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フィードやチャットのスクロールを全力でなめらかにする/iOSDC2019-LT
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dotrikun
September 06, 2019
Programming
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フィードやチャットのスクロールを全力でなめらかにする/iOSDC2019-LT
dotrikun
September 06, 2019
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Transcript
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. Copyright (C)
2018 DeNA Co.,Ltd. All Rights Reserved. ϑΟʔυνϟοτͷ εΫϩʔϧΛશྗͰͳΊΒ͔ʹ͢Δ iOSDC 2019 Lightning Talks September 7, 2019 Hiroshi Shikata Healthcare DeNA Co., Ltd. 1
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ηϧͷߴ͞ՄมͷTableViewCollectionViewΛ࡞Δͱ͖ 2
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. Α͋͘Δߴ͕͞มΘΔηϧͷྫ 3
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ςΩετͷจࣈʹΑͬͯߴ͕͞มΘΔ 4
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. UITableViewͰηϧͷߴ͞Λࣗಈʹઃఆ 5
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. දࣔͯ͠ 6
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ҰؾʹεΫϩʔϧ͍ͯ͘͠ͱ 7
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. Ҿ͔͔ͬΔͱ͖͕͋Δ 8
Ψο
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ͳʹ͕ى͍ͬͯ͜Δͷ͔ Cell
Cell Cell දࣔதͷηϧ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ͳʹ͕ى͍ͬͯ͜Δͷ͔ Cell
Cell Cell Cell දࣔதͷηϧ εΫϩʔϧ Cell Prefetchରʹͳͬͨηϧ ࣍ʹදࣔ͞ΕΔηϧ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ͳʹ͕ى͍ͬͯ͜Δͷ͔ Cell
Cell Cell Cell දࣔதͷηϧ 1.Cellͷੜ tableView(_:cellForRowAt:) Cell Prefetchରʹͳͬͨηϧ ࣍ʹදࣔ͞ΕΔηϧ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ͳʹ͕ى͍ͬͯ͜Δͷ͔ Cell
Cell Cell Cell දࣔதͷηϧ ࣍ʹදࣔ͞ΕΔηϧ 1.Cellͷੜ tableView(_:cellForRowAt:) 2.Cellͷඳը tableView(_:willDisplay:) 3. CellͷϨΠΞτ Cell Prefetchରʹͳͬͨηϧ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ͳʹ͕ى͍ͬͯ͜Δͷ͔ Cell
Cell Cell Cell දࣔதͷηϧ ࣍ʹදࣔ͞ΕΔηϧ 1.Cellͷੜ tableView(_:cellForRowAt:) 2.Cellͷඳը tableView(_:willDisplay:) 3. CellͷϨΠΞτ Cell Prefetchରʹͳͬͨηϧ ߴࣗ͞ಈܭࢉͷ߹ ͜ͷؒʹηϧͷߴ͕͞ܭࢉ͞ΕΔ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. FacebookͷதͷਓʹΑΔFacebookλΠϜϥΠϯͷٕज़ղઆ(2012) Ҿ༻:
https://www.facebook.com/notes/facebook-engineering/under-the-hood-mobile-timeline/10150500366118920/
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. FacebookͷதͷਓʹΑΔFacebookλΠϜϥΠϯͷٕज़ղઆ(2012) ▪
