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SwiftUIのライブコーディングす るとxcodeが◯回落ちる
notoroid
July 27, 2019
Programming
0
13
SwiftUIのライブコーディングす るとxcodeが◯回落ちる
SwiftUIが発表されたWWDC2019初期から間もないプレゼンテーション資料。beta版のxcodeで実際に実演したところ表題通りxcodeが途中終了してしまった。
notoroid
July 27, 2019
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Transcript
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4XJGU6*ͷϥΠϒίʔσΟϯά͢ ΔͱYDPEF͕̋ճམͪΔ ͜ΕͬͯτϦϏΞʹͳΓ·ͤΜ͔
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ࣗݾհ
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ೳొཁ !OPUPSPJE w J04ΞϓϦ։ൃऀ w ߸͍Γ·͢ిࢉاը w !OPUPSPJE w !JSJNBTV
w Fεϙʔπ
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w 4XJGU6*ొ w 4XJGU6*ϥΠϒίʔσΟϯά w ·ͱΊ
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͢ൣғ w 4XJGU6*5VUPSJBMTΛͬͨϥΠϒίʔσΟϯά w $SFBUJOHBOE$PNCJOJOH7JFXT w IUUQTEFWFMPQFSBQQMFDPNUVUPSJBMTTXJGUVJDSFBUJOHBOE DPNCJOJOHWJFXT w %SBXJOH1BUITBOE4IBQFT
w IUUQTEFWFMPQFSBQQMFDPNUVUPSJBMTTXJGUVJESBXJOHQBUIT BOETIBQFT
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͞ͳ͍ൣғ w ը໘ભҠ w σʔλόΠϯσΟϯά w طଘ6*ͱͷΈ߹Θͤ w Ξχϝʔγϣϯ w
04͝ͱͷ4XJGU6*ͷద༻
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4XJGU6*ొ
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88%$ ։ൃऀʹΓࢁͷ༰
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4XJGU6*
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4XJGU6* w 4XJGUϕʔεͷ6*࡞ϑϨʔϜϫʔΫ w %4- ༻్ൣᙝݻ༗ݴޠ ͕4XJGUͰهड़Ͱ͖Δ w 4XJGUΛ%4-ʹدͤͨ w
6*Λߏ͢Δجຊఆٛ7JFX w 7JFXΛએݴత %FDMBSBUJWF ʹهड़Ͱ͖؆ܿͳهड़͕Մೳ
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4XJGU6* w 4XJGUϕʔεͷ6*࡞ϑϨʔϜϫʔΫ w %4- ༻్ൣᙝݻ༗ݴޠ ͕4XJGUͰهड़Ͱ͖Δ w 4XJGUʹ༷ΛՃͯ͠%4-ʹدͤͯ͠·͏ w
6*Λߏ͢Δجຊఆٛ7JFX w 7JFXΛએݴత %FDMBSBUJWF ʹهड़Ͱ͖؆ܿͳهड़͕Մೳ
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4XJGU6* w 4XJGUϕʔεͷ6*࡞ϑϨʔϜϫʔΫ w %4- ༻్ൣᙝݻ༗ݴޠ ͕4XJGUͰهड़Ͱ͖Δ w 4XJGUʹ༷ΛՃͯ͠%4-ʹدͤͯ͠·͏ w
6*Λߏ͢Δجຊఆٛ7JFX w 7JFXΛએݴత %FDMBSBUJWF ʹهड़Ͱ͖؆ܿͳهड़͕Մೳ Կ
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એݴత %FDMBSBUJWF w ͋Δग़ྗΛಘΔʹ͋ͨͬͯͦΕΛ࡞͢Δํ๏Ͱͳ͘ɺग़ྗͷੑ࣭Λه ड़͢Δ͜ͱΛʮએݴܕʯͱশ͢Δ w એݴతϓϩάϥϛϯάͷʮએݴతʯͬͯʁ w
IUUQTTIIBUFOBEJBSZPSHFOUSZ w )5.-એݴత
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"QQMFͱͯ͠
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એݴతͳهड़ΛՄೳͱ͠ એݴతͳهड़ʹ׳Ε͍ͯΔ ࡞Γख 8FC։ൃऀ Λݺͼد͍ͤͨ
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એݴతͳख๏Λఏڙ͢Δ͜ͱͰ ༷ʑͳ04 J04 NBD04 XBUDI04 Ͱ ಉ͡ख๏Λద༻Ͱ͖ΔΑ͏ʹ͍ͨ͠
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"QQMFͷ4XJGU6*ಋೖ w એݴతͳهड़ΛՄೳͱ͠એݴతͳهड़ʹ׳Ε͍ͯΔ࡞ΓखΛݺͼد͍ͤͨ w એݴతͳख๏Λఏڙ༷͠ʑͳ04Ͱಉ͡ख๏Λద༻Ͱ͖ΔΑ͏ʹ͍ͨ͠ w *OUFSGBDFCVJMEFSͰͷ6*࡞͔ΒҎ্ܦͪٻΊΒΕΔͷΛఏڙ͠ ͨ
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"QQMFͷ4XJGU6*ಋೖ w એݴతͳهड़ΛՄೳͱ͠એݴతͳهड़ʹ׳Ε͍ͯΔ࡞ΓखΛݺͼد͍ͤͨ w એݴతͳख๏Λఏڙ༷͠ʑͳ04Ͱಉ͡ख๏Λద༻Ͱ͖ΔΑ͏ʹ͍ͨ͠ w *OUFSGBDFCVJMEFSͰͷ6*࡞͔ΒҎ্ܦͪٻΊΒΕΔͷΛఏڙ͠ ͨ 8FC։ൃऀʹ·Ͱ։ൃऀͷؒޱΛ͛Δ
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ैདྷͷ6*෦ 4UPSZCPBSE YJC Έ߹ΘͤՄೳ
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04ʹ࠷దԽ͞ΕͨػೳΛ͜Ε·ͰͲ ͓ΓΞϓϦʹΈࠐΉ͜ͱͰ͖Δ
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એݴతهड़ʹෳࡶͳػೳΛఏڙͰ͖Δ ͍͏ͱࢥ͍ग़͢
