Swift ã® Nil Coalescing Operator ã§ã‚³ãƒ³ãƒ‘イルã¯é…ããªã‚‹ã‹ - cockscomblog?
趣味ã®ã‚¦ã‚§ãƒ–ブラウジングをã—ã¦ã„ã‚‹ã¨ã€Swift ã®ã€€?? (nil coalescing operator) ãŒã‚³ãƒ³ãƒ‘イルをé…ãã™ã‚‹ã®ã§ã¯ãªã„ã‹ã€ã¨ã„ã£ãŸè©±é¡Œ*1を見ã‹ã‘ã¾ã—ãŸã€‚ã“ã®æ¼”ç®—åã¯ã€å·¦è¾ºã® Optional<Wrapped> åž‹ã®å€¤ãŒ Optional.none ã§ã‚ã‚‹å ´åˆã«å³è¾ºã®å€¤ã‚’è¿”ã™ã¨ã„ã†ã‚‚ã®ã§ã€ç›´æ„Ÿçš„ã«ã¯ã“ã‚ŒãŒã‚³ãƒ³ãƒ‘イル時間を悪化ã•ã›ã‚‹ã¨ã¯æ€ãˆã¾ã›ã‚“。経験ã‹ã‚‰è¨€ãˆã°ã€ã“ã®ã‚ˆã†ãªã‚±ãƒ¼ã‚¹ã§ã¯å¤§æŠµã‚„や複雑ãªåž‹æŽ¨è«–ãŒç™ºç”Ÿã—ã¦ãŠã‚Šã€ãã‚ŒãŒã‚³ãƒ³ãƒ‘イル時間ã«æ”¯é…çš„ãªå½±éŸ¿ã‚’与ãˆã¦ã„ã¾ã™ã€‚ãã†ã§ã‚ã‚‹ãªã‚‰ã€äººé–“ãŒå°‘ã—工夫ã—ã¦åž‹ã®ã‚³ãƒ³ãƒ†ã‚ストを与ãˆã¦ã‚„ã‚‹ã“ã¨ã§ã€è¨ˆç®—æ©Ÿã¯ãšã£ã¨ã‚ˆã„パフォーマンスを発æ®ã§ãã‚‹ã¯ãšã§ã™ã€‚ ã”ãç°¡å˜ãªä¾‹ã§å®Ÿé¨“ã—ã¦ã¿ã¾ã—ょã†ã€‚以下ã®ã‚³ãƒ¼ãƒ‰ã¯ã€let view: UIView? ãŒã‚ã‚‹ã¨ãã€åº§æ¨™ç³»ã«ãŠã‘ã‚‹ view ã®X座標を得よã†ã¨ã™ã‚‹ã‚‚ã®ã§ã™ã€‚ãŸã ã— view ãŒ
Swift init patterns - The.Swift.Dev.
The ultimate guide how to init your Swift data types, with the help of designated, convenience, failable intitializers and more. What is initialization?Initialization is the process of preparing an instance of a class, structure, or enumeration for use. This process is handled through initializers, an initializer is just a special kind of function, usually the init keyword is reserved for them - s
Swift 2.2 - cockscomblog?
寒ã•ã‚‚和らãŽã€æ—¥ã«ã‚ˆã£ã¦ã¯æ˜¥ã®è¨ªã‚Œã‚’æ„Ÿã˜ã•ã›ã‚‹ä»Šæ—¥ã“ã®é ƒã€ã„ã‹ãŒãŠéŽã”ã—ã§ã—ょã†ã‹ã€‚春ã¨ã„ãˆã° Swift ã§ã™ã€‚Swift ã¯æ˜¥ã¨ç§‹ã«ã€ã¾ã‚‹ã§è¡£æ›¿ãˆã®ã‚ˆã†ã«å¤§ããªãƒªãƒªãƒ¼ã‚¹ãŒã‚ã‚Šã¾ã™ã€‚2016å¹´ã®æ˜¥ã¨äºˆå‘Šã•ã‚Œã¦ã„㟠Swift 2.2 ã¯ã€ãŠãらãæ¥é€±ã«ã¯æ£å¼ã«ãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã‚‹ã‚‚ã®ã¨æ€ã‚ã‚Œã¾ã™3月22æ—¥ã«ãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¾ã—ãŸã€‚ Swift 2.2 ã¯ã€ãƒã‚°ã®ä¿®æ£ã‚„è¦å‘Šã‚„診æ–ã®æ”¹å–„ã€ã‚³ãƒ³ãƒ‘イル時間や実行速度ã®å‘上ãŒä¸»ç›®çš„ã§ã‚ã‚‹ã¨ã•ã‚Œã€ãã‚Œã«åŠ ãˆã¦ Swift 2.0 以æ¥ã®ã¡ã‚‡ã£ã¨ã—ãŸæ©Ÿèƒ½å‘上を図ã£ã¦ã®ãƒªãƒªãƒ¼ã‚¹ã¨ãªã‚Šã¾ã™ã€‚Swift2.2 㯠OSS ã¨ãªã£ãŸ Swift ã®åˆã‚ã¦ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚¢ãƒƒãƒ—ã§ã‚‚ã‚ã‚Šã¾ã™ã€‚ã™ãªã‚ã¡ã‚³ãƒŸãƒ¥ãƒ‹ãƒ†ã‚£ã‹ã‚‰ã®ç›´æŽ¥çš„ãªãƒ•ã‚£ãƒ¼ãƒ‰ãƒãƒƒã‚¯ã‚’経ãŸã€æœ€åˆã® Swift ã¨è¨€ãˆã‚‹ã§ã—ょã†ã€‚ãん㪠Swift 2.2 ã®å¤‰æ›´ã‹ã‚‰ä¸»ã ã£ãŸï¼ˆãŠã‚‚ã—ã‚ã„）部分を紹介ã—ã¾ã™ã€‚ 春ã«å‚™ãˆã¦æº–
