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大で小を兼ねるな
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takasek
September 28, 2016
Programming
4
1.8k
大で小を兼ねるな
potatotips #33 (iOS/Android開発Tips共有会)
http://potatotips.connpass.com/event/38557/
の発表資料です。
takasek
September 28, 2016
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Transcript
େͰখΛ݉ͶΔͳ by takasek 2016/9/28 potatotips 33 1
2
3
օ͞Μ Λཧ͢Δͱ͖ɺ ͲͷܕΛ͍·͔͢ʁ 4
NSDate? 5
ͱ͍ Date? 6
͋ͳͨͷΞϓϦͷ ༷ 4 Ұ24࣌ؒ 7
͋ͳͨͷΞϓϦͷ ༷ 4 Ұ24࣌ؒ 4 ͕มΘΔͷɺே8࣌ 8
͋ͳͨͷΞϓϦͷ ༷ 4 Ұ24࣌ؒ 4 ͕มΘΔͷɺே8࣌ ɹ ※͜ͷΛɺ ɹ௨ৗͷͱ۠ผ͢ΔͨΊʹɺ ɹShachikuDate
ͱݺͼ·͢ 9
ShachikuDateͷจࣈྻදݱΛಘΔ func shachikuDateDescription (_ !: Date) -> String { let
formatter = DateFormatter() formatter.dateFormat = "yyyyMM݄dd" return formatter.string(from: !) } 10
ShachikuDateΛ͍͍ͨ let ! = parseDate("2016-09-28 07:59:58") //"8࣌લͳͷͰɺ shachikuDateDescription(!) //201609݄27 #ͱද͍ࣔͨ͠
11
͜Μͳ;͏ʹม͢Δʁ extension Date { var shachikuDate: Date { if self.hour
< 8 { //8࣌લͳΒ return (self.day - 1) //ࡢʹ͢Δ } else { return self } } } ※ͪΐͬͱٖࣅίʔυ 12
ᶃ let !1 = parseDate("2016-09-27 08:00:00") let !2 = parseDate("2016-09-28
07:59:58") !1.shachikuDate < !2.shachikuDate વtrueΛظ͠·͢ΑͶʁɹͰ… 13
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
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" "ҰḪͬͯΔ 15
ᶄ func printHoge(with !: Date) { printFuga(!.shachikuDate) } func printFuga(with
!: Date) { print(!.shachikuDate) } let ! = parseDate("2016-09-28 07:59:58") printHoge(with: !) // "201609݄26" ࡢ(9/27)ͷΛظ͍ͯ͠Δͷʹɺ Ұࡢ(9/26)ʹͳ͍ͬͯΔ… 16
ᶄ func printHoge(with !: Date) { printFuga(!.shachikuDate) } func printFuga(with
!: Date) { print(!.shachikuDate) } ɹ Α͘ಡΉͱɺ 1. printHoge(with:) ͰલͷDateʹม 2. printHoge(with:) ͔Β printFuga(with:) ΛݺͿ 4 printFuga(with:) ͰߋʹલͷDateʹม 17
!"#$%!"$% όάʹؾ͚Δ ؾ͕͠ͳ͍… %$"!%$#"! 18
ᶅ ϢʔβʔೖྗΛɺαʔόʹૹΔ func didReceiveUserInput (year: Int, month: Int, day: Int)
{ let ! = Date( calendar: Caldendar.default, year: year, month: month, day: day ) API.send(!) } 19
!ʮͳ͋ʯ 20
!ʮDBʹ 4004ͱ͔ ೖͬͯΔΜ͚ͩͲʯ 21
!? 22
func didReceiveUserInput (year: Int, month: Int, day: Int) { let
! = Date( calendar: Caldendar.default, year: year, month: month, day: day ) API.send(!) } ɹ ! Ͳ͜ʹ͕…!? 23
func didReceiveUserInput (year: Int, month: Int, day: Int) { let
! = Date( calendar: Caldendar.default, //"࣮ྐྵઃఆ#ͯͨ͠!!! year: year, //$2016 month: month, day: day ) API.send(!) } ྐྵઃఆͳͷͰ ! = ฏ2016 = 1988 + 2016 = ྐྵ4004 ͱ͍͏Φν 24
ॾѱͷࠜݯ Dateͱ͍͏ܕΛ ͍ճ͍ͯ͠Δ 25
Dateܕศར 26
λΠϜκʔϯͷҧ͍ ྐྵ๏ͷҧ͍ શ෦ٵऩͯ͘͠ΕΔ 27
Ͱ ࣌ࠁͷࡉ੍͔͍ޚͬͯ ࠓɺඞཁʁ 28
ࠓɺྐྵ๏ͬͯඞཁʁ 29
ShachikuDate͕΄͍͠ͷ ! ͚ͩ 30
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
γϯ ϓϧ 32
όάͷೖΓࠐΈΑ͏͕ͳ͍ 33
!✨ 34
ಉ͜͡ͱ ΤϯδχΞϦϯάͷ ༷ʑͳঢ়گͰ ݴ͑ͯɺ 35
ྫ1 ☑ จষΛද͍ࣔͨ͠ ☑ Ұఆͷߴ͞Λ͑ͨΒεΫϩʔϧ͍ͤͨ͞ ! ͩͬͨΒUITextViewͰ͠ΐ͏ 36
݁Ռ1 ! จষྖҬͷϚʔδϯͷ੍ޚͭΒ͍… จষྖҬͷheight͕͏·͘औΕͳ͍… …ਏ͍… 37
!NSLayoutManager !NSTextStorage !NSTextContainer !etc... 38
UITextViewͷ ෦ߏ ҙ֎ͱຐڥ 39
εΫϩʔϧͰ͖ΔLabel͕ ཉ͍͚ͩ͠ͳΒɺ UITextView ΦʔόʔεϖοΫ 40
݁ہ1 ! UILabel Λ UIScrollView ʹೖΕΔ࣮Ͱ ͘͢͝γϯϓϧʹղܾͰ͖ͨ… ʢίʔυ1ߦॻ͔ͣɺ ɹInterfaceBuilderͰ݁Ͱ͖ΔϨϕϧʣ 41
ྫ2 ! ◦◦ػೳΛ͍͍ͨͷͰ ͋ͷϥΠϒϥϦೖΕΑ͏ͬͱʂ 42
݁Ռ2 ! ͋ͷϥΠϒϥϦͷ××ػೳʢผʹཁΒͳ͍ʣ ͕ ґଘ͢ΔผͷϥΠϒϥϦͷ͍ͤͰ Xcode8ରԠ͕ਐ·ͳ͍… ! ͰϥΠϒϥϦ ࠓߋແཧ… 43
͓Θ͔ΓͩΖ͏͔ ػೳ͕ଟ͍ ʹ ᠘͕ଟ͍ 44
େ͕খΛ݉ͶΔͱ ൵͠Έ͕ੜ·ΕΔ 45
ͱ͍͏Θ͚Ͱ 46
େࣄͳ͜ͱͳͷͰ ͏Ұݴ͍·͢ 47
େͰ খΛ ݉ͶΔͳ 48
ɹҎ্ɻ 49
see also: UNIXֶ - Wikipedia 50