷίετͷ͔͔Δॲཧ͸ͳΔ΂ ͘͠ͳ͍ 

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"QQFOEJY

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2੍໿Λߋ৽ͨ͠ΒͲ͏ͳΔʁ w ੺͍Ϗϡʔͱ੨͍Ϗϡʔͷ੍໿Λߋ৽ w ؔ࿈͢Δ਌ϏϡʔͷTFU/FFET-BZPVU͕ݺ͹ΕΔ w ϑϥάཱ͕ͬͯɺMBZPVU4VCWJFXT͕ݺ͹ΕΔ  ʢϨΠΞ΢τΤϯδϯͷߋ৽λΠϛϯάʣ

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2εΫϩʔϧ͕ΧΫͭ͘ w TDSPMM7JFX%JE4DSPMM ͳͲͰϨΠΞ΢τߋ৽Λ ଈ࣮࣌ߦͯ͠ͳ͍͔νΣοΫ w ϏϡʔͷϨΠΞ΢τௐ੔͕ϝΠϯεϨουΛϒ ϩοΫͯ͠͠·͍ɺεΫϩʔϧͷͨΊͷϨΠΞ ΢τௐ੔͕ࢭ·͍ͬͯΔՄೳੑ͋Γ w MBZPVU4VCWJFXT ΛPWFSSJEF͢Δͱྑ͍͔΋

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2"VUP-BZPVUͰͷ  Ξχϝʔγϣϯ͕ಈ͔ͳ͍ w GSBNFͰͷΞχϝʔγϣϯͱҧ͍ɺ  ϒϩοΫ֎ʹߋ৽ॲཧΛॻ͘ ɾଈ࣌ߋ৽Λߦ͏ͨΊɺϒϩοΫ಺ͰlayoutIfNeeded()Λ ϨΠΞ΢τΛଈ࣮࣌ߦ ʢGSBNF͕ܾఆʣ 

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2ίʔυͰ੍໿Λ௥Ճͨ͠Βɺ  ίϯϑϦΫτͨ͠ "VUP3FTJ[JOH.BTL༝དྷͷ  ੍໿͕ࠞࡏ 

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w USBOTMBUFT"VUPSFTJ[JOH.BTL*OUP$POTUSBJOUT ΛແޮԽ w σϑΥϧτͰઃఆ͞ΕΔ"VUPSFTJ[JOHΛ  "VUP-BZPVUͷ੍໿ʹม׵͠ͳ͍ઃఆ

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