iOS Cell Registration & Reusing with Swift Protocol Extensions and Generics
ios-cell-registration-swift.md iOS Cell Registration & Reusing with Swift Protocol Extensions and Generics A common task when developing iOS apps is to register custom cell subclasses for both UITableView and UICollectionView. Well, that is if you don’t use Storyboards, of course. Both UITableView and UICollectionView offer a similar API to register custom cell classes: public func registerClass(c
Swiftã§as!ã¨æ›¸ãå ´åˆã®ã‚¬ã‚¤ãƒ‰ãƒ©ã‚¤ãƒ³ - soutaroブãƒã‚°
as!ã£ã¦è¨€ã†ã®ã¯ã€è¦ã™ã‚‹ã«ãƒ€ã‚¦ãƒ³ã‚ャストã§ããªã„å ´åˆã«ãƒ—ãƒã‚°ãƒ©ãƒ を終了ã•ã›ã‚‹ã‚‚ã®ã§ã‚る。 if let x = expr as? SomeClass { f(x) } else { fatalError() } ã¨æ›¸ãã®ã§ã‚ã‚Œã°ã€ f(expr as! SomeClass) ã¨ã€åŒã˜ã“ã¨ãªã®ã§ã€as!ã§æ›¸ã„ãŸæ–¹ãŒè‰¯ã„。ãã®æ–¹ãŒã‚¿ã‚¤ãƒ—æ•°ãŒæ¸›ã‚‹ã—ã€ã‚³ãƒ¼ãƒ‰ã®è¦‹ãŸç›®ã‚‚ç°¡æ½”ã«ãªã£ã¦ç†è§£ã—ã‚„ã™ããªã‚‹ã€‚é•·ã„コードã¯ãã‚Œã ã‘ã§è‹¦ç—›ã ã—ã€ãªã«ã‹é–“é•ã£ãŸãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã‚’ã—ã¦ã„ã‚‹ã“ã¨ã‚’示ã™ã‚·ã‚°ãƒŠãƒ«ã«ã‚‚ãªã‚‹ã€‚ダウンã‚ャスト失敗ã®å ´åˆã«çµ‚了ã™ã‚‹ãŸã‚ã ã‘ã«ifを書ãã“ã¨ã¯ã€å…¨ä½“çš„ãªã‚³ãƒ¼ãƒ‰ã®ä¹±é›‘ã•ã‚’増ã—ã¦ã—ã¾ã„ã€æœ¬å½“ã®å•é¡Œã®è¦‹è½ã¨ã—ã«ç¹‹ãŒã‚‹ã€‚ ãŸã ã—ã€as?ã¨ã‹as!ã¨ã‹ãƒ€ã‚¦ãƒ³ã‚ャストをã—ã¦ã‚‹æ™‚点ã§ã€ãã®ãƒ—ãƒã‚°ãƒ©ãƒ ã«ã¯æ½œåœ¨çš„ãªå•é¡ŒãŒã‚ã‚‹ã¨è€ƒãˆã‚‹ã“ã¨ã‚‚ã§ãã¦ã€æœ¬å½“ã«ãƒ€ã‚¦ãƒ³ã‚ャストãŒå¿…è¦ãªã®ã‹3回ãらã„考ãˆãŸæ–¹ãŒè‰¯ã„。
Swift - encode URL
Swift 3 In Swift 3 there is addingPercentEncoding let originalString = "test/test" let escapedString = originalString.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed) print(escapedString!) Output: test%2Ftest Swift 1 In iOS 7 and above there is stringByAddingPercentEncodingWithAllowedCharacters var originalString = "test/test" var escapedString = originalString.stringByAddingPercentEn
Access Control and protected - Swift Blog
