Swift with apps by Hatena

Case of swift in Hatena

Transcript

1. ͸ͯͳͷ
   iOSΞϓϦͱSwift
   @Hatena Engineer Seminar #4
   

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2. id:yashigani_w
   @yashigani
   • http://yashigani.hatenablog.com
   • 2014/7ೖࣾ
   • ΞϓϦέʔγϣϯΤϯδχΞ
   • iOS/Android ࣌ʑ Perl
   

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4. ͸ͯͳͰͷࣄྫ
   

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5. ͸ͯͳϒοΫϚʔΫShare Extension
   • ΄΅શͯSwiftͰ࣮૷
   • Swiftͷ࣮ݧϓϩδΣΫτͱ͍
   ͏Ґஔ͚ͮ
   

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6. ͳͥShare ExtensionͰࢼ͔ͨ͠
   • App Extension͸ΞϓϦʹ΋͏Ұͭখ͍͞ΞϓϦΛ
   όϯυϧ͢Δܗଶ
   • ΞϓϦͷن໛ͱͯ͠খ͘͞ɼࣦഊͯ͠΋վमָ͕
   • SwiftΛࢼ͢ϓϩδΣΫτʹ࠷ద
   

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7. ݁Ռ
   • ࠓޙͷϓϩδΣΫτͰ͸ඪ४తʹSwiftΛ࠾༻͢Δ
   ͜ͱʹܾఆ
   • طʹࣾ಺޲͚ϥΠϒϥϦͷ͍͔ͭ͘͸SwiftʹҠߦ
   • Objective-Cॻ͖͍ͨͬͯਓ͸͍ͳ͘ͳͬͨ
   

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8. ͳͥɼ͋͑ͯखʹೃછΜͩ
   Objective-CΛغͯSwiftΛ࠾༻͢Δͷ͔
   

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9. - (Bookmark *)latestHotEntry:(NSArray *)bookmarks {
   NSPredicate *predicate =
   [NSPredicate predicateWithBlock:^(Bookmark *b,
   NSDictionary *bindings) {
   return b.isHotentry;
   }];
   NSArray *hotentries =
   [bookmarks filteredArrayUsingPredicate:predicate];
   NSSortDescriptor *descriptor =
   [NSSortDescriptor sortDescriptorWithKey:@"bookmarked"
   ascending:NO];
   NSArray *sortedHotentries =
   [hotentries sortedArrayUsingDescriptors:@[descriptor]];
   return sortedHotentries.firstObject;
   }
   

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10. func latestHotentry(bookmarks bs: [Bookmark]) -> Bookmark?
    {
    return bs.filter { $0.isHotentry }
    .sorted { (b1: Bookmark, b2: Bookmark) in
    b1.bookmarked.compare(b2.bookmarked)
    == .OrderedDescending
    }.first
    }
    

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11. Generics
    • ΑΓ҆શʹίʔυΛॻ͘͜ͱ͕Ͱ͖Δ
    • Objective-CͰ๷ޚతͳίʔυΛॻ͘ͱ৑௕
    • (࣍ཉ͔ͬͨ͠ͷ͸ܕΞϊςʔγϣϯ)
    • ΑΓॊೈͳίʔυ͕ॻ͚Δ
    

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12. - (Bookmark *)latestHotEntry:(NSArray *)bookmarks {
    for (id obj in bookmarks) {
    if (![obj isKindOfClass:Bookmark.class]) {
    return nil;
    }
    }
    NSPredicate *predicate =
    [NSPredicate predicateWithBlock:^(Bookmark *b,
    NSDictionary *bindings) {
    return b.isHotentry;
    }];
    NSArray *hotentries =
    [bookmarks filteredArrayUsingPredicate:predicate];
    NSSortDescriptor *descriptor =
    [NSSortDescriptor sortDescriptorWithKey:@"bookmarked"
    ascending:NO];
    NSArray *sortedHotentries =
    [hotentries sortedArrayUsingDescriptors:@[descriptor]];
    return sortedHotentries.firstObject;
    }
    

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13. Functional Programming
    • map, filter, sort etc.
    • ෳࡶͳ͜ͱΛ׬݁ʹදݱͰ͖Δ
    • ैདྷ͸ख࡞Γײ͕͋ͬͨ
    • NSPredicate, NSSortDescriptor
    

