The newest super hissatsu-waza of iOS app development

Presented at potatotips #16

謝辞

必殺技の名前を考えるのに貢献してくれたyashiganiさんにこの場を借りてお礼申し上げます。

Transcript

1. ඞࡴ ࠷৽iOSΞϓϦ։ൃ௒ɹɹٕ
2. cockscomb
4.  WATCH SPORT
 42mm Space Gray Aluminum Case with Black Sport Band
5. ඞࡴ ࠷৽iOSΞϓϦ։ൃ௒ɹɹٕ
6. ඞࡴ ΞϯϥοϓϋϦέʔϯ
7. let intLike = ["12.3", "45", "6-7-8"] let results = intLike.map { $0.toInt() } println(results) // => [nil, Optional(45), nil]
8. let intLike = ["12.3", "45", "6-7-8"] let results = intLike.map { $0.toInt() }.filter { $0 != nil }.map { $0! } println(results) // => [45]
9. let intLike = ["12.3", "45", "6-7-8"] let results = intLike.flatMap { $0.toInt().map { [ $0 ] } ?? [] } println(results) // => [45] New in Swift 1.2
10. ΞϯϥοϓϋϦέʔϯ
11. ඞࡴ ਅۭΦϖϨʔγϣϯ࢐Γ
12. class DragonOperation: NSOperation { let string: String var result: String? init(_ string: String) { self.string = string } override var asynchronous: Bool { return true } ... override func start() { if cancelled { internalFinished = true return } internalExecuting = true let queue = dispatch_get_global_queue( QOS_CLASS_UTILITY, 0) dispatch_async(queue) { self.result = self.string.lowercaseString self.internalExecuting = false self.internalFinished = true } } }
13. private var internalExecuting: Bool = false { willSet { willChangeValueForKey("isExecuting") } didSet { didChangeValueForKey("isExecuting") } } override var executing: Bool { return internalExecuting } private var internalFinished: Bool = false { willSet { willChangeValueForKey("isFinished") } didSet { didChangeValueForKey("isFinished") } } override var finished: Bool { return internalFinished }
14. let waza = DragonOperation("Z") waza.completionBlock = { if let result = waza.result { println(result) // => "z" } } waza.start()
15. let oraora = ["X", "Y", "Z"].map { DragonOperation($0) } let queue = NSOperationQueue() dispatch_async(dispatch_queue_create("Hissatsu", nil)) { queue.addOperations(oraora, waitUntilFinished: true) dispatch_sync(dispatch_get_main_queue()) { let results = oraora.flatMap { $0.result.map { [ $0 ] } ?? [] } println(results) // => ["x", "y", "z"] } }
16. ਅۭΦϖϨʔγϣϯ࢐Γ
17. ඞࡴ ΠχϡϝϨΠτόελʔ
18. let fonts = "/System/Library/Fonts" let files = NSFileManager().enumeratorAtPath(fonts)! while let path: AnyObject = files.nextObject() { println(path) }
19. struct GeneratorOfNSEnumerator<T> : GeneratorType, SequenceType { private let enumerator: NSEnumerator init(_ enumerator: NSEnumerator) { self.enumerator = enumerator } mutating func next() -> T? { return self.enumerator.nextObject() as! T? } func generate() -> GeneratorOfNSEnumerator<T> { return GeneratorOfNSEnumerator<T>(self.enumerator) } } let fonts = "/System/Library/Fonts" let files = NSFileManager().enumeratorAtPath(fonts)! for path in GeneratorOfNSEnumerator<String>(files) { println(path) }
20. let fonts = "/System/Library/Fonts" let files = NSFileManager().enumeratorAtPath(fonts)! for path in files { println(path) } New in Swift 1.2
21. ΠχϡϝϨΠτόελʔ
22. ඞࡴ γϟυ΢ɾΞΫςΟϏςΟ
23. let title = "Apple" let URL = NSURL(string: "http://www.apple.com/")! UIActivityViewController(activityItems: [title, URL], applicationActivities: nil)
24. class SharableTitle: NSObject, UIActivityItemSource { let title: String? init(title: String?) { self.title = title } func activityViewControllerPlaceholderItem( activityViewController: UIActivityViewController) -> AnyObject { return title ?? "" } func activityViewController( activityViewController: UIActivityViewController, itemForActivityType activityType: String) -> AnyObject? { if activityType == UIActivityTypePostToTwitter || activityType == UIActivityTypePostToFacebook { return title } else { return nil } } func activityViewController( activityViewController: UIActivityViewController, subjectForActivityType activityType: String?) -> String { return title ?? "" } }
25. let title = "Apple" let URL = NSURL(string: "http://www.apple.com/")! UIActivityViewController( activityItems: [SharableTitle(title: title), URL], applicationActivities: nil)
26. γϟυ΢ɾΞΫςΟϏςΟ
27. ඞࡴ ΦʔαϜϑΝϯΫγϣϯίʔϧ
28. class Awesome { func awesome(string: String) -> String { return string.uppercaseString } } let a = Awesome() Awesome.awesome(a)("Awesome") // => "AWESOME"
29. class SuperAwesome: Awesome { override func awesome(string: String) -> String { return string.lowercaseString } } let s = SuperAwesome() Awesome.awesome(s)("Awesome") // => "awesome"
30. ΦʔαϜϑΝϯΫγϣϯίʔϧ
31. ඞࡴ ΞϯϥοϓϋϦέʔϯ
    ਅۭΦϖϨʔγϣϯ࢐Γ
    ΠχϡϝϨΠτόελʔ
    γϟυ΢ɾΞΫςΟϏςΟ
    ΦʔαϜϑΝϯΫγϣϯίʔϧ
32. ඞࡴ ࠷৽iOSΞϓϦ։ൃ௒ɹɹٕ