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マルチスレッドRxSwift @ 社内RxSwift勉強会

マルチスレッドRxSwift @ 社内RxSwift勉強会

マルチスレッドRxSwift @ 社内RxSwift勉強会

ukitaka

July 19, 2016
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  1. ϚϧνεϨουRxSwift
    @ࣾ಺RxSwiftษڧձ

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  2. ߹ΘͤͯಡΈ͍ͨ
    https://https://speakerdeck.com/ukitaka/rxswift-kodorideingufalsekan-suo-at-she-nei-rxswiftmian-qiang-hui/bricklife/rxswiftfalseobserveontosubscribeonwoli-jie-suru

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  3. ཁίʔυϦʔσΟϯά
    • ޙͰৄ͘͠આ໌͠·͕͢ɺʮͲͷεϨουͰ
    subscribe͕ߦΘΕ͔ͨʯ͕ͱͯ΋ॏཁʹͳ͖ͬͯ
    ·͢ɻ
    • ͜͜Ͱ͍͏subscribe͸಺෦తͳsubscribe΋ؚΈ
    ·͢ɻͭ·ΓʮOperator͕͍ͭͲͷεϨουͰ
    sourceΛsubscribe͢Δ͔ʯΛ೺Ѳ͠ͳ͍ͱɺڍಈ
    Λཧղ͢Δͷ͕೉͍͜͠ͱ΋͋Δ͔΋͠Ε·ͤΜɻ

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  4. ͜ͷεϥΠυͰ͸
    • ·ͣɺRxSwiftͱGCDͳͲͷ૊Έ߹ΘͤʹΑΔ
    ϚϧνεϨου؀ڥͰͷڍಈͷ֬ೝͱಈ࡞ϧʔ
    ϧͷઆ໌Λߦ͍·͢ɻ
    • ͦͷޙobserveOnɺsubscribeOnͷڍಈͷઆ
    ໌Λߦ͍·͢ɻ

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  5. ͜ͷεϥΠυͰ͸
    • ϚϧνεϨουͱ͍ͬͯ΋ɺଟ͘ͷiOS։ൃऀ͕ڵຯ͕͋Δͷ
    ͸ʮϝΠϯεϨουʯ͔ʮͦΕҎ֎͔ʯͩͱࢥ͍·͢ɻ
    • ͜ͷεϥΠυͰ͸ɺʮϝΠϯεϨουͰͳ͍εϨουʯΛ·ͱ
    ΊͯʮόοΫάϥ΢ϯυεϨουʯͱݺͿ͜ͱʹͯ͠ɺϝΠϯ
    εϨου͔όοΫάϥ΢ϯυεϨου͔ͷΈʹ஫໨͠·͢ɻ
    • ͭ·ΓόοΫάϥ΢ϯυεϨου͸ෳ਺͋Γɺ࣮ࡍʹͲͷεϨο
    υͰॲཧ͞ΕΔ͔͸ɺ(RxSwift͕಺෦తʹར༻͍ͯ͠Δ) GCD
    ΍NSOperationQueueʹґଘ͢Δ͜ͱʹ஫ҙ͍ͯͩ͘͠͞ɻ

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  6. ͜ͷεϥΠυͰ͸
    • RxSwift͸ v2.5.0 (2016೥7݄࣌఺Ͱͷmaster)
    Λݟͯ·͢ɻ
    • ͨͿΜόʔδϣϯ1ܥ΍ࠓޙͷόʔδϣϯͰ΋
    ௨༻͢Δ͔͸ෆ໌Ͱ͕͢ɺͨͿΜେ͖͘ζϨ
    Δ͜ͱ͸ແ͍ͱࢥ͍·͢ɻ

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  7. લฤ
    Observableͱ
    εϨου

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  8. ಈ࡞ϧʔϧ

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  9. ϧʔϧͦͷ1
    ௨ৗͷColdͳOperator͸
    subscribe͞ΕͨεϨουͰsubscribe
    on͞ΕͨεϨουͰonΛݺͿɻ

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  10. ϧʔϧͦͷ1(ଓ͖)
    ಛʹSchedulerͷࢦఆͳͲ͕ͳ͍৔߹ɺ
    createܥOperator͸subscribeͨ͠ε
    ϨουͰonΛݺͿɻ

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  11. ݴ༿͚ͩͩͱΑ͘Θ͔ΒΜ

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  13. Sequence Observer

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  14. Sequence Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου

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  15. Sequence Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    on