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14. Closures
    • Objective-CͷΤϯδχΞ͸ΈΜͳBlocks͍͖ͩ͢
    • (׳ΕΕ͹)ಡΊΔ
    • (׳Εͯ΋)ͦΒͰ͸ॻ͚ͳ͍
    • ແ͔ͬͨ࣌୅ʹ૝͍Λ஘ͤͳ͕Β͋Γ͕ͨ͘࢖͏
    

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15. int (^add)(int, int) = ^(int x, int y) {
    return x + y;
    };
    add(1, 2);
    @interface Hoge : NSObject
    @property (copy) int (^block)(int, int);
    @property (copy) NSString *title;
    - (void)fuga:(int(^)(int, int))block;
    @end
    Objective-C
    

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16. fuckingblocksyntax.com
    

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17. Swift
    let add = { (x: Int, y: Int) -> Int in
    return x + y
    }
    add(1, 2)
    class Hoge: NSObject {
    var closure: (Int, Int) -> Int
    var title: String
    func fuga(closure: (Int, Int) -> Int) {
    // ...
    }
    }
    

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18. ΄͔ʹ΋
    • Tuples
    • Optional
    • Playground(REPL)
    • namespace(classͷதʹclass/enum/struct͕ॻ͚Δ)
    

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19. Objective-C͔ΒSwift΁
    • ΑΓݫີͳ੩తܕ෇͚
    • ख࡞Γ͔Βݴޠαϙʔτ΁
    • Cͱͷޓ׵ΛغͯΔ͜ͱʹΑͬͯಘͨϞμϯͳػೳ
    

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20. ͍͚ͯͳ͍ͱ͜Ζ΋͋Δ
    • աڈͷࢿ࢈Λͦͷ··࢖͑ͳ͍͜ͱ͕͋Δ
    • CͰॻ͔Εͨ΋ͷͷҰ෦(ex: CommonCrypto)
    • C++Ͱॻ͔Εͨ΋ͷ
    • ࠷దԽͰҊ֎յΕΔ
    • ։ൃπʔϧ
    

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21. ࠷దԽͰյΕΔྫ(1)
    var query: [String: AnyObject] = makeKeychainQuery(account:
    account, type: type)
    var status: OSStatus = errSecSuccess
    var result: AnyObject?
    status = withUnsafeMutablePointer(&result, {
    SecItemCopyMatching(query,
    UnsafeMutablePointer($0))
    })
    query[kSecValueData] = passwordData
    

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22. ࠷దԽͰյΕΔྫ(2)
    var query: [String: AnyObject] = makeKeychainQuery(account:
    account, type: type)
    var status: OSStatus = errSecSuccess
    var result: AnyObject?
    status = withUnsafeMutablePointer(&result, {
    SecItemCopyMatching(query,
    UnsafeMutablePointer($0))
    })
    query[kSecValueData] = passwordData
    ࠷దԽ༗ޮ࣌ɼͳ͔ͥ։์͞Εͯ͠·͍
    ͦͷޙΞΫηε͢ΔͱΫϥογϡ͢Δ
    

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23. ࠷దԽͰյΕΔྫ(3)
    var query: [String: AnyObject] = makeKeychainQuery(account:
    account, type: type)
    var status: OSStatus = errSecSuccess
    var result: AnyObject?
    let temp = query
    status = withUnsafeMutablePointer(&result, {
    SecItemCopyMatching(temp, UnsafeMutablePointer($0))
    })
    query[kSecValueData] = passwordData
    յΕͯ΋͍͍Α͏ʹҰ࣌ม਺ʹୀආ͢ΔͱճආͰ͖Δ
    

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24. ࠷దԽ஫ҙϙΠϯτ
    • TestFlightͳͲͰϕʔλΛ഑෍ͨ͠ͱ͖ʹॳΊͯ

    ؾ͕ͭ͘͜ͱ͕ଟ͍
    • σϑΥϧτͰ͸σόοά࣌ʹ࠷దԽΛ͠ͳ͍
    • Ͳ͏ߟ͑ͯ΋͓͔͍͠ͱ͜ΖͰΫϥογϡͯͨ͠Β
    ेதീ۝࠷దԽͰյΕ͍ͯΔ
    • ߄ͯͳ͍Α͏ʹϦϦʔεʹ༨༟Λ࣋ͬͨQAܭը
    

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25. ϋϚͬͨͱ͖ͷΞυόΠε
    • σόοά࣮ߦͰ΋࠷దԽϨϕϧΛ্͛Ε͹࠶ݱՄೳ
    • Ұ࣌ม਺Λ࢖͏(ࠓճͷྫͷΑ͏ͳ৔߹)
    • Swift෼Λഉআ͢Δ(structΛ࢖Θͳ͍ɼNSObjectΛ
    ܧঝ͢Δ)
    • ࠶ݱ͸؆୯ͳͷͰɼఘΊͳ͍ڧ͍৺Λ࣋ͭ
    

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26. ։ൃπʔϧ͕μϝ
    • IDEͷػೳ͕΄΅࢖͑ͳ͍
    • ΍ͨΒΫϥογϡ͢ΔγϯλοΫεϋΠϥΠτ+
    ίʔυิ׬
    • ϦϑΝΫλϦϯάػೳ͸ະαϙʔτ
    • શ͘ಈ͔ͳ͍Θ͚Ͱ͸ͳ͍ͷͰզຫ͢Ε͹࢖͑Δ
    

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27. ΄͔ʹ΋
    • ܕਪ࿦͕͓΋ͬͨΑΓϔϘ͍
    • ϦϑϨΫγϣϯ͕·ͩແ͍
    • Objective-C͸ٯʹ͜Ε͕ΊͬͪΌڧ͔ͬͨ
    

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28. SwiftͰiOSΞϓϦΛ
    ࡞ΔΦεεϝߏ੒
    

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29. CocoaPods vs Carthage
    • CocoaPods͸0.36(preview൛)ΑΓSwiftʹରԠ
    • Carthage͸࠷ۙग़͖ͯͨ΍ͭ
    • iOS 8͔Β࢖͑Δɼdynamic frameworkΛϏϧυ͠
    projectʹຒΊΔ
    • աڈͷࢿ࢈͕࢖͑Δ͜ͱ΍ɼiOS 7ͷαϙʔτ΋ߟ͑Δ
    ͱ·ͩࠓ͸CocoaPodsΛ࢖͏ͷ͕ແ೉
    

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30. Alamofire vs AFNetworking
    • ඒ͍͠SwiftͷੈքͰด͍ͯ͡Δͷ͕Alamofire
    • ࡉ͔͍͜ͱ(ಛʹmultipartͰ௨৴)͕͍ͨ͠৔߹͸

    ໎ΘͣAFNetworking
    

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31. JSON
    • Optionalͱͱʹ͔͘૬ੑ͕ѱ͍
    • ૉ๿ʹ΍ΔͱΊͪΌͪ͘Όωετ͕ਂ͘ͳΔ
    • swift-json΍SwiftyJSONΛ࢖͏͜ͱ΋ݕ౼Ͱ͖Δ
    ͕ɼMantleΛ࢖͏ͷ͕Φεεϝ
    

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32. ૉ๿ʹ΍Δͱ͜͏ͳΔ
    let jsonObject : AnyObject! =
    NSJSONSerialization.JSONObjectWithData(dataFromTwitter,
    options: NSJSONReadingOptions.MutableContainers, error: nil)
    if let statusesArray = jsonObject as? NSArray {
    if let aStatus = statusesArray[0] as? NSDictionary {
    if let user = aStatus["user"] as? NSDictionary {
    if let userName = user["name"] as? NSString {
    //Finally We Got The Name
    }
    }
    }
    }
    

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33. MantleͳΒ͜͏
    let entries =
    MTLJSONAdapter.modelsOfClass(BookmarkEntry.self,
    fromJSONArray: JSONEntries,
    error: nil)
    return entries as [BookmarkEntry]
    

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34. ͸ͯͳͷ
    ϞόΠϧΞϓϦΤϯδχΞ
    

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35. εϚʔτձ
    • ٕज़ڞ༗/εΩϧΞοϓ + ϞόΠϧΞϓϦ։ൃ؀ڥ
    ੔උɼ޲্Λ໨తͱͨ͠νʔϜԣஅ૊৫
    • ٕज़ڞ༗͸ඇৗʹ׆ൃ
    • ։ൃ؀ڥʹ͍ͭͯ͸େ͖ͳݖݶ͕༩͑ΒΕ͍ͯΔͷ
    Ͱ΍Δؾ͍ͩ͠Ͱ΍Γ͍ͨΑ͏ʹͰ͖Δ
    

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36. ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

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