大で小を兼ねるな

by takasek

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େͰখΛ݉ͶΔͳ by takasek 2016/9/28 potatotips 33 1

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օ͞Μ͸ ೔෇Λ؅ཧ͢Δͱ͖ɺ ͲͷܕΛ࢖͍·͔͢ʁ 4

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NSDate? 5

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΋ͱ͍ Date? 6

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͋ͳͨͷΞϓϦͷ ೔෇࢓༷ 4 Ұ೔͸24࣌ؒ 7

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͋ͳͨͷΞϓϦͷ ೔෇࢓༷ 4 Ұ೔͸24࣌ؒ 4 ೔෇͕มΘΔͷ͸ɺே8࣌ 8

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͋ͳͨͷΞϓϦͷ ೔෇࢓༷ 4 Ұ೔͸24࣌ؒ 4 ೔෇͕มΘΔͷ͸ɺே8࣌ ɹ ※͜ͷ೔෇Λɺ ɹ௨ৗͷ೔෇ͱ۠ผ͢ΔͨΊʹɺ ɹShachikuDate ͱݺͼ·͢ 9

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ShachikuDateͷจࣈྻදݱΛಘΔ func shachikuDateDescription (_ !: Date) -> String { let formatter = DateFormatter() formatter.dateFormat = "yyyy೥MM݄dd೔" return formatter.string(from: !) } 10

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ShachikuDateΛ࢖͍͍ͨ let ! = parseDate("2016-09-28 07:59:58") //"8࣌લͳͷͰɺ shachikuDateDescription(!) //2016೥09݄27೔ #ͱද͍ࣔͨ͠ 11

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͜Μͳ;͏ʹม׵͢Δʁ extension Date { var shachikuDate: Date { if self.hour < 8 { //8࣌લͳΒ return (self.day - 1) //ࡢ೔ʹ͢Δ } else { return self } } } ※ͪΐͬͱٖࣅίʔυ 12

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໰୊ᶃ let !1 = parseDate("2016-09-27 08:00:00") let !2 = parseDate("2016-09-28 07:59:58") !1.shachikuDate < !2.shachikuDate ౰વtrueΛظ଴͠·͢ΑͶʁɹͰ΋… 13

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໰୊ᶃ let !1 = parseDate("2016-09-27 08:00:00") let !2 = parseDate("2016-09-28 07:59:58") !1.shachikuDate < !2.shachikuDate // false" 14

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໰୊ᶃ ͳͥͳΒ let !1 = parseDate("2016-09-27 08:00:00") let !2 = parseDate("2016-09-28 07:59:58") !1.shachikuDate // "2016-09-27 08:00:00" "มԽͯ͠ͳ͍ !2.shachikuDate // "2016-09-27 07:59:58" "Ұ೔ḪͬͯΔ 15

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໰୊ᶄ func printHoge(with !: Date) { printFuga(!.shachikuDate) } func printFuga(with !: Date) { print(!.shachikuDate) } let ! = parseDate("2016-09-28 07:59:58") printHoge(with: !) // "2016೥09݄26೔" ࡢ೔(9/27)ͷ೔෇Λظ଴͍ͯ͠Δͷʹɺ Ұࡢ೔(9/26)ʹͳ͍ͬͯΔ… 16

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໰୊ᶄ func printHoge(with !: Date) { printFuga(!.shachikuDate) } func printFuga(with !: Date) { print(!.shachikuDate) } ɹ Α͘ಡΉͱɺ 1. printHoge(with:) Ͱલ೔ͷDateʹม׵ 2. printHoge(with:) ͔Β printFuga(with:) ΛݺͿ 4 printFuga(with:) Ͱߋʹલ೔ͷDateʹม׵ 17

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!"#$%!"$% όάʹؾ෇͚Δ ؾ͕͠ͳ͍… %$"!%$#"! 18

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໰୊ᶅ Ϣʔβʔೖྗ஋ΛɺαʔόʹૹΔ func didReceiveUserInput (year: Int, month: Int, day: Int) { let ! = Date( calendar: Caldendar.default, year: year, month: month, day: day ) API.send(!) } 19

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!ʮͳ͋ʯ 20

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!ʮDBʹ 4004೥ͱ͔ ೖͬͯΔΜ͚ͩͲʯ 21

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!? 22

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func didReceiveUserInput (year: Int, month: Int, day: Int) { let ! = Date( calendar: Caldendar.default, year: year, month: month, day: day ) API.send(!) } ɹ ! Ͳ͜ʹ໰୊͕…!? 23

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func didReceiveUserInput (year: Int, month: Int, day: Int) { let ! = Date( calendar: Caldendar.default, //"࣮͸࿨ྐྵઃఆ#ͯͨ͠!!! year: year, //$2016 month: month, day: day ) API.send(!) } ࿨ྐྵઃఆͳͷͰ ! = ฏ੒2016೥ = 1988 + 2016 = ੢ྐྵ4004೥ ͱ͍͏Φν 24

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ॾѱͷࠜݯ Dateͱ͍͏ܕΛ ࢖͍ճ͍ͯ͠Δ 25

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Dateܕ͸ศར 26

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λΠϜκʔϯͷҧ͍΋ ྐྵ๏ͷҧ͍΋ શ෦ٵऩͯ͘͠ΕΔ 27

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Ͱ΋ ࣌ࠁͷࡉ੍͔͍ޚͬͯ ࠓɺඞཁʁ 28

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ࠓɺྐྵ๏ͬͯඞཁʁ 29

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ShachikuDate͕΄͍͠ͷ͸ ೔෇! ͚ͩ 30

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ͳΒɺ struct YMD { let year: Int let month: Int let day: Int var description: String { return "\(year)೥\(month)݄\(day)೔" } } let ! = YMD(year: 2016, month: 9, day: 28) 31

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γϯ ϓϧ 32

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όάͷೖΓࠐΈΑ͏͕ͳ͍ 33

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!✨ 34

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ಉ͜͡ͱ͸ ΤϯδχΞϦϯάͷ ༷ʑͳঢ়گͰ ݴ͑ͯɺ 35

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ྫ1 ☑ จষΛද͍ࣔͨ͠ ☑ Ұఆͷߴ͞Λ௒͑ͨΒεΫϩʔϧ͍ͤͨ͞ ! ͩͬͨΒUITextViewͰ͠ΐ͏ 36

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݁Ռ1 ! จষྖҬͷϚʔδϯͷ੍ޚͭΒ͍… จষྖҬͷheight͕͏·͘औΕͳ͍… …ਏ͍… 37

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!NSLayoutManager !NSTextStorage !NSTextContainer !etc... 38

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UITextViewͷ ಺෦ߏ଄͸ ҙ֎ͱຐڥ 39

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εΫϩʔϧͰ͖ΔLabel͕ ཉ͍͚ͩ͠ͳΒɺ UITextView͸ ΦʔόʔεϖοΫ 40

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݁ہ1 ! UILabel Λ UIScrollView ʹೖΕΔ࣮૷Ͱ ͘͢͝γϯϓϧʹղܾͰ͖ͨ… ʢίʔυ1ߦ΋ॻ͔ͣɺ ɹInterfaceBuilderͰ׬݁Ͱ͖ΔϨϕϧʣ 41

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ྫ2 ! ○○ػೳΛ࢖͍͍ͨͷͰ ͋ͷϥΠϒϥϦೖΕΑ͏ͬͱʂ 42

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݁Ռ2 ! ͋ͷϥΠϒϥϦͷ××ػೳʢผʹཁΒͳ͍ʣ ͕ ґଘ͢ΔผͷϥΠϒϥϦͷ͍ͤͰ Xcode8ରԠ͕ਐ·ͳ͍… ! Ͱ΋୤ϥΠϒϥϦ͸ ࠓߋແཧ… 43