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  16. Question1
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  18. Map͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  19. Answer
    ਖ਼ղ͸…

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  20. A. όοΫάϥ΢ϯυεϨου

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  21. ղઆ
    Sequence Map Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου

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  22. ղઆ
    subscribe
    Sequence Map Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    ݺ͹ΕͨεϨουͰ಺෦తʹsourceͷ
    subscribeΛߦ͏ɻ

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  23. ղઆ
    subscribe
    Sequence Map Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribe͕ݺ͹ΕͨεϨουonΛݺͿ

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  24. ղઆ
    subscribe
    Sequence Map Observer
    subscribe
    on
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    on

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  25. Question2
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  27. Map͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  28. Answer
    ਖ਼ղ͸…

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  29. A. όοΫάϥ΢ϯυεϨου

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  30. ղઆ
    Sequence Map Observer
    Publish

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  31. ղઆ
    Sequence Map Observer
    Publish
    subscribe

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  32. ղઆ
    Sequence Map Observer
    subscribe
    Publish
    subscribe

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  33. ղઆ
    subscribe
    Sequence Map Observer
    subscribe
    Publish
    subscribe

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  34. ղઆ
    subscribe
    Sequence Map Observer
    subscribe
    Publish
    subscribe
    subscribe͕ݺ͹ΕͨεϨουonΛݺͿ

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  35. ղઆ
    subscribe
    Sequence Map Observer
    subscribe
    on on
    Publish
    subscribe
    on

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  36. (ิ଍) ղઆ
    subscribe
    Sequence Map Observer
    subscribe
    on on
    Publish
    subscribe
    on
    ಛʹઆ໌ͯ͠ͳ͔͕ͬͨɺSubject΋
    on͞ΕͨεϨουͰonΛݺͿ

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  37. Question3
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  39. Map͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  40. Answer
    ਖ਼ղ͸…

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  41. A. όοΫάϥ΢ϯυεϨου

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  42. ղઆ
    • refCount() ͸ʮHot͕ͩɺ࠷ॳʹsubscribe͞
    ΕΔ·Ͱಈ࡞͠ͳ͍ʯͱ͍͏ڍಈɻͭ·Γ࠷
    ॳʹsubscribe͕ݺ͹ΕͨεϨου͕ॏཁɻ
    • ࠓճ͸࠷ॳʹsubscribeΛݺΜͰ͍Δͷ͕όο
    Ϋάϥ΢ϯυεϨουͳͷͰόοΫάϥ΢ϯ
    υͰಈ࡞͢Δɻ

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  43. (࠶ܝ) ϧʔϧͦͷ1
    ௨ৗͷColdͳOperator͸
    subscribe͞ΕͨεϨουͰsubscribe
    on͞ΕͨεϨουͰonΛݺͿɻ

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  44. (࠶ܝ) ϧʔϧͦͷ1(ଓ͖)
    ಛʹSchedulerͷࢦఆͳͲ͕ͳ͍৔߹ɺ
    createܥOperator͸subscribeͨ͠ε
    ϨουͰonΛݺͿɻ

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  45. ࣍ͷϧʔϧ΁…

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  46. ϧʔϧͦͷ2
    createܥͷOperatorʹScheduler͕ࢦ
    ఆ͞Ε͍ͯΔ৔߹ɺsubscribe͢Δͱͦ
    ͷScheduler্ͰonΛݺͿɻ
    ͭ·ΓɺͲͷεϨουͰsubscribe͞Ε
    ͔ͨ͸ؔ܎ͳ͍ɻ
    (௕͍)

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  47. Scheduler
    • createܥͷOperatorʹ͸ɺSchedulerΛࢦఆͰ
    ͖Δ΋ͷ͕͋Δɻ

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  48. Scheduler
    • Scheduler͕ࢦఆ͞Ε͍ͯΔ৔߹ʹͲ͏͍͏ڍ
    ಈʹͳΔ͔ɺͱ͍͏ͷ͕ࠓճͷϧʔϧ

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  50. Scheduler͕ࢦఆ͞Ε͍ͯΔ

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  51. Sequence Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου

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  52. Sequence Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου

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  53. Sequence Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    on

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  54. ͭ·Γ
    • Scheduler͕ࢦఆ͞Ε͍ͯΔ৔߹͸Ͳ͜Ͱ
    subscribeΛݺ΅͏͕ɺࢦఆ͞Εͨ
    Scheduler(εϨου)ͰonΛݺͿɻ

