UIColor Anatomy

iOSDC Japan 2020 #iosdc
「大解剖！UIColorファミリー」発表資料です。

https://fortee.jp/iosdc-japan-2020/proposal/8617aa4c-5386-4629-abf4-3e93ebfe2962

Transcript

1. @S_Shimotori
   େղ๤ʂUIColorϑΝϛϦʔ
   iOSDC Japan 2020
   

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2. ͠΋ͱΓ
   • @S_Shimotori_pub
   
   • iOSΉ͔͍ͣ͠
   2
   

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3. UIColor ϑΝϛϦʔ
   ？？？
   3
   

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4. UIColorͱαϒΫϥεͨͪ
   4
   

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5. UIColor͸େՈ଒ͩͬͨʂ
   UIColor
   5
   

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6. ࠓճ࿩͢ωλ
   • UIColorʹ͸αϒΫϥε͕͍ͬͺ͍ʂ
   
   • αϒΫϥε঺հ
   
   • UIColorͷαϒΫϥεࣗ࡞͸݁ߏ೉͍͠ɻ
   
   • UIColorͷϝιουͷڍಈΛݟΔ
   6
   

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7. UIColorʹ͸
   αϒΫϥε͕͍ͬͺ͍ʂ
   7
   

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8. ͔ΜͨΜver.
   private
   8
   

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9. αϒΫϥε͕͍ͬͺ͍͋Δཧ༝
   UIColor͸ͱͯ΋ෳࡶ͔ͩΒ
   9
   

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10. UIColor
    var red: CGFloat
    
    var green: CGFloat
    
    var blue: CGFloat
    ม׵?
    init(white:alpha:)
    
    init(cgColor:)
    ❌
    10
    

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11. ͲͷΑ͏ʹ৭σʔλΛอ࣋͢Δ͔ʁ
    • ͋ΒΏΔ৭σʔλΛಉ͡ܗࣜͰอ࣋͢Δͷ͸ແཧͦ͏
    
    • UIImageΛίϯϙʔωϯτ஋ʹม׵͸ແཧ
    
    • ৭ۭؒΛἧ͑Α͏ͱͯ͠ແҋʹม׵ͨ͠Βѻ͍ʹͦ͘͏
    
    • dynamic colorͷ৔߹͸traitʹԠͯࣗ͡༝ʹมΘΔ
    ৭Λܾఆ͢ΔͨΊͷσʔλΛͦͷ··͓͔࣋ͬͯ͘͠ͳ͍ʂ
    11
    

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12. ΋͠UIColor͕୯ମͰଘࡏ͍ͯͨ͠Β(1/2)
    class UIColor {
    private let redComponent: CGFloat?
    private let greenComponent: CGFloat?
    private let blueComponent: CGFloat?
    private let whiteComponent: CGFloat?
    private let alphaComponent: CGFloat?
    private let provider: ((UITraitCollection) -> UIColor)?
    private let image: UIImage?
    
    以下略
    12
    

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13. ΋͠UIColor͕୯ମͰଘࡏ͍ͯͨ͠Β(2/2)
    func withAlphaComponent() -> UIColor {
    
    if /*RGBで表現されているとき*/ {
    } else if /*色空間がdisplay P3のとき*/ {
    } else if /*パターンイメージを使うとき*/ {
    } else if /*dynamic colorのとき*/ {
    
    以下略
    13
    

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14. UIColorͷ࠾ͬͨղܾࡦ
    σβΠϯύλʔϯɿClass Cluster
    ʢAbstract Factoryͷ೿ੜʣ
    14
    

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15. σβΠϯύλʔϯͷ؍఺͔Β
    ←ந৅Ϋϥεɹ݉ɹΠϯελϯεͷੜ੒܎
    18ݸͷαϒΫϥεͦΕͧΕͰ

    18௨Γͷ۩ମతͳॲཧΛ࣮૷
    15
    

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16. Class Clusterͷ͕͍͜͜͢͝ʂ
    • ΫϥεΛ࢖͏ଆ͸಺෦࣮૷Λؾʹ͠ͳͯ͘Α͍
    
    • εʔύʔΫϥεUIColor͚ͩ஌͍ͬͯΕ͹े෼
    
    • αϒΫϥε͕ෳࡶͳ࣮૷Λ෼୲ͯ͘͠ΕΔ
    
    • ྫɿRGB୲౰ɺύλʔϯΠϝʔδ୲౰ɺAsset Catalog୲౰etc…
    16
    

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17. ࣮ࡍͷUIColor͸͜Μͳײ͡ʁ
    UIColor
    public init(red: CGFloat, ..., alpha: CGFloat) { return UIDeviceRGBColor() }
    
    public init(patternImage: CGFloat) { return UIDynamicPatternColor() }
    
    var cgColor: CGColor { get }
    UIDeviceRGBColor UIDynamicPatternColor
    let redComponent: CGFloat
    override var cgColor: CGColor {
    /*適切な処理*/
    }
    let image: UIImage
    override var cgColor: CGColor {
    /*適切な処理*/
    }
    RGB୲౰ ύλʔϯΠϝʔδ୲౰
    17
    ஫ɿਖ਼֬Ͱ͸͋Γ·ͤΜ
    

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18. ৭ͷܾఆํ๏͕͍ͬͺ͍ʂ
    • init(white:alpha:)
    
    • init(red:green:blue:alpha:) / init(hue:saturation:brightness:alpha:)
    
    • init(displayP3Red:green:blue:alpha:)
    
    • init(named:) / init(named:in:compatibleWith:)
    
    • init(dynamicProvider:)
    
    • init(ciColor:)
    
    • init(cgColor:)
    
    • init(patternImage:)
    
    • init(_:) ※SwiftUI.ColorɻiOS14.0ʙ
    શ෦ҧ͏αϒΫϥε͕ฦͬͯ͘Δ
    ʢ΋ͪΖΜݟ͔͚͸public class UIColorʣ
    18
    గਖ਼ʢ2020/09/20ʣ

    init(_:)͸طଘͷΫϥεΛฦ͢໛༷ɻ
    

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19. UIColorͷαϒΫϥε͸΋ͬͱ͍ͬͺ͍ʂ
    • ΠχγϟϥΠβ͕8छ10ݸʢiOS13.6࣌఺ʣ
    
    • init()΋ೖΕͨΒ9छ11ݸ
    
    • αϒΫϥε͕18ݸʢiOS13.6࣌఺ʣ
    iOS14Ͱ͸init(_:)͕૿͑ͯΔͷͰɺΠχγϟϥΠβ͕10छ12ݸɺαϒΫϥε͕19ݸʹͳ͍ͬͯΔ͔΋͠Εͳ͍ɻ
    19
    గਖ਼ʢ2020/09/20ʣ

    init(_:)͸طଘͷΫϥεΛฦ͢໛༷ɻ૿͑ͯͳ͍Έ͍ͨͰ͢ɻ
    

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20. αϒΫϥε঺հ
    20
    

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21. ͦͷલʹɿUIColorͷཪଆΛ࡯͢Δखஈ
    • class-dump
    
    • Objective CͷϔομΛ೷͚Δπʔϧ
    
    • Method swizzlingɺXcodeͷSymbolic Breakpoint
    
    • ಛఆͷϝιου͕ݺ͹ΕͨॠؒΛั·͑Δ
    
    • ԿΛ͍ͯ͠Δ͔΋ͪΐͬͱΘ͔Δ
    
    • object_getClass(_:)
    
    • ܕ໊ͷऔಘ
    
    • type(of:)ͩͱ͏·͘औΕͳ͍
    21
    

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22. class-dumpͰ೷͍ͯΈͨ
    UIKitCore.framework/UIDeviceRGBColor.hʢҰ෦ൈਮʣ
    #import
    
    __attribute__((visibility("hidden")))
    @interface UIDeviceRGBColor : UIColor
    {
    double redComponent;
    double greenComponent;
    double blueComponent;
    double alphaComponent;
    struct CGColor *_cachedColor;
    }
    
    - (_Bool)getWhite:(double *)arg1 alpha:(double *)arg2;
    Copyright (C) 1997-2019 Steve Nygard.
    22
    

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23. αϒΫϥεΛछྨ෼͚͢Δͱ͜Μͳײ͡
    

    dynamic color
    

    ίϯϙʔωϯτ஋Ͱ

    ৭Λܾఆ
    ଞFrameworkͱͷ࿈ܞ
    ϓϨʔεϗϧμʔ
    23
    

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24. 1. UIPlaceholderColor
    • init()ͰಘΒΕΔΫϥε
    
    • init()Ͱ͑͞UIColorΛฦ͞ͳ͍
    
    • Կ͔ಛఆͷ৭Λࢦ͍ͯ͠ΔΘ͚Ͱ͸ͳ͍
    24
    

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25. Nextɿίϯϙʔωϯτ஋Λѻ͏αϒΫϥε
    

    ίϯϙʔωϯτ஋Ͱ

    ৭Λܾఆ
    25
    

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26. 2-3. UI(Cached)DeviceRGBColor
    • RGBͰࢦఆ͞ΕΔ৭ͷͨΊͷΫϥε
    
    • RGBAίϯϙʔωϯτ஋Λड͚औΓɺอ͓࣋ͯ͘͠
    
    • init(red:green:blue:alpha:)Ͱ࡞ͬͨͱ͖͸UIDeviceRGBColor
    
    • init(hue:saturation:brightness:alpha:)΋͜Ε
    
    • UIColor.red΍UIColor.green͸UICachedDeviceRGBColor
    
    • Apple͕༻ҙͯ͘͠ΕͨRGBͷ৭ͷ͏ͪɺstatic colorͰ͋Δ΋ͷ
    26
    

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27. CachedͳΫϥεͱ͸
    • ͦͷ໊ͷ௨Γɺ࢖͍ճͨ͢ΊͷΫϥε
    
    • ࢀরΧ΢ϯτ΍copyͷ͋ͨΓΛௐ੔͍ͯ͠ΔΈ͍ͨ
    
    • ྫɿUIColor.blue΍UIColor.white
    
    • Ұ෦ͷαϒΫϥεͷΈ͕αϒΫϥεUICached???ColorΛ࣋ͭ
    27
    

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28. 4-5. UI(Cached)DeviceWhiteColor
    • άϨʔεέʔϧͳ৭͸ͬͪ͜
    
    • WhiteͱAlphaͷ஋Λड͚औΓɺอ͓࣋ͯ͘͠
    
    • init(white:alpha:)ͳΒUIDeviceWhiteColor
    
    • UIColor.white΍UIColor.clearͳΒUICachedDeviceWhiteColor
    28
    

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29. 6. UIDisplayP3Color
    • init(displayP3Red:green:blue:alpha:)ͰಘΒΕΔ
    
    • ৭ۭ͕ؒdisplay P3ͳ৭͸͜Ε
    29
    

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30. Nextɿdynamic color
    

    dynamic color
    30
    

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31. 7. UIDynamicColor
    • dynamic colorͷ௖఺
    
    • iOSʹ͓͍ͯdynamicͱ͸ʮtraitͷมԽʹԠͯ͡ಈతʹมΘΔʯͱ͍͏͜ͱ
    
    • var _isDynamic: Bool { get } ͕ਅ
    
    • ͜Ε͕ਅͳΒ͹traitͷมԽʹ௥ै͢ΔΒ͍͠
    31
    

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32. 8. UIDynamicSystemColor
    • Standard Colorͷ͏ͪɺdynamic colorͰ͋Δ΋ͷ
    
    • UIColor.systemBlue΍UIColor.systemBackgroundͳͲ
    32
    

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33. 9. UIDynamicCatalogColor
    • Asset Catalog init(named:) ͔ΒಘΒΕΔ
    
    • 1ͭͰ΋Dark ModeରԠͷ৭Λ࡞ͬͯ͋Δͱશͯͷ৭͕͜ͷΫϥεͰදݱ͞ΕΔ

    ʢstatic color͔͠ͳ͍৔߹͸static color༻ͷΫϥεΛ࢖͍෼͚Δʣ
    33
    

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34. 10. UIDynamicPatternColor
    • init(patternImage:)ͰಘΒΕΔΫϥε
    
    • ಺෦ʹUIImageΛ࣋ͭ
    
    • traitͷมԽʹԠͯ͡UIImage಺ͷը૾Λ࢖͍෼͚Δ
    34
    

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35. 11. UIDynamicProviderColor
    • init(dynamicProvider:)ͰಘΒΕΔ
    
    • ༩͑ͨproviderϒϩοΫΛอ͍࣋ͯ͠Δ
    35
    

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36. 12. UIDynamicAppDefinedColor
    • ରԠ͢ΔΠχγϟϥΠβ͸ͳ͠
    
    • ྫ͑͹UIDynamicProviderColorΛarchive & unarchive͢Δͱ͜ͷܕʹͳΔ
    
    • [UITraitCollection: UIColor] ͷ͔ͨͪͰه࿥͢Δ
    
    • ଞʹ΋ಇ͍͍ͯΔͱ͜Ζ͕͋ͬͨΒڭ͍͑ͯͩ͘͞
    36
    

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37. 13. UIDynamicModifiedColor
    • ରԠ͢ΔΠχγϟϥΠβ͸ͳ͠
    
    • ಺෦ʹUIDynamicColorΛ1ͭɺalpha componentΛ1ͭ࣋ͭ
    
    • ޙड़
    37
    

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38. NextɿଞͷFrameworkͱ࿈ܞ͢ΔαϒΫϥε
    ଞFrameworkͱͷ࿈ܞ
    38
    

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39. 14. UICIColor
    • init(ciColor:)ͰಘΒΕΔΫϥε
    
    • CIColorΛड͚औͬͯอ࣋͢Δ͔ΒUICIColor
    
    • CI = CoreImage.framework
    
    • ड͚औͬͨCIColorΛ಺෦ʹӅ͍࣋ͬͯ͠Δ
    
    • var ciColor: CIColor { get } ͸ͦͷ··ฦ͚ͩ͢ͷॲཧΛ͍ͯ͠ΔΈ͍ͨ
    39
    

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40. 15. UICGColor
    • init(cgColor:)ͰಘΒΕΔΫϥε
    
    • ಺෦ʹCGColorΛӅ͍࣋ͬͯ͠Δ
    
    • var cgColor: CGColor { get } ͸ͦͷ··ฦ͚ͩ͢
    
    • UICGColor͸αϒΫϥεΛ࣋ͭ
    40
    

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41. 16-17. UI(Cached)PatternCGColor
    • init(cgColor:)ͰಘΒΕΔΫϥεͦͷ2
    
    • PatternͳCGColorͷͨΊͷΫϥε
    
    • ڪΒ͘ var pattern: CGPattern? { get } Λ͍࣋ͬͯΔΑ͏ͳCGColor
    
    • खͬऔΓૣ͍ྫɿUIColor.init(cgColor: UIColor.init(patternImage: image).cgColor)
    
    • CachedΫϥεΛ࣋ͭʢUICachedPatternCGColorʣ
    41
    

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42. UIPatternCGColorΛ࡞Δ
    let drawPattern: CGPatternDrawPatternCallback = { info, context in
    let subunit = CGFloat(20.0)
    context.setFillColor(red: 0.5, green: 0, blue: 0, alpha: 1)
    context.fill(CGRect(x: 0, y: 0, width: subunit, height: subunit))
    context.setFillColor(red: 1, green: 0.3, blue: 0.3, alpha: 1)
    context.fill(CGRect(x: subunit, y: subunit, width: subunit, height: subunit))
    context.setFillColor(red: 0.7, green: 0.3, blue: 0, alpha: 1)
    context.fill(CGRect(x: 0, y: subunit, width: subunit, height: subunit))
    context.setFillColor(red: 0.7, green: 0.3, blue: 0, alpha: 1)
    context.fill(CGRect(x: subunit, y: 0, width: subunit, height: subunit))
    }
    var callbacks = CGPatternCallbacks(version: 0, drawPattern: drawPattern, releaseInfo: nil)
    let pattern = CGPattern(info: nil, bounds: CGRect(x: 0, y: 0, width: 1, height: 1), matrix:
    CGAffineTransform(a: 1, b: 0, c: 0, d: 1, tx: 0, ty: 0), xStep: 40, yStep: 40,
    tiling: .constantSpacing, isColored: true, callbacks: &callbacks)!
    
    let color = UIColor(cgColor: CGColor(patternSpace: CGColorSpace(patternBaseSpace: nil)!, pattern:
    pattern, components: [1, 1, 1, 1])!)
    ਺ࣈ͸ద౰Ͱ͢
    42
    

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43. UICachedPatternCGColorΛ୳͍ͯ͠·͢
    ಇ͍͍ͯΔͱ͜ΖΛݟ͔͚ͨํ͸@S_Shimotori_pub·Ͱʂ
    UICached

    PatternCGColor
    ※ಛʹँྱ͸ͳ͍Ͱ͢
    43
    

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44. 18. NSColor
    • UIKit.NSColor.init(coder:)ʹΑΓCocoa.NSColorΛunarchiveͰ͖Δ
    
    • UIColorΛσίʔυ͢Δͱ͖͸ݺ͹Εͳ͍Έ͍ͨ
    
    • ࣮ࡍʹฦͬͯ͘Δͷ͸UIDeviceRGBColor΍UIDeviceWhiteColor
    
    • ଞʹ΋Ӆ͠ػೳ͕͋ͬͨΒڭ͍͑ͯͩ͘͞
    
    • ͍ͯ͏͔ͳΜͰNSColor͕ཁΔΜͰ͠ΐ͏…ʁ
    44
    

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45. DataܕΛհͯ͠৭σʔλΛ෮ݩͰ͖ͪΌͬͨ
    Cocoa.NSColor→Data→UIColor
    let color = Cocoa.NSColor(calibratedWhite: 0.5, alpha: 0.5)
    
    let colorData = try! NSKeyedArchiver.archivedData(
    withRootObject: color, requiringSecureCoding: true
    )
    
    try! colorData.write(to: URL(fileURLWithPath: 略))
    let data = try! Data(contentsOf: URL(fileURLWithPath: 略))
    
    let color = try! NSKeyedUnarchiver.unarchivedObject(
    ofClasses: [UIColor.self], from: data
    ) // ここでUIKit.NSColor.init(coder:)が呼ばれる
    print(color) // Optional(UIExtendedGrayColorSpace 0.5 0.5)
    45
    

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46. UIColorͱαϒΫϥεͨͪʢ࠶ܝʣ
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47. UIColorͷαϒΫϥεࣗ࡞͸
    ݁ߏ೉͍͠ɻ
    47
    

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48. UIColorͷαϒΫϥεΛࣗ࡞͢Δͱ͸
    48
    

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49. • ·ͣ͸αϒΫϥεΛ࡞Δ
    
    • ϓϩύςΟ΍ϝιουΛܧঝͯ͠ઐ༻ͷॲཧΛ࣮૷͓ͯ͘͠
    ྫ͑͹͜Μͳײ͡ (1/2)
    @implementation MyColor: UIColor
    - (instancetype _Nonnull)initWithMyProperty:略 {
    略
    return self;
    }
    - (CGColorRef)CGColor { // 必要なプロパティやメソッドを継承
    return 略;
    }
    
    略
    
    @end
    49
    

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50. • UIColorʹ࡞੒༻ͷΠχγϟϥΠβΛ࣋ͨͤΔ
    
    • privateͳαϒΫϥεͷΠϯελϯεΛ࡞੒͢ΔखஈΛ༻ҙ͢Δ
    ྫ͑͹͜Μͳײ͡ (2/2)
    @implementation UIColor(MyColor) // UIColorにイニシャライザを持たせる
    - (UIColor * _Nonnull)initWithMyProperty:略 {
    return [[MyColor alloc] initWithMyProperty:略];
    }
    @end
    50
    

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51. ޙ෇͚ͰαϒΫϥεΛ࡞੒͢Δ৔߹ͷ೉қ౓
    • UIColor௚Լʹ࡞Δɿ؆୯ͳ΋ͷͳΒOK
    
    • ܧঝΛ๨Εͨϝιου΍ϓϩύςΟ͕͋Δͱ࠷ѱΫϥογϡ͢ΔͷͰ஫ҙ
    
    • SwiftͰͷ࣮૷͸ແཧʢHAKATA.swiftͰͷൃදΛݟͯͶʣ
    
    • privateͳαϒΫϥεͷԼʹ͚ͭΔɿແཧ
    
    • खग़͠Ͱ͖ͳ͍
    
    • dynamic color΍pattern colorΛ࡞Δɿ࣮࣭ແཧ
    
    • ϓϩύςΟ͕privateͳͷͰ͍͡ΔͱౖΒΕͦ͏
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52. dynamic colorΛ࡞Δ৔߹
    • ࢓ํ͕ͳ͍ͷͰUIColorΛ௚઀ܧঝ͢Δ
    
    • isDynamicΛਅʹͯ͠ɺtrait͕มԽͨ͠ͱ͖ʹ࠶ܭࢉͯ͠΋Β͏
    
    • ͪΌΜͱಈ͔͘͸஌Γ·ͤΜ
    - (BOOL)_isDynamic {
    return YES;
    }
    52
    

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53. ৄ͘͠͸
    • ୈ13ճHAKATA.swiftʮUIColor ClusterʯͷࢿྉΛݟͯͶ
    
    • σβΠϯύλʔϯ΍Swiftͷ࢓༷ʹॏ఺Λஔ͍ͯઆ໌͍ͯ͠·͢
    
    • @S_Shimotori_pub Ѽʹ࣭໰Λ౤͍͛ͯͩ͘͞
    53
    

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54. UIColorͷϝιουͷڍಈΛݟΔ
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55. αϒΫϥεʹࢧ͑ΒΕͨϝιου&ϓϩύςΟ
    • withAlphaComponent(_:)
    
    • resolvedColor(with:)
    
    • cgColor, ciColor
    
    • set(), setFill(), setStroke()
    
    • getHue(ུ) / getRed(ུ) / getWhite(ུ)
    
    • isEqual(to:)
    ⚠αϒΫϥε͝ͱʹಈ࡞͕ҟͳΔ͔΋⚠
    55
    

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56. withAlphaComponent(_:)
    • UIPlaceholderColor͸ಛఆͷ৭Λࢦ͍ͯ͠ͳ͍ͷͰΫϥογϡ
    
    • static colorͰ͸୯७ʹalpha componentΛ্ॻ͖͢Ε͹OK
    
    • ݩͱಉ͡Ϋϥε͕໭Γ஋ͱͯ͠ฦ͞ΕΔ
    
    • alpha componentҎ֎͸มߋ͞Εͳ͍
    
    • dynamic color͸ղܾͷͨͼʹalpha componentΛ্ॻ͖͢Δඞཁ͕͋Δ
    
    • ͭ·ΓUIDynamicModifiedColor͕ཁΔ
    
    • ͜ͷϝιουΛ࣮ߦͯ͠΋ݩͷUIDynamicColor͸ҡ࣋͞ΕΔ
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57. cgColorɺ resolvedColor(with:)
    ৭ͷղܾ
    • UIPlaceholderColor͸ಛఆͷ৭Λࢦ͍ͯ͠ͳ͍ͷͰΫϥογϡ
    
    • dynamic colorʹͱͬͯ͸ಛఆͷҰ৭ʹܾఆ͢Δૢ࡞
    
    • cgColor͸UITraitCollection.currentΛ࢖͍ͬͯΔΑ͏ʹݟ͑Δ
    
    • ྫ: layer.borderColor = dynamicColor.cgColor ͸࠷ॳ͚ͩਖ਼͍͠৭Ͱදࣔ͞ΕΔ
    
    • resolvedColor(with:)Ͱ͋Ε͹༩͑ͨUITraitCollectionͰ
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58. isEqual(to:)
    • UIPlaceholderColor͸ಛఆͷ৭Λࢦ͍ͯ͠ͳ͍ͷͰΫϥογϡ
    
    • ಉ͡αϒΫϥεͰɺϓϩύςΟ͕౳஋ͳΒਅʁ
    
    • ྫɿUIColor.whiteͱUIColor(white: 1, alpha: 1)͸ਅ
    
    • ྫɿUIColor(red: 1, green: 1, blue: 1, alpha: 1)ͱUIColor(white: 1, alpha: 1)͸ِ
    
    • UICIColorͱUICGColorͱͷ൑ఆ͸ِʹͳΔ
    
    • UIDynamicProviderColor͸ಉҰੑ൑ఆ͕ਅͰͳ͚Ε͹౳஋൑ఆ΋ਅʹͳΒͳ͍
    
    • UIDynamicAppDefinedColorʹ͢Ε͹౳஋൑ఆ͕ਅʹͳΕΔ
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59. ͪΐͬͱ໾ʹཱ͔ͭ΋͠Εͳ͍tips
    • XCTAssertEqualͰUIColorΛςετ͢Δͱ͖͸ɺಉ͡αϒΫϥεͰ൑ఆ͠Α͏
    
    • ҧ͏αϒΫϥεಉ࢜Ͱ͸equalʹͳΒͳ͍ͷͰςετ͕௨Βͳ͍
    ❌ UIDeviceRGBColorͷനͱUICachedDeviceWhiteColorͷന
    
    XCTAssertEqual(UIColor(red: 1, green: 1, blue: 1, alpha: 1), UIColor.white)
    
    ✅ UI(Cached)DeviceWhiteColorಉ࢜
    
    XCTAssertEqual(UIColor(white: 1, alpha: 1), UIColor.white)
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60. ·ͱΊ
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61. UIColorͱ͸
    • ৭ͷ༷ʑͳࢦఆํ๏Λαϙʔτ͢ΔͨΊɺࢥͬͨҎ্ʹෳࡶ
    
    • ෳࡶͳͭ͘ΓΛ͍ͯ͠Δ͚ͩͷཧ༝͕͋Δ
    
    • ࢲͨͪ͸UIColor͑͞஌͍ͬͯΕ͹OK
    • ࡉ͔͍͜ͱ͕ؾʹͳͬͨΒࢥ͍ग़͍ͯͩ͘͠͞
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62. ࢀߟจݙͳͲ
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63. ࢀߟจݙͱ͔໘നͦ͏ͳϖʔδͱ͔
    • Randomizing UIColor with Method Swizzling | Jonathan Cole
    
    • ʲIOS ARCʳ UIColor͕ϝϞϦʹ࢒͍ͬͯΔΑ͏ͳؾ͕͢Δ – ඥ෇͚ͳ೔ʑ
    
    • Patterns
    
    • Core Graphics Tutorial: Patterns | raywenderlich.com
    
    • iOS ൌགྷapp∍ന໛ࣜ - ࡥ඀
    
    • nygard/class-dump: Generate Objective-C headers from Mach-O files.
    
    • nst/RuntimeBrowser: Objective-C Runtime Browser, for Mac OS X and iOS
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64. ૉࡐ
    • ͔Θ͍͍ϑϦʔૉࡐू ͍Β͢ͱ΍
    
    • ;͖ͩ͠ૉࡐઐ໳αΠτʮϑΩμγσβΠϯʯ – Just another WordPress site
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