ϋʔυΣΞΞΫηϥϨʔγϣϯͷ࠷దԽ ▪ σβΠϯͷ ͳͲ ʢը૾දࣔʹؔ͢Δ෦͔Βൈਮʣ ௨৴ϦΫΤετͷϢʔβΤʔδΣϯτ͔ΒσόΠ εͷཧతͳԣ෯Λܾఆ͠ɺͦͷԣ෯Λ༻ͯ͠ ϖʔδ্ͷͯ͢ͷը૾ͷදࣔαΠζΛܾఆ͢Δ Ҿ༻: https://www.facebook.com/notes/facebook-engineering/under-the-hood-mobile-timeline/10150500366118920/
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. FacebookͷதͷਓʹΑΔFacebookλΠϜϥΠϯͷٕज़ղઆ(2012) ▪
ϋʔυΣΞΞΫηϥϨʔγϣϯͷ࠷దԽ ▪ σβΠϯͷ ͳͲ ʢը૾දࣔʹؔ͢Δ෦͔Βൈਮʣ ௨৴ϦΫΤετͷϢʔβΤʔδΣϯτ͔ΒσόΠ εͷཧతͳԣ෯Λܾఆ͠ɺͦͷԣ෯Λ༻ͯ͠ ϖʔδ্ͷͯ͢ͷը૾ͷදࣔαΠζΛܾఆ͢Δ →ίϯςϯπͷදࣔαΠζαʔόͰܭࢉࡁΈ Ҿ༻: https://www.facebook.com/notes/facebook-engineering/under-the-hood-mobile-timeline/10150500366118920/
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ࣄલʹίϯςϯπͷαΠζΛܭࢉ͓ͯ͘͠ 17
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ࣄલʹίϯςϯπͷදࣔαΠζΛܭࢉ͓ͯ͘͠ Cell
Cell Cell TableView σʔλऔಘ & දࣔαΠζܭࢉ දࣔσʔλ&CellSize εΫϩʔϧલʹߴܾͯ͢͞·͍ͬͯΔ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ෯ͱදࣔ͢ΔςΩετ͕ܾ·Εߴ͞ࢉग़Ͱ͖Δ 19
ςΩετͷจࣈʹΑͬͯߴ͕͞มԽ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ෯ͱςΩετ͕ܾ·Εߴ͞ࢉग़Ͱ͖Δ 20
▪ UILabel/UITextField / UITextViewͳͲUIViewΛܧঝͨ͠Class ▪ NSAttributedString
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. TableViewCellͱUILabelͷྫ 21
1.UILabelͷԣ෯ΛܾΊΔ TableViewͷԣ෯ - ࠨӈϚʔδϯ TableViewͷԣ෯
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. TableViewCellͱUILabelͷྫ 22
1. UILabelͷԣ෯ΛܾΊΔ TableViewͷԣ෯ - ࠨӈϚʔδϯ 2. UILabelͷαΠζΛࢉग़͢Δ 1ͷԣ෯Λࢦఆͯ͠ func sizeThatFits(_ size: CGSize) -> CGSize
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. ෯ͱදࣔ͢ΔςΩετ͕ܾ·Εߴ͞ࢉग़Ͱ͖Δ 23
1. UILabelͷԣ෯ΛܾΊΔ TableViewͷԣ෯ - ࠨӈϚʔδϯ 2. UILabelͷαΠζΛࢉग़͢Δ 1ͷԣ෯Λࢦఆͯ͠ func sizeThatFits(_ size: CGSize) -> CGSize 3. Cellͷߴ͞Λࢉग़͢Δ 2Ͱܭࢉͨ͠ߴ͞ + ্ԼϚʔδϯ
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. tableView(_:cellForRowAt:) →
ϨΠΞτߋ৽ྃ·Ͱͷੑೳൺֱ 24 ߴࣗ͞ಈܭࢉͷ߹ ߴ͞Λࣄલʹܭࢉ ฏۉ (ϨΠΞτߋ৽ྃ·Ͱ) ࠷େ (ϨΠΞτߋ৽ྃ·Ͱ)
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. tableView(_:cellForRowAt:) →
ϨΠΞτߋ৽ྃ·Ͱͷੑೳൺֱ 25 ߴࣗ͞ಈܭࢉͷ߹ ߴ͞Λࣄલʹܭࢉ ฏۉ (ϨΠΞτߋ৽ྃ·Ͱ) 14ms ࠷େ (ϨΠΞτߋ৽ྃ·Ͱ) 95ms
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. tableView(_:cellForRowAt:) →
ϨΠΞτߋ৽ྃ·Ͱͷੑೳൺֱ 26 ߴࣗ͞ಈܭࢉͷ߹ ߴ͞Λࣄલʹܭࢉ ฏۉ (ϨΠΞτߋ৽ྃ·Ͱ) 14ms 2ms ࠷େ (ϨΠΞτߋ৽ྃ·Ͱ) 95ms 3ms
Copyright (C) 2018 DeNA Co.,Ltd. All Rights Reserved. tableView(_:cellForRowAt:) →
ϨΠΞτߋ৽ྃ·Ͱͷੑೳൺֱ 27 ߴࣗ͞ಈܭࢉͷ߹ ߴ͞Λࣄલʹܭࢉ ฏۉ (ϨΠΞτߋ৽ྃ·Ͱ) 14ms 2ms ࠷େ (ϨΠΞτߋ৽ྃ·Ͱ) 95ms 3ms λΠϜϥΠϯνϟοτ͕ΞϓϦͷίΞػೳͳΒؤுΔՁ͋Δʂ