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  55. Question4
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  57. ֤.Next, .Completed͸ͲͷεϨουͰon͞ΕΔͰ͠ΐ͏ʁ

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  58. Answer
    ਖ਼ղ͸…

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  59. A. ح਺͸όοΫάϥ΢ϯυεϨου
    ۮ਺͸ϝΠϯεϨου
    .Completed͸ෆఆ

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  60. ղઆ
    • .Nextʹ͍ͭͯ͸౴͑͸؆୯Ͱ͕͢ɺ୭͕Ͳ͏ಈ
    ͍͍ͯΔͷ͔ΠϝʔδͰ͖ΔͱΑΓྑ͍ͱࢥ͍
    ·͢ɻ
    • ͭ·ΓMergeSinkIter͕subscribeΛ͢Δ →
    Scheduler͕ࢦఆ͞Ε͍ͯΔͷͰͦͷεϨουͰ
    on͕ݺ͹Εͯobserverʹ౉͢ͱ͍͏͜ͱͰ͢ɻ

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  61. ղઆ
    • .Completed͸ෆఆͰ͢ɻෳ਺ͷqueueʹ
    dispatch͍ͯ͠ΔͷͰɺ࠷ޙʹྲྀΕ͖ͯ
    ͨ.Next͕ͲͷεϨου͔ͩͬͨͰ.Completed
    ͕ྲྀΕͯ͘ΔεϨου͕มΘΓ·͢ɻ
    • ·͊ී௨͸͜Μͳ࢖͍ํ͠ͳ͍ͱ͸ࢥ͍·͢
    ͕…

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  62. Question5
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  63. View Slide

  64. Replay͞ΕΔ.Next͸
    1. .NextΛ࠷ॳʹܭࢉͨ͠εϨου
    2. subscribeͨ͠εϨου
    ͲͪΒͰྲྀΕͯ͘ΔͰ͠ΐ͏ʁ

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  65. Answer
    ਖ਼ղ͸…

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  66. A. subscribeͨ͠εϨου

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  67. ղઆ
    • replay͸subscribe͞ΕͨεϨουͰߦΘΕ·
    ͢ɻ
    • ·͊ͦΕ͚ͩͰ͢ɻɻɻ

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  68. (࠶ܝ) ϧʔϧͦͷ2
    createܥͷOperatorʹScheduler͕ࢦ
    ఆ͞Ε͍ͯΔ৔߹ɺsubscribe͢Δͱͦ
    ͷScheduler্ͰonΛݺͿɻ
    ͭ·ΓɺͲͷεϨουͰsubscribe͞Ε
    ͔ͨ͸ؔ܎ͳ͍ɻ
    (௕͍)

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  69. ObservableͱεϨουʹؔ͢Δϧʔϧ
    1. ௨ৗͷColdͳOperator͸subscribe͞ΕͨεϨουͰ
    subscribeɺon͞ΕͨεϨουͰonΛݺͿɻಛʹ
    SchedulerͷࢦఆͳͲ͕ͳ͍৔߹ɺcreateܥOperator
    ͸subscribeͨ͠εϨουͰonΛݺͿ
    2. createܥͷOperatorʹScheduler͕ࢦఆ͞Ε͍ͯΔ৔
    ߹ɺsubscribe͢ΔͱͦͷScheduler্ͰonΛݺͿɻͭ
    ·ΓɺͲͷεϨουͰsubscribe͞Ε͔ͨ͸ؔ܎ͳ͍ɻ

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  70. ޙฤ
    observeOn, subscribeOn

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  71. observeOn, subscribeOn
    • ͔͜͜Β͸Scheduler(εϨου)Λมߋ͢Δͨ
    ΊͷOperator observeOn, subscribeOnʹͭ
    ͍ͯݟ͍͖ͯ·͕͢ɺ͜͜·Ͱͷ࿩͕ͳΜͱ
    ͳ͘ཧղͰ͖͍ͯΕ͹ಛʹ೉͘͠ͳ͍ͱࢥ͍
    ·͢ɻ

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  72. observeOn
    on͢ΔScheduler(εϨου)Λ
    มߋ͢Δ

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  73. subscribeOn
    subscribe͢ΔScheduler(εϨου)Λ
    มߋ͢Δ

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  74. ͦͷ··ʂʂ

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  75. ղઆ
    Sequence Map Observer
    subscribe
    on
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    observeOn
    .observeOn(backgroundScheduler)
    subscribe subscribe
    on
    on