Swift is now open source. For the latest news, visit the Swift open source blog The response to support for access control in Swift has been extremely positive. However, some developers have been asking, “Why doesn’t Swift have something like protected?†Many other programming languages have an access control option that restricts certain methods from being accessed from anywhere except subclasses
ç‹è‚‰Swiftプãƒã‚°ãƒ©ãƒžãƒ¼ã«ãªã‚‹ãŸã‚ã®ARCトレーニング - Qiita
ã¯ã˜ã‚ã« ã“ã‚“ã«ã¡ã¯ã€‚haranicleã§ã™ã€‚ 2015年。エンジニアã«ã‚‚ç‹è‚‰ãŒæ±‚ã‚られる時代ã«ãªã‚Šã¾ã—ãŸã€‚ 今回ã¯ã€ç‹è‚‰Swiftプãƒã‚°ãƒ©ãƒžãƒ¼ã«ãªã‚ŠãŸã„皆様ã¨ã„ã£ã—ょã«ã€ Swiftã®åŸºç¤Žã§ã‚ã‚‹ARCã«ã¤ã„ã¦ãƒˆãƒ¬ãƒ¼ãƒ‹ãƒ³ã‚°ã—ã¦ã„ãã¾ã—ょã†ã€‚ ãŒã‚“ã°ã‚Šã¾ã—ょã†ã€‚💪💪💪 å‰æ Swift2.1ã«ã¤ã„ã¦ã®è¨˜è¼‰ã—ã¦ã„ã¾ã™ã€‚ ARCã®åŸºç¤Ž ARCã¨ã¯ プãƒã‚°ãƒ©ãƒžãƒ¼ãŒæ„è˜ã—ã¦ã„ãªãã¦ã‚‚ã€Swift(ã®ã‚³ãƒ³ãƒ‘イラ)ãŒARC(Automatic Reference Counting)ã¨ã„ã†ä»•çµ„ã¿ã‚’使ã£ã¦ãƒ¡ãƒ¢ãƒªé ˜åŸŸç®¡ç†ã‚’ã—ã¦ãã‚Œã¾ã™ã€‚ ã‚‚ã‚„ã—プãƒã‚°ãƒ©ãƒžãƒ¼ãŒé£¯ã‚’食ã£ã¦ã„ã‘ã‚‹ã®ã‚‚ARCã®ãŠã‹ã’ã§ã™ã€‚ ARCã¯ã€åŸºæœ¬çš„ã«ä»¥ä¸‹ã®ãƒ«ãƒ¼ãƒ«ã«åŸºã¥ã„ã¦ãƒ¡ãƒ¢ãƒªé ˜åŸŸã‚’管ç†ã—ã¾ã™ã€‚ å‚照型(クラスã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã¨ã‚¯ãƒãƒ¼ã‚¸ãƒ£ãªã©)ã®ã¿ã‚’対象ã«ã™ã‚‹ インスタンスを生æˆã—ãŸæ™‚ã«ãƒ¡ãƒ¢ãƒªç©ºé–“を確ä¿ã™ã‚‹ ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ãŒ å¿…è¦ ãªé–“ã¯ã€
æ—¢å˜ã® Objective-C ã®ãƒ¡ã‚½ãƒƒãƒ‰å¼•æ•°ã® Swift 上ã§ã®æ‰±ã‚れ方を調ã¹ã¦ã¿ãŸ
å‰ç½®ã ã“ã¡ã‚‰ã®è¨˜äº‹ã«ã¯2014/06/09ç¾åœ¨ã€å…¬å¼ã«ã¯ãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¦ã„ãªã„iOS8プレリリースドã‚ュメントã¸ã®ãƒªãƒ³ã‚¯ãŒå«ã¾ã‚Œã¾ã™ã€‚iOS8ã«ã¦æ–°ã—ãè¿½åŠ ã•ã‚ŒãŸå†…容ã«ã¯ä¸€åˆ‡è§¦ã‚Œã¦ãŠã‚‰ãšAppleã¨ã®NDAè¦ç´„ã«ã‚‚é•åã™ã‚‹ã‚‚ã®ã§ã¯ãªã„ã¨ã„ã†èªè˜ã§ã™ãŒã€å ´åˆã«ã‚ˆã‚Šäºˆå‘Šãªã削除ã™ã‚‹å¯èƒ½æ€§ãŒã‚ã‚Šã¾ã™ã€‚予ã‚ã”了承ãã ã•ã„。 本題 iOS8プレリリースドã‚ュメントを眺ã‚ã¦ã„ã¦æ°—ã«ãªã£ãŸã®ã§ã™ãŒã€ã»ã¨ã‚“ã©ã®Cocoaã®ãƒ¡ã‚½ãƒƒãƒ‰ã®å¼•æ•°ã«!ãŒã¤ã„ã¦ã„ã¾ã™ã€‚例ãˆã°NSKeyValueObservingプãƒãƒˆã‚³ãƒ«ã®addObserver:forKeyPath:options:context:メソッドã®ã‚·ã‚°ãƒãƒãƒ£ã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ func addObserver(_ anObserver: NSObject!, forKeyPath keyPath: String!, options options
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