Kotlin エンジニアへ送る：Swift 案件に参加させられる日に備えて～似てるけど色々違う Swift の仕様 / from Kotlin to Swift

Transcript

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2. } var employedBy = "YUMEMI Inc." var job = "iOS Developer" var organizerOf = "HAKATA.swift" var favoriteLanguage = "Swift" var twitter = "@lovee" var qiita = "lovee" var github = "el-hoshino" var additionalInfo = """ ࠓ೔͔Β iPhone ͰϚΠφϯόʔΧʔυ͕ ࢖͑ΔΑ͏ʹͳͬͨΑʂ iOS 26 Developer Beta 2 ΋ϦϦʔεͨ͠Αʂ """ final class Me: Developable, Talkable {
3. ͓͓ɺ,PUMJO׳Εͨํ͕4XJGUॻ͘ͱ͜Μͳͱ͜ΖͰ,PUMJOͷश׳͕ݱΕΔΜͩ Ͷʂ 13ϨϏϡʔʜ ڵຯ͋Δ͔Β΍Γ·͢! "OESPJEͱ,.1͸Ϧιʔε༨༟͋Δ͔Β୭͔J04ʹՃ੎͢Δਓ͍ͳ͍͔ʁ J04ͷ୲౰ऀগͳ͍͔Βਐ௙͕ͪΐͬͱ஗͍ͳʜ
4. %JTDMBJNFS w ঺հྫ͸͢΂ͯࣗ෼͕ίʔυϨϏϡʔͷࡍʹग़ձͬͨίʔυͰ͢ ʢΦϦδφϧͰ͸ͳ͘ษڧձʹ߹Θͤͨมߋ͋Γʣ
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   w ·ͨશͯͷҧ͍Λ໢ཏͰ͖ͯΔΘ͚Ͱ͸ͳ͍͜ͱΛѱ͔͠Βͣ
5. if (isUserValid) { // do something } 4XJGU
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6. if isUserValid { // do something }
7. enum LoginMethod { case userId case sns } 4XJGU
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   େจࣈখจࣈΛଗ͑·͢ IUUQTXXXTXJGUPSHEPDVNFOUBUJPOBQJEFTJHOHVJEFMJOFTHFOFSBMDPOWFOUJPOT
8. enum LoginMethod { case userID case sns } IUUQTXXXTXJGUPSHEPDVNFOUBUJPOBQJEFTJHOHVJEFMJOFTHFOFSBMDPOWFOUJPOT // શͯେจࣈͷུশͷ৔߹ var utf8Bytes: [UTF8.CodeUnit] var isRepresentableAsASCII = true var userSMTPServer: SecureSMTPServer // ಄จࣈ͚ͩେจࣈͷུশͷ৔߹ var radarDetector: RadarScanner var enjoysScubaDiving = true
9. enum LoginMethod { case userID case sns } func login(method: LoginMethod) { // do something } login(method: LoginMethod) 4XJGU
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10. enum LoginMethod { case userID case sns } func login(with method: LoginMethod) { // do something } login(with: LoginMethod)
11. enum LoginMethod { case userID case sns } func login(with method: LoginMethod) { // do something } login(with: LoginMethod.userID) 4XJGU
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12. enum LoginMethod { case userID case sns } func login(with method: LoginMethod) { // do something } login(with: .userID)
13. struct ConnectionOption: OptionSet { // ... static let customDnsIpTable: Self // ... } struct ConnectionOption: OptionSet { // ... static let customDNSipTable: Self // ... } struct ConnectionOption: OptionSet { // ... static let customDNSIPtable: Self // ... } struct ConnectionOption: OptionSet { // ... static let customDNSIPTable: Self // ... } ΫΠζ
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14. struct ConnectionOption: OptionSet { // ... static let customDnsIpTable: Self // ... } struct ConnectionOption: OptionSet { // ... static let customDNSipTable: Self // ... } struct ConnectionOption: OptionSet { // ... static let customDNSIPtable: Self // ... } struct ConnectionOption: OptionSet { // ... static let customDNSIPTable: Self // ... } ΫΠζ
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15. func handle(option: ConnectionOption) { if (option.contains(ConnectionOption.customDNSIPTable)) { // ... } } ಡΈ΍͍͢ϥϕϧΛ
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16. func handle(_ option: ConnectionOption) { if option.contains(.customDNSIPTable) { // ... } } ΫΠζ
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17. func handle(_ option: ConnectionOption) { if option.contains(.customDNSIPTable) { // ... } } let userOption: ConnectionOption = // ... handle(userOption) ΫΠζ
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18. ࢀߟࢿྉ w IUUQTXXXTXJGUPSHEPDVNFOUBUJPOBQJEFTJHOHVJEFMJOFT
19. struct UserData { internal func doSomething() { // ... } } 4XJGU
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20. struct UserData { func doSomething() { // ... } }
21. public struct UserData { func doSomething() { // ... } } QVCMJD
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22. public struct UserData { // ... } public extension UserData { internal func doSomething() { // ... } } །Ұͷྫ֎͸
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23. public struct UserData { // ... } extension UserData { func doSomething() { // ... } } ͜ΕͰ͍͍ΑͶʜʁ
24. struct UserData { let nickName: String let level: Int } struct
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25. ʮࢀরܕʯͱʮ஋ܕʯ w ʮࢀরܕʯͱ͸ɺ୅ೖ࣌ʹΠϯελϯε΁ͷࢀরΛίϐʔͯ͠୅ೖ ͢Δܕͷ͜ͱ
    w ʮ஋ܕʯͱ͸ɺ୅ೖ࣌ʹΠϯελϯεͷ஋ͦͷ΋ͷΛίϐʔͯ͠୅ ೖ͢Δܕͷ͜ͱ
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26. ࢀরܕͷ৔߹ " A = SomeThing() ࢀর
27. ࢀরܕͷ৔߹ " B = A # ࢀর
28. ࢀরܕͷ৔߹ " B.property = new # #ʹର͢Δมߋ͕"ʹ΋ ൓ө͞Εͯ͠·͏ ࢀর
29. ΠϛϡʔλϒϧΫϥε
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32. # ஋ܕͷ৔߹ " A = SomeThing()
33. # ஋ܕͷ৔߹ " B = A
34. ஋ܕͷ৔߹ " B.property = new # #ʹର͢Δมߋ͸
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35. struct UserData { var nickName: String var level: Int }
36. struct UserData { var nickName: String var level: Int } struct UserView: View { @State private var userData: UserData = //... var body: some View { VStack { TextField("Nick Name", text: $userData.nickName) } } } @State
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38. ஋ܕ͸ɺΠϛϡʔλϒϧΫϥεͱ΄΅ಉՁ
39. struct UserData { let id: UUID var nickName: String var level: Int } ݸਓతྫ֎ มߋ͍ͨ͠͸໌ࣔతʹΠϯελϯεΛ࠶ੜ੒ͯ͠΄͍͠ ϓϩύςΟʔʹ͚ͩ
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40. struct UserData { let id: UUID var nickName: String var level: Int } struct UserView: View { @State private var userData: UserData = // var body: some View { VStack { TextField("Nick Name", text: $userData.nickName) TextField("ID", text: $userData.id) } } } $BOOPU
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41. One more thing...
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46. એ఻ IUUQTIBLBUBTXJGUDPOOQBTTDPNFWFOU