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8FCϒϥβʔ 'MBTI લ
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4XJGU6*ͱطଘ6*ϑϨʔϜϫʔΫڞଘ͠ ͭͭ4XJGU6*ͰϦϓϨʔεͰ͖Δ6* ؆ܿʹهड़Ͱ͖ΔΑ͏ʹͳΔ J04͔Βʜ
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4XJGU6*ϥΠϒίʔσΟϯά
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4XJGU6*؆ܿʹ هड़Ͱ͖Δͷ͕ڧΈ
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ͱ͍͑ҙਤͨ͠ϨΠΞτ͕ ࡞Εͳ͚ΕʹͳΒͳ͍
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ࠓճطଘͷ6*Λਅࣅͯ͠ΈΔ
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ਅࣅ͢Δର λΠϦϯάϕʔεͷ6*
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ਅࣅ͢Δ6*
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(MPSJPVT#BUUFSZ w ·ͰͷόοςϦʔঢ়ଶΛͱഎܠ ৭Ͱݟ͘͢දࣔ w ΫϦʔϯͳΠϯλʔϑΣΠε w όοςϦʔঢ়ଶɺॆిঢ়ଶͷΈΛදࣔ w όοςϦʔ֬ೝ͍ͨ͠σόΠεΛট
w ·ͰొՄೳɻͭͷը໘Ͱ֬ೝͰ ͖·͢ɻ
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࣮ࡍͷϨΠΞτΛݟͯΈΔ
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None
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ηϧ 4BGF"SFB·Ͱ ృΓͭͿ͠
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None
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όοςϦʔྔ ୯Ґ ࣌ؒຖάϥϑ ॆిঢ়ଶ ໊ ԁάϥσʔγϣϯ
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(MPSJPVT#BUUFSZͷϨΠΞτ w ηϧ w ηϧຖʹόοςϦʔใ w ηϧͷഎ໘ʹάϥσʔγϣϯ w ηϧ4BGF"SFBΛग़͍ͯΔ
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YDPEFͷ ςϯϓϨʔτ͔ΒσβΠϯΛ ͚ۙͮͯΈΔ
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ϨΪϡϨʔγϣϯ w ϑΥϯταΠζ w ϑΥϯταΠζP⒎TFU w ϑΥϯτશମΦϑηοτ w άϥσʔγϣϯΧϥʔ
w $PMPS SFE HSFFO CMVF w άϥσʔγϣϯΧϥʔ w $PMPS SFE HSFFO CMVF w ԁάϥσʔγϣϯ։࢝ܘQYɺऴྃܘQY w ϓϩδΣΫτ໊.POJUPS w ΧελϜ7JFXɺ$POUFOU7JFXɺ.POJUPS7JFXɺ(SBQI7JFXΛ༻
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7JFX
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import SwiftUI struct ContentView: View { var body: some View
{ Text("Hello World") } } #if DEBUG struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } #endif 4XJGU6*ͷςϯϓϨʔτίʔυ 7JFXCPEZͰͭͷ7JFXΛੜ ͨ͠એݴΛ͢ඞཁ͕͋Δɻ
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ΈࠐΈ7JFXੜ 5FYU *NBHF -JOFBS(SBEJFOU 3BEJBM(SBEJFOU 3FDU"OHMF $JSDMF &MMJQTF (FPNFUSZ3FBEFS "OHVMBS(SBEJFOU
$BQTVMF
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ෳͷ7JFXΛஔ͢Δ߹ɺ 4UBDL )4UBDL 74UBDL ;4UBDL
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)4UBDL HStack { RectAngle() .foregroundColor(Color.red) RectAngle() .foregroundColor(Color.green) RectAngle() .foregroundColor(Color.blue) }
ᶃ ᶄ ᶅ هड़ॱʹࠨ͔Βӈʹஔ ᶃ ᶄ ᶅ
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74UBDL VStack { RectAngle() .foregroundColor(Color.red) RectAngle() .foregroundColor(Color.green) RectAngle() .foregroundColor(Color.blue) }
ᶃ ᶄ ᶅ هड़ॱʹ্͔ΒԼʹஔ ᶃ ᶄ ᶅ
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;4UBDL ZStack { RectAngle() .foregroundColor(Color.red) RectAngle() .foregroundColor(Color.green) RectAngle() .foregroundColor(Color.blue) }
ᶃ ᶄ ᶅ هड़ॱʹԞʹஔ ᶃ ᶄ ᶅ
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4UBDLͷஔ7JFXଆʹαΠζ ࢦఆ͕ͳ͍ݶΓഒஔ