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  76. ղઆ
    Sequence Map Observer
    subscribe
    on
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    observeOn
    .observeOn(backgroundScheduler)
    subscribe subscribe
    on
    on

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  77. ղઆ
    Sequence Map Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribeOn
    .subscribeOn(backgroundScheduler)
    subscribe
    on
    on
    on
    subscribe

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  78. ղઆ
    Sequence Map Observer
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribeOn
    .subscribeOn(backgroundScheduler)
    subscribe
    on
    on
    on
    subscribe

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  79. observeOn
    • observeOnʹ͍ͭͯ͸ɺͦΕΑΓલͷจ຺ʹ
    ؔ܎ͳ͘࢖͑ΔͷͰɺಛʹ೉͍͜͠ͱΛߟ͑
    ͣʹʮΠϕϯτ͕ྲྀΕͯ͘ΔεϨουΛม͑
    ͍ͨʂʯͱ͍͏ͱ͖ʹ࢖͑Δͱࢥ͍·͢ɻ

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  80. subscribeOn
    • subscribeOnʹ͍ͭͯ͸͔ͳΓ಺෦ͷಈ͖ʹ
    ґଘ͠·͕͢ɺཁ͸લฤͰΈͨ௨ΓͰɺͬ͟
    ͘Γݴͬͯ͠·͑͹ҎԼ͸ಉ͡Ͱ͢ɻ

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  81. subscribeOn
    • લͷจ຺ʹ͔ͳΓґଘ͢ΔͷͰɺͦ΋ͦ΋
    subscribeOn͕ޮ͔ͳ͍͜ͱ͢Β΋͋Γ·͢ɻ
    • ࢖͍υίϩͱͯ͠͸ɺcreateܥͷOperatorͷ
    ௚ޙʹॻ͍͓͍ͯͯͦͷScheduler(εϨου)
    Ͱ͔͠ಈ࡞͠ͳ͍ObservableΛ࡞Δ͜ͱ͕Ͱ
    ͖·͢ɻ

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  82. Question6
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  83. View Slide

  84. ͦΕͧΕͷMap͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  85. Answer
    ਖ਼ղ͸…

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  86. A. όοΫάϥ΢ϯυεϨου

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  87. ղઆ
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribe
    on
    on
    on
    subscribe
    Sequence Map Observer
    subscribeOn Map
    subscribe
    on

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  88. Question7
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  89. View Slide

  90. View Slide

  91. ͦΕͧΕͷMap͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  92. Answer
    ਖ਼ղ͸…

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  93. A. ϝΠϯεϨου

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  94. ղઆ
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribe
    subscribe
    Sequence Map Observer
    subscribeOn Map
    subscribe

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  95. ղઆ
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribe
    subscribe
    Sequence Map Observer
    subscribeOn Map
    subscribe
    Sequence͸MainSchedulerͰಈ࡞͢Δɻ

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  96. ղઆ
    subscribe
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribe
    subscribe
    Sequence Map Observer
    subscribeOn Map
    subscribe
    on on on on

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  97. Question8
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  98. View Slide

  99. ͦΕͧΕͷMap͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  100. Answer
    ਖ਼ղ͸…

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  101. A. όοΫάϥ΢ϯυεϨου

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  102. ղઆ
    • (ུ)

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  103. (࠶ܝ) observeOn
    on͢ΔScheduler(εϨου)Λ
    มߋ͢Δ

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  104. (࠶ܝ) subscribeOn
    subscribe͢ΔScheduler(εϨου)Λ
    มߋ͢Δ

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  105. ͓·͚
    Driver

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  106. Driver
    • Driver͸RxCocoa͕ఏڙ͍ͯ͠ΔɺUIͱͭͳ
    ͛Δͱ͖ʹྑ͍ײ͡ʹ΍ͬͯ͘ΕΔศརͳ
    Observableతͳ͛͢ʔ΍ͭɻ(ޠኮྗ)
    • ࡉ͔͍ੑ࣭͸͍Ζ͍Ζ͋ΔΜͰ͕͢ɺεϨο
    υपΓͷੑ࣭ʹ͍ͭͯݟͯΈ·͢ɻ

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  107. Driverͷ࡞Γํ
    • createܥͷOperatorΛར༻͢Δ
    • Observable͔Βม׵͢Δ

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  108. createܥͷOperatorΛར༻͢Δ
    • Driverʹ΋ಉ͡Α͏ʹcreate, just, ofͳͲͷ
    Operator͕ଘࡏ͢Δɻ
    • ίʔυΛಡΉͱ࢓૊Έ͸؆୯ͰɺϝΠϯεϨο
    υͰsubscribe͕͞ΕΔΑ͏ʹsubscribeOnΛ
    ݺΜͰ͍Δ͜ͱ͕Θ͔Δɻ

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  109. createܥͷOperatorΛར༻͢Δ

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  110. Observable͔Βม׵͢Δ
    • asDriverͰObservableΛDriverʹͰ͖Δ
    • ͬͪ͜΋؆୯ͰɺobserveOnͰϝΠϯεϨο
    υͰಈ࡞͢ΔΑ͏ʹ͍ͯ͠Δɻ

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  111. Observable͔Βม׵͢Δ

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  112. drive, driveNext
    • Driver ʹ͸ subscribe ͕ͳ͘ɺ୯७ʹ୅ΘΓ
    ʹdrive΍ driveNext ͳͲΛར༻͢Δɻ
    • 1͚ͭͩ஫ҙ఺͕͋ͬͯɺ͜ΕΒ͸ϝΠϯε
    ϨουͰ͔͠ݺ΂ͳ͍ɻ

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  113. drive, driveNext

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  114. DriverͷOperatorʹ͍ͭͯ
    • mapͳͲɺ௨ৗͷOperator͸͍͍ͩͨҰ௨Γ
    ༻ҙ͞Ε͍ͯΔɻ
    • ͜ΕΒΛݺΜͰ΋ಛʹεϨουʹӨڹ͸ͳ͍ɻ
    • driveOnSchedulerͱ͍͏Operator͕͋Δ͕ɺ
    ͜Ε͸ςετ༻ͳͷͰ࢖Θͳ͍Α͏ʹɻ

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  115. Question9
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  116. View Slide

  117. Map͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  118. Answer
    ਖ਼ղ͸…

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  119. A. Τϥʔ

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  120. ղઆ
    • drive͸ϝΠϯεϨου͔Β͔͠ݺ΂·ͤΜɻ
    (ͻ͔͚ͬʣ

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  121. Question10
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  122. View Slide

  123. Map͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  124. Answer
    ਖ਼ղ͸…

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  125. A. ϝΠϯεϨου

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  126. ղઆ
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribe
    Sequence Map Observer
    drive
    on on

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  127. Question11
    Ͳ͜ͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ

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  128. View Slide

  129. Map͸ͲͷεϨουͰಈ࡞͢ΔͰ͠ΐ͏ʁ
    Observerʹ͸ͲͷεϨουͰΠϕϯτ͕ಧ͘Ͱ͠ΐ͏ʁ

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  130. Answer
    ਖ਼ղ͸…

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  131. A. map͸όοΫάϥ΢ϯυ
    observer͸ϝΠϯ

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  132. ղઆ
    ϝΠϯεϨου
    όοΫάϥ΢ϯυεϨου
    subscribe
    Sequence Map Observer
    drive
    on
    on

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  133. ͓·͚ ͦͷ2
    NSURLSession+Rx

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  134. NSURLSession+Rx
    • rx_response΍rx_JSON͸όοΫάϥ΢ϯυε
    ϨουͰonΛݺΜͰ͘ΔͷͰɺωοτϫʔΫ
    → UI Λ΍Δͱ͖͸ؾΛ͚ͭΑ͏ɻ

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  135. ·ͱΊ

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  136. ObservableͱεϨουʹؔ͢Δϧʔϧ
    1. ௨ৗͷColdͳOperator͸subscribe͞ΕͨεϨουͰ
    subscribeɺon͞ΕͨεϨουͰonΛݺͿɻಛʹ
    SchedulerͷࢦఆͳͲ͕ͳ͍৔߹ɺcreateܥOperator
    ͸subscribeͨ͠εϨουͰonΛݺͿ
    2. createܥͷOperatorʹScheduler͕ࢦఆ͞Ε͍ͯΔ৔
    ߹ɺsubscribe͢ΔͱͦͷScheduler্ͰonΛݺͿɻͭ
    ·ΓɺͲͷεϨουͰsubscribe͞Ε͔ͨ͸ؔ܎ͳ͍ɻ

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  137. observeOn, subscribeOn
    1. subscribeOn͸subscribe͢ΔScheduler(ε
    Ϩου)Λมߋ͢Δɻ
    2. observeOn͸on͢ΔScheduler(εϨου)Λ
    มߋ͢Δɻ

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  138. Ҏ্ʂʂ

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