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RxSwiftษڧձ ͦͷ0

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ࣗݾ঺հ • Yusuke Hosonuma • ݴޠ͸JavaɺObjective-CɺSwiftɺଞ৭ʑ • ʢ࠷ۙͷʣ࠲ӈͷ໏ɿ
 ͝஫จ͸10೥ؒอकՄೳͳίʔυͰ͔͢ʁ • QiitaͰ1,000௒͑ͨΑʂ

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RxSwift
 ʢ͋ʔΔ͍͑ͬ͘͢͢;ͱʣ

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͊͞RxSwiftॻͧ͘ʂ

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ʁ

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ʂʁ

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ͦΜͳ͜ͱʹ ͳΒͳ͍Α͏ʹ

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·ͣ͸

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ϦΞΫςΟϒ
 ϓϩάϥϛϯάͷ

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ߟ͑ํ͔Βֶ΅͏ʂ

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ࠓ೔ͷຊ୊

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ϦΞΫςΟϒϓϩάϥ ϛϯάͱ͸Կ͔ʁ

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ඇಉظσʔλετϦʔϜ Λ༻͍Δϓϩάϥϛϯά

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ඇಉظσʔλετϦʔϜͷྫ • I/OΠϕϯτ • ΫϦοΫΠϕϯτ • λονΠϕϯτ • etc…

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͑ɺͦΕͷ Ͳ͕͜৽͍͠ͷʁ

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ϦΞΫςΟϒϓϩάϥ ϛϯάͰ͸

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ຆͲ͢΂ͯΛ ετϦʔϜͰߟ͑Δ

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ԿͰ΋ετϦʔϜ • ม਺ • Ϣʔβೖྗ • ϓϩύςΟ • σʔλߏ଄ • etc…

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ͱ͜ΖͰ ετϦʔϜͬͯԿʁ

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ҰݴͰ͍͏ͳΒ

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Կ͔͕ྲྀΕͯ͘Δ ʮ઒ʯ

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౧͕ྲྀΕͯ͘ΔσʔλετϦʔϜʢ઒ʣ

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ετϦʔϜ͸ ͍ΖΜͳૢ࡞͕ग़དྷΔ

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ετϦʔϜͷૢ࡞ • ࡞੒
 ⾣ ৽ͨͳ઒Λ࡞ΕΔ • ߹੒ʢmergeʣ
 ⾣ ઒Λ߹ྲྀͯ͠Ұͭʹ͢Δ͜ͱ͕ग़དྷΔ • ม׵ʢfilterɺmapɺflatMapʣ
 ⾣ ͸ແࢹͨ͠Γɺ౧ଠ࿠ʹม͑ͨΓʢڧҾʁʣ

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ετϦʔϜͷ ՄೳੑΛߟ͑Δ

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ͦͷલʹ RxSwiftʹ͍ͭͯগ͠

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ུྺ • ReactiveX (Rx) ϑΝϛϦʔͷҰһ • Rxࣗମ͸.NETൃ঵ʢ࣮͸ރΕٕͨज़ʣ • ڝ߹͸ʮReactiveCocoaʯʮSwiftBondʯͱ͔

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ֶͿϞνϕʔγϣϯ • ঢ়ଶม਺ΛݮΒͤΔ • ෳࡶͳॲཧΛγϯϓϧʹهड़Ͱ͖Δ • ॲཧΛએݴతʹهड़Ͱ͖Δ
 ʢؔ਺ܕͷӨڹ͸ڧ͘ड͚ͯΔʣ • ͏ͪͷϓϩδΣΫτͰਖ਼ࣜ࠾༻ʢϐϯνͩΑʂʣ

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ؓ࿩ٳ୊

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ετϦʔϜ͸

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࣌ؒॱʹฒΜͩ
 ਐߦதͷΠϕϯτͷྻ

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ҎԼͷ3छྨ͕ྲྀΕͯ͘Δ • ʢԿΒ͔ͷܕʣ஋ • Τϥʔ • ׬ྃ • ஋ʹ͔͠ڵຯͳ͍ͱ͖͸ɺ
 Լ2ͭ͸ແࢹ͢Δ͜ͱ΋

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͜ͷʢ઒ʹʣ
 ྲྀΕͯ͘Δ΋ͷΛ

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؂ࢹʢlistenʣ͢Δ

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ϦΞΫςΟϒ༻ޠͩͱ subscribingʢߪಡʣ

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·͊ͭ·Γ͸

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઒Ͱચ୕͠ͳ͕Β ౧Λ଴ͬͯΔ͓͹͋ͪΌΜ

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μϒϧΫϦοΫͷ ετϦʔϜʹ͍ͭͯߟ͑Δ

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ී௨ʹ࣮૷͢Δͱʁ

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μϒϧΫϦοΫͷ࣮૷ • ΫϦοΫͨ͠λΠϛϯάΛ͓֮͑ͯ͘ม਺ • ִ࣌ؒؒΛௐ΂Δ • τϦϓϧΫϦοΫ͸ݕ஌͠ͳ͍Α͏ʹ • ؆୯ʹͰ͖ͦ͏͚ͩͲΘΓͱ໘౗ͦ͏

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ετϦʔϜͰߟ͑Δͱʁ

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250msͷִ͕ؒແ͍࣌ؒͰ ΠϕϯτΛ·ͱΊΔ

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Πϕϯτͷ·ͱ·ΓΛ ݸ਺ʹม׵͢Δ

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ݸ਺͕2ͷ΍͚ͭͩΛ ϑΟϧλʔ͢Δ

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ΫϦοΫͷ ετϦʔϜ͔Β

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μϒϧΫϦοΫͷ ετϦʔϜ͕ग़དྷͨʂʁ

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ετϦʔϜͷՄೳੑ͕ ݟ͖͑ͯ·ͤΜ͔ʁ

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๻͕޷͖ͳͷ͸ϦΞΫςΟϒϓϩάϥϛϯά͚ͩ͞ʂ ໋ྩܗϓϩάϥϛϯάͳΜͯΫιήʔͩʂ

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ͦΖͦΖऴΘΓͰ͕͢

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͜Ε͔ΒͷཱྀͷಓඪΛ

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ಓඪ • ʲ຋༁ʳ͋ͳ͕ͨٻΊ͍ͯͨϦΞΫςΟϒϓϩά ϥϛϯάೖ໳
 http://ninjinkun.hatenablog.com/entry/introrxja • RxSwift: ReactiveX for Swift
 https://github.com/tid-kijyun/RxSwift/blob/ translates-into-japanese/README-ja.md • ໎ͬͨ࣌͸͍ͭͰ΋ʮ઒ʯΛࢥ͍ग़͢͜ͱ

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ͪͳΈʹ಺෦తʹ͸

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Observerύλʔϯ͕ ࢖ΘΕ͍ͯ·͢

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΍΍͘͜͠ײ͡Δ༻ޠ͸ ͦͷ͋ͨΓ͔Βདྷ͍ͯ·͢

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Observer༻ޠ • Subject • Observable • Observer • Subscribe

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·ͱΊ

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ࠓ೔ͷ·ͱΊ • ϦΞΫςΟϒϓϩάϥϛϯά͸ʮඇಉظσʔλ ετϦʔϜʯΛ༻͍Δϓϩάϥϛϯά • ετϦʔϜ͸Կ͔ΒͰ΋࡞ΕΔɻ • ετϦʔϜ͸͍ΖΜͳૢ࡞ʢ߹੒ɾϑΟϧλɾม ׵ʣ͕Ͱ͖Δɻ • ͢΂ͯ͸ετϦʔϜͰ͋Δɻ

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Thanks.