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٧ΊࠐΉ߹ 4QBDFS Λࢦఆ
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7JFXFEHFT*HOPSJOH4BGF"SFB Λ ͏ͱ4BGF"SFBΛແࢹ͢ΔΑ͏ʹͳΔ
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4UBDL )4UBDL 74UBDL )4UBDL Λ Θͳͯ͘ஔͰ͖Δ
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7JFXʹஔ
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7JFXʹஔ
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CBDLHSPVOECPEZͷDMJQϑΟϧλʔʹ Өڹ͢Δɻ
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CBDLHSPVOE7JFXDMJQ ͷ ݁Ռ͕ө͞ΕΔ
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Rectangle() .fill( Color.clear ).background( എܠඳը͢ΔView ) .clipped()
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ϥΠϒίʔσΟϯάத
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Ϧιʔε w ϑΥϯταΠζ w ϑΥϯταΠζP⒎TFU w ϑΥϯτશମΦϑηοτ w άϥσʔγϣϯΧϥʔ
w άϥσʔγϣϯΧϥʔ
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RadialGradient(gradient: .init(colors: [Self.gradientStart, Self.gradientEnd]), center: .init(x: 0.5, y: 0.5), startRadius:
50, endRadius: 150) .aspectRatio(contentMode: .fill) static let gradientStart = Color(red: 102.0 / 255, green: 196.0 / 255, blue: 66.0 / 255) static let gradientEnd = Color(red: 87.0 / 255, green: 161.0 / 255, blue: 58.0 / 255) // .previewDevice(PreviewDevice(rawValue: "iPhone 8") ) .previewDevice(PreviewDevice(rawValue: "iPhone X") )
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import SwiftUI struct GraphView: View { var body: some View
{ HStack(spacing:0) { ForEach(0 ..< 12) { item in GraphLineView() } Spacer() } } } #if DEBUG struct GraphVioew_Previews: PreviewProvider { static var previews: some View { GraphView() // .previewDevice(PreviewDevice(rawValue: "iPhone 8") ) .previewDevice(PreviewDevice(rawValue: "iPhone X") ) } } #endif struct GraphLineView: View { var body: some View { ZStack { // Rectangle() // .foregroundColor(Color.green) ForEach(0 ..< 12 ) { item in GeometryReader { geometry in Path { path in let verticalOffset = 0.5 + (item == 0 ? 0 : (geometry.size.height * 0.2)) path.move( to: CGPoint( x: 0.5 + CGFloat(item) * 2.5, y: verticalOffset ) ) path.addLine( to: CGPoint( x: 0.5 + CGFloat(item) * 2.5, y: 0.5 + geometry.size.height ) ) } .stroke(Self.strokeColor, lineWidth: 1) } } }.frame(width:29.5, height:20) } static let strokeColor = Color(white: 1, opacity: 0.8) }
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·ͱΊ w 4XJGU6*4XJGUͰهड़Ͱ͖Δ%4-Ͱ͋Δ4XJGUιʔείʔυͰ͢ w ͿΓʹ"QQMF͕ॏ͍ࠊΛ্͛ͯ৽͍͠։ൃऀͷݺͼࠐΈத w 4XJGU6*ͷϨΠΞτ8FCͷσβΠϯʹ͍͚ۙͲΫη͋Γ w 4XJGU6*ྲྀ͠ࠐΉσʔλιʔε͋Γ͖ͳͷͰϞοΫΞοϓ༻ͷσʔλ ४උͨ͠΄͏͕͍͍͔
notoroid
notoroid
reverentgeek
rmw
skipperchong
carmenhchung
keathley
productmarketing
clairelew
thoeni
jcasabona
![RadialGradient(gradient: .init(colors: [Self.gradientStart, Self.gradientEnd]), center: .init(x: 0.5, y: 0.5), startRadius:](https://files.speakerdeck.com/presentations/4f2451cfe362403a84e36d7096ddaf05/slide_56.jpg){kind=link}
