Recursos do iOS que talvez você não conheça!

Palestra apresentada em 03/09/2016 no Digital Day BH

Animações dos slides 36, 38 e 39:
http://imgur.com/a/oWkks

Transcript

1. Recursos do iOS que talvez você não conheça!
2. Jean Pimentel Product Engineer na CI&T Desenvolvedor mobile há 2,5 anos Leitor de ficção científica Co-organizador do Android Meetup BH e CocoaHeads BH
3. NSCache @available(iOS 4.0, *)
4. NSCache - Similar a um NSDictionary - Algoritmo de expiração é interno, possivelmente LRU - Gerenciamento automático de memória - Chave e valor são referências - Thread-safe
5. NSCache func objectForKey(key: AnyObject) -> AnyObject? func setObject(obj: AnyObject, forKey key: AnyObject) func removeObjectForKey(key: AnyObject) func removeAllObjects()
6. NSCache let cache = NSCache() cache.setObject("Jean", forKey: "name") print(cache.objectForKey("name")) // Jean
7. NSCache extension NSCache { subscript(key: AnyObject) -> AnyObject? { get { return objectForKey(key) } set { if let value: AnyObject = newValue { setObject(value, forKey: key) } else { removeObjectForKey(key) } } } }
8. NSCache let cache = NSCache() cache["name"] = "Jean" print(cache["name"]) // Jean
9. NSDataDetector @available(iOS 4.0, *)
10. NSDataDetector - Subclasse de NSRegularExpression - Detecta vários tipos de dados: - Datas, endereços, links, telefones... - Apresenta boa precisão
11. NSDataDetector let text = "Veja mais em: http://developer.apple.com/" let detector = try NSDataDetector(types: NSTextCheckingType.Link.rawValue) let match = detector.firstMatchInString(text, options: [], range: NSRange(location: 0, length: text.utf16.count)) print(match?.URL) // Optional(http://developer.apple.com/)
12. NSDataDetector let text = "Av dos Andradas, Belo Horizonte, MG - 30260-070" let detector = try NSDataDetector(types: NSTextCheckingType.Address.rawValue) let match = detector.firstMatchInString(text, options: [], range: NSRange(location: 0, length: text.utf16.count)) print(match?.addressComponents) // Optional(["ZIP": "30260-070", "City": "Belo Horizonte", "State": "MG", "Street": "Av dos Andradas"])
13. NSDataDetector let text = "contato@jeanpimentel.com.br" let detector = try NSDataDetector(types: NSTextCheckingType.Link.rawValue) let match = detector.firstMatchInString(text, options: [], range: NSRange(location: 0, length: text.utf16.count)) print(match?.URL) // Optional(mailto:contato@jeanpimentel.com.br)
14. NSDataDetector extension String { func isEmail() -> Bool { guard let detector = NSDataDetector(types: NSTextCheckingType.Link.rawValue) else { return false } let match = detector.firstMatchInString(self, options: [], range: NSRange(location: 0, length: self.utf16.count)) return match?.URL?.scheme == "mailto" } }
15. NSDataDetector print("josé@email.com".isEmail()) // true print("ашка@ящик.рф".isEmail()) // true
16. CIDetector @available(iOS 5.0, *)
17. CIDetector - Core Image, framework de manipulação de imagens - Detecta: - Faces (5.0, *) - Retângulos (8.0, *) - QRCode (8.0, *) - Textos (9.0, *)
18. CIDetectorTypeFace @available(iOS 5.0, *) CIDetectorSmile, CIDetectorEyeBlink @available(iOS 7.0, *)
19. CIDetectorTypeFace let image = UIImage(named:"example")! let ciImage = CIImage(CGImage: image.CIImage!) let detector = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: nil) for f in detector.featuresInImage(ciImage) { guard let face = f as? CIFaceFeature else { continue } print(face.bounds) // ... }
20. CIDetectorTypeFace
21. CIDetectorTypeFace
22. CIDetectorTypeFace // ... let detector = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: nil) let options = [CIDetectorSmile: true] for f in detector.featuresInImage(image, options: options) { guard let face = f as? CIFaceFeature else { continue } print(face.bounds) // ... }
23. CIDetectorTypeFace
24. CIDetectorTypeFace
25. CIFilter @available(iOS 5.0, *)
26. CIFilter - Categorias: - Blur, ColorAdjustment, ColorEffect, CompositeOperation, DistortionEffect, Generator, GeometryAdjustment, Gradient, HalftoneEffect, Reduction, Sharpen, Stylize, TileEffect, Transition
27. CIFilter
28. CIFilter - CISepiaTone, CIColorInvert... // ... let params = ["inputImage": image] let filter = CIFilter(name: "CISepiaTone", withInputParameters: params) let output = UIImage(CIImage: filter!.outputImage!)
29. CIFilter - CISepiaTone
30. CIFilter - CIColorInvert
31. CIFilter - CIPixellate
32. CIFilter - CIColorMonochrome // ... let color = CIColor(red: 1.0, green: 0.0, blue: 0.0) let params = [ "inputImage": image, "inputColor": color ] let filter = CIFilter(name: "CIColorMonochrome", withInputParameters: params) let output = UIImage(CIImage: filter!.outputImage!)
33. CIFilter - CIColorMonochrome
34. UIImageView.startAnimating @available(iOS 2.0, *)
35. UIImageView.startAnimating - "GIFs" - Lista de UIImage, frame a frame
36. var images: [UIImage] = [] for i in 0..<8 { let name = String(format: "loading-%d", i) images.append(UIImage(named: name)!) } imageView.animationImages = images imageView.animationDuration = 0.8 imageView.animationRepeatCount = 0 imageView.startAnimating() UIImageView.startAnimating
37. UIView.transitionWithView @available(iOS 4.0, *)
38. UIView.transitionWithView label.text = " " // ... UIView.transitionWithView(label, duration: 0.5, options: .TransformationFlipFromLeft, animations: { label.text = " " }, completion: nil )
39. imageView.image = UIImage(named:"empty") // ... UIView.transitionWithView(imageView, duration: 0.5, options: .TransformationCrossDisolve, animations: { imageView.image = UIImage(named:"full") }, completion: nil ) UIView.transitionWithView
40. JavaScriptCore @available(iOS 7.0, *)
41. JavaScriptCore - Wrