DateComponentsと仲良くなる

iOSDC 2021で発表したスライドです。
* asken tech blog: https://tech.asken.inc
* youtube link: アップロードされたら

Transcript

1. TBUPTIJO!BTLFO*OD
   %BUF$PNQPOFOUTͱ
   ஥ྑ͘ͳΔɹ
   J04%$+BQBO
   

   View Slide

2. ຊηογϣϯʹ͍ͭͯ
   %BUF$PNQPOFOUTͱ஥ྑ͘ͳΔɹ
   

   View Slide

3. ຊηογϣϯʹ͍ͭͯ
   %BUF$PNQPOFOUTͱ஥ྑ͘ͳΔɹ
   ࠓɺ೤͍࿩୊ʁ
   

   View Slide

4. ຊηογϣϯʹ͍ͭͯ
   %BUF$PNQPOFOUTͱ஥ྑ͘ͳΔɹ
   ࠓɺ೤͍࿩୊ʁ
   %BUF$PNQPOFOUT͸J04
   

   View Slide

5. ຊηογϣϯʹ͍ͭͯ
   %BUF$PNQPOFOUTͱ஥ྑ͘ͳΔɹ
   J04ʹؔ͢Δʁ
   

   View Slide

6. ຊηογϣϯʹ͍ͭͯ
   %BUF$PNQPOFOUTͱ஥ྑ͘ͳΔɹ
   J04ʹؔ͢Δʁ
   

   View Slide

7. ຊηογϣϯʹ͍ͭͯ
   %BUF$PNQPOFOUTͱ஥ྑ͘ͳΔɹ
   ೔࣌ܭࢉΛ%BUFͰࡁ·ͤͪΌͬͯΔਓ
   %BUF$PNQPOFOUTΛ͋Μ·Γ࢖ͬͨ͜ͱ͕ͳ͍ਓ
   ͦΜͳਓͷͨΊͷηογϣϯͰ͢ɻ
   

   View Slide

8. ࣌ؒͷجૅ
   

   View Slide

9. ࣌ؒ͸ͲͷΑ͏ʹఆٛ͞ΕΔʁ
   

   View Slide

10. ࣌ؒ͸ͲͷΑ͏ʹఆٛ͞ΕΔʁ
    ࣌ؒ࣠
    

    View Slide

11. ࣌ؒ͸ͲͷΑ͏ʹఆٛ͞ΕΔʁ
    ࠓ
    ࣌ؒ࣠
    

    View Slide

12. ࣌ؒ͸ͲͷΑ͏ʹఆٛ͞ΕΔʁ
    ࠓ
    ج४఺
    ࣌ؒ࣠
    

    View Slide

13. ࣌ؒ͸ͲͷΑ͏ʹఆٛ͞ΕΔʁ
    ࠓ
    ج४఺
    ௕͞
    ࣌ؒ࣠
    

    View Slide

14. ࣌ؒ͸ͲͷΑ͏ʹఆٛ͞ΕΔʁ
    ࠓ
    ج४఺
    ௕͞
    ࣌ؒ࣠
    ༗໊ͳج४఺ɿ
    6/*9ΤϙοΫ 65$
    
    

    View Slide

15. ࣌ؒ͸ͲͷΑ͏ʹఆٛ͞ΕΔʁ
    ࠓ
    ج४఺
    ௕͞<ඵ>
    ࠃࡍ୯Ґܥʢ4*ʣͰఆٛ͞ΕΔ࣌ؒͷ୯Ґ͕ඵ
    ࣌ؒ࣠
    ༗໊ͳج४఺ɿ
    6/*9ΤϙοΫ 65$
    
    

    View Slide

16. 4XJGUͰ࣌ؒΛදݱ͢Δܕ͸ʁ
    %BUF
    

    View Slide

17. 4XJGUͰ͸ͲͷΑ͏ʹදݱ͞ΕΔʁ
    %BUF
    init(timeIntervalSinceNow: )
    init(timeIntervalSince1970: )
    init(timeIntervalSinceReferenceDate: )
    init(timeInterval: since: )
    init()
    

    View Slide

18. 4XJGUͰ͸ͲͷΑ͏ʹදݱ͞ΕΔʁ
    init(timeIntervalSinceNow: )
    init(timeIntervalSince1970: )
    init(timeIntervalSinceReferenceDate: )
    init(timeInterval: since: )
    init()
    %BUF
    

    View Slide

19. 4XJGUͰ͸ͲͷΑ͏ʹදݱ͞ΕΔʁ
    init(timeIntervalSinceNow: )
    init(timeIntervalSince1970: )
    init(timeIntervalSinceReferenceDate: )
    init(timeInterval: since: )
    init() = init(timeIntervalSinceNow: 0)
    %BUF
    

    View Slide

20. %BUF㱠೔෇
    %BUF࣌ؒͷ఺
    

    View Slide

21. ೥ʁ݄ʁ೔ʁ
    ඵ͔͠஌Βͳ͍Αʂ
    %BUF㱠೔෇
    %BUF࣌ؒͷ఺
    

    View Slide

22. ೔࣌ܭࢉͷ೉͠͞
    

    View Slide

23. ଍͠ࢉ͢Δ
    let after10Sec = Date() + 10
    let after1Minute = Date() + 60
    let after1Day = Date() + (60 * 60 * 24)
    let after1Month = Date() + (60 * 60 * 24 * 30)
    

    View Slide

24. ଍͠ࢉ͢Δ
    !
    let after10Sec = Date() + 10
    let after1Minute = Date() + 60
    let after1Day = Date() + (60 * 60 * 24)
    let after1Month = Date() + (60 * 60 * 24 * 30)
    

    View Slide

25. ೔࣌ܭࢉͰߟྀ͠ͳ͚Ε͹͍͚ͳ͍͜ͱ
    ͏Δ͏೥ͷଘࡏ
    ϲ݄ͷఆٛ
    αϚʔλΠϜ
    ͏Δ͏ඵͷଘࡏ
    ೥ ೔
    ϲ݄ ೔
    ೔ ࣌ؒ
    ෼ ඵ
    

    View Slide

26. ʌůɾ㱼ɾA
    ŷžŷž
    

    View Slide

27. ೔࣌ܭࢉΫϥε$BMFOEBS
    

    View Slide

28. ೔࣌ܭࢉΫϥε$BMFOEBS
    let calendar = Calendar(identifier: .gregorian)
    let after1Month =
    calendar.date(byAdding: .month, value: 1, to: Date())
    

    View Slide

29. ໰୊
    ʮੜ೥݄೔Λ%BUFͰදݱͰ͖Δ͔ʁʯ
    

    View Slide

30. ੜ೥݄೔Λ%BUFͰදݱͯ͠ΈΔ
    let birthday =
    Date(timeIntervalSince1970: 656_175_600)
    let formatter = DateFormatter()
    formatter.dateFormat = "yyyy-MM-dd"
    formatter.timeZone = TimeZone(abbreviation: "UTC")
    print(formatter.string(from: birthday))
    

    View Slide

31. ੜ೥݄೔Λ%BUFͰදݱͯ͠ΈΔ
    let birthday =
    Date(timeIntervalSince1970: 656_175_600)
    let formatter = DateFormatter()
    formatter.dateFormat = "yyyy-MM-dd"
    formatter.timeZone = TimeZone(abbreviation: "UTC")
    print(formatter.string(from: birthday))
    1990-10-18
    00:00:00 +09:00
    

    View Slide

32. ੜ೥݄೔Λ%BUFͰදݱͯ͠ΈΔ
    let birthday =
    Date(timeIntervalSince1970: 656_175_600)
    let formatter = DateFormatter()
    formatter.dateFormat = "yyyy-MM-dd"
    formatter.timeZone = TimeZone(abbreviation: "UTC")
    print(formatter.string(from: birthday))
    1990-10-18
    00:00:00 +09:00
    1990-10-17
    

    View Slide

33. %BUF࣌ؒͷ఺
    ஀ੜ೔ͳͲͷදݱʹ͸޲͔ͳ͍
    

    View Slide

34. %BUF࣌ؒͷ఺
    ੜ೥݄೔ͳͲͷදݱʹ͸޲͔ͳ͍
    

    View Slide

35. %BUF࣌ؒͷ఺
    ੜ೥݄೔ͳͲͷදݱʹ͸޲͔ͳ͍
    ࠓ೔ɺࠓ݄ɺࠓ೥ɺه೦೔ɺFUD
    λΠϜκʔϯʹґଘ͠ͳ͍೔࣌Λਖ਼֬ʹදݱͰ͖ͳ͍
    

    View Slide

36. ೔෇ͰදݱͰ͖Δܕ͕͋ͬͨΒͳ͊ɻɻɻ
    

    View Slide

37. %BUF$PNQPOFOUT
    

    View Slide

38. let calendar = Calendar(identifier: .gregorian)
    let birthday =
    DateComponents(calendar: calendar,
    year: 1990, month: 10, day: 18)
    

    View Slide

39. %BUF$PNQPOFOUTͷ
    *OJUJBMJ[FS͔Βಛ௃ΛݟΔ
    

    View Slide

40. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

41. ͭш㱬
    ŠƄŢŠƄŢ
    

    View Slide

42. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

43. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ͳΜͱҾ਺ݸʂ
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

44. %BUF$PNQPOFOUT
    ೔࣌Λߏ੒͢Δཁૉ܈
    

    View Slide

45. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    શͯ೔࣌ͷߏ੒ཁૉ
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

46. ͭͷཁૉຖ͸؆୯
    

    View Slide

47. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ΧϨϯμʔ
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

48. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    λΠϜκʔϯ
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

49. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ࣌୅ ݩ߸ HSFHPSJBOΧϨϯμʔͷ৔߹
    لݩલ
    ੢ྐྵ
    ࿨ྐྵΧϨϯμʔͷ৔߹
    େԽ
    ฏ੒
    ྩ࿨
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

50. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ೥݄೔࣌෼ඵφϊඵ
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

51. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ༵೔
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

52. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ͦͷ༵೔͕Կ൪໨͔
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    ݄ͷୈ ೔༵೔
    

    View Slide

53. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ࢛൒ظ
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

54. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ͦͷ݄ͷԿि໨͔
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    ݄ͷୈि໨
    

    View Slide

55. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ͦͷ೥ͷԿि໨͔
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

56. %BUF$PNQPOFOUT
    JOJUJBMJ[FS
    ೥ʢXFFLPGZFBS༻ʣ
    DateComponents(calendar: Calendar?, timeZone: TimeZone?,
    era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?,
    minute: Int?, second: Int?, nanosecond: Int?,
    weekday: Int?, weekdayOrdinal: Int?, quarter: Int?,
    weekOfMonth: Int?, weekOfYear: Int?, yearForWeekOfYear: Int?)
    

    View Slide

57. %BUF$PNQPOFOUT͸Ͳ͏࢖͏ʁ
    

    View Slide

58. ࡾͭͷ໾ׂ
    ೔࣌
    ྔ
    ύλʔϯϚον
    

    View Slide

59. ࡾͭͷ໾ׂ
    ೔࣌
    %BUF$PNQPOFOUT%BUF
    

    View Slide

60. ೔࣌
    DateComponents => Date
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021, month: 9, day: 19)
    var todayInJp = today
    todayInJp.timeZone = TimeZone(abbreviation: "JST")
    todayInJp.date // 2021-09-19 00:00:00 +09:00
    

    View Slide

61. ೔࣌
    DateComponents => Date
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021, month: 9, day: 19)
    var todayInJp = today
    todayInJp.timeZone = TimeZone(abbreviation: "JST")
    todayInJp.date // 2021-09-19 00:00:00 +09:00
    

    View Slide

62. ೔࣌
    Date => DateComponents
    let today = gregorianCalendar
    .dateComponents([.calendar, .year, .month, .day],
    from: Date())
    

    View Slide

63. ೔࣌
    let today = gregorianCalendar
    .dateComponents([.calendar, .year, .month, .day],
    from: Date())
    Date͔Β
    Calendarͱ೥݄೔͕ઃఆ͞Εͨ
    DateComponentsΛੜ੒
    Date => DateComponents
    

    View Slide

64. ʮࠓ೔ʯͷදݱྫ
    

    View Slide

65. ʮࠓ೔ʯͷදݱྫ
    

    View Slide

66. ೔࣌
    ʮࠓ೔ʯͷදݱྫ
    // 2021೥9݄19೔
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021, month: 9, day: 19)
    today.isValidDate // true
    

    View Slide

67. ೔࣌
    ʮࠓ೔ʯͷදݱྫ
    // 2021೥9݄ͷୈ3,೔༵೔
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021, month: 9,
    weekday: 1, weekdayOrdinal: 3)
    today.isValidDate // true
    

    View Slide

68. ೔࣌
    ʮࠓ೔ʯͷදݱྫ
    // 2021೥ͷ262೔໨
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021, day: 262)
    today.isValidDate // false
    

    View Slide

69. ೔࣌
    ʮࠓ೔ʯͷදݱྫʢ❌ʣ
    // 2021೥ͷ262೔໨
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021, day: 262)
    today.isValidDate // false
    2021೥1݄262೔ͱ൑ఆ͞Εɺfalse
    

    View Slide

70. ೔࣌
    ʮࠓ೔ʯͷදݱྫ
    // 2021೥ͷୈ38,೔༵೔
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021,
    weekday: 1, weekdayOrdinal: 38)
    today.isValidDate // false
    

    View Slide

71. ೔࣌
    ʮࠓ೔ʯͷදݱྫʢ❌ʣ
    // 2021೥ͷୈ38,೔༵೔
    let today =
    DateComponents(calendar: gregorianCalendar,
    year: 2021,
    weekday: 1, weekdayOrdinal: 38)
    today.isValidDate // false
    2021೥1݄ͷୈ38,೔༵೔ͱ
    ൑ఆ͞Εɺfalse
    

    View Slide

72. ࡾͭͷ໾ׂ
    ྔ
    ௕͞
    

    View Slide

73. ྔ
    ೔࣌ܭࢉͷ͓ڙʹ
    let oneMonth = DateComponents(month: 1) // ̍ϲ݄
    let oneMonthLater =
    calendar.date(byAdding: oneMonth, to: Date())
    

    View Slide

74. ྔ
    ೔࣌ܭࢉͷ͓ڙʹ
    let oneMonth = DateComponents(month: 1) // ̍ϲ݄
    let oneMonthLater =
    calendar.date(byAdding: oneMonth, to: Date())
    

    View Slide

75. ࡾͭͷ໾ׂ
    ύλʔϯϚον
    

    View Slide

76. ύλʔϯϚον
    UserNotificationͷTriggerදݱͳͲ
    let wakeUpAlertTime = DateComponents(hour: 8, minute: 30)
    let trigger = UNCalendarNotificationTrigger(
    dateMatching: wakeUpAlertTime, repeats: true)
    

    View Slide

77. ύλʔϯϚον
    UserNotificationͷTriggerදݱͳͲ
    let wakeUpAlertTime = DateComponents(hour: 8, minute: 30)
    let trigger = UNCalendarNotificationTrigger(
    dateMatching: wakeUpAlertTime, repeats: true)
    

    View Slide

78. ύλʔϯϚον
    UserNotificationͷTriggerදݱͳͲ
    let wakeUpAlertTime = DateComponents(hour: 8, minute: 30
    weekday: 1)
    let trigger = UNCalendarNotificationTrigger(
    dateMatching: wakeUpAlertTime, repeats: true)
    

    View Slide

79. ύλʔϯϚον
    UserNotificationͷTriggerදݱͳͲ
    let wakeUpAlertTime = DateComponents(hour: 8, minute: 30
    weekday: 1)
    let trigger = UNCalendarNotificationTrigger(
    dateMatching: wakeUpAlertTime, repeats: true)
    ೔༵೔ͷ8࣌30෼
    

    View Slide

80. 5JQT
    

    View Slide

81. 5JQT
    DateComponents(hour: 12)
    

    View Slide

82. 5JQT
    ྔΛද͢ͷ࣌ؒʁ
    ύλʔϯϚονͷ࣌ʁ
    DateComponents(hour: 12)
    

    View Slide

83. 5JQT
    %BUF$PNQPOFOUT͕ͲΜͳҙຯΛ͔࣋ͭ͸ɺίϯςΩετʹΑͬͯҟͳΔɻ
    ࠞཚ͢Δ৔߹ʹ͸ɺϥούʔΫϥεΛ࡞Δͷ͕͓͢͢Ίɻ
    // ྔతදݱʹݶఆ͢Δ
    struct DateLength {
    var value: DateComponents
    }
    

    View Slide

84. ·ͱΊ
    %BUF͸࣌ؒͷ఺Ͱ͋Γɺѻ͏୯Ґ͸ඵͷΈ
    ඵҎ֎୯ҐͰܭࢉΛߦ͏৔߹͸$BMFOEBSΛ࢖͏
    %BUF$PNQPOFOUT͸೔࣌Λߏ੒͢Δཁૉ܈Ͱ
    ओʹʮ೔࣌ɺྔɺύλʔϯϚονʯͷ໾ׂͰ࢖ΘΕΔ
    

    View Slide

85. ͚͋͢Μઈࢍ֦େதʂ
    J04%$ΰʔϧυεϙϯαʔɻ͚͋͢ΜϝΨω১͖࢖ͬͯͶʂ
    ࠃ಺ʮϔϧεέΞʯΧςΰϦͰ೥౓ͷ%-਺ɺऩӹ/Pʂ
    5FDIϒϩά࢝Ί·ͨ͠ʂ
    🥇
    📖
    🎩
    

    View Slide

86. ͚͋͢Μઈࢍ֦େதʂ
    5FDIϒϩάϦϯΫ
    ຊηογϣϯͷิ଍هࣄ΋ॻ͖·ͨ͠ɻ
    ͥͻνΣοΫͯ͠Έ͍ͯͩ͘͞ʂ
    https://tech.asken.inc
    

    View Slide

87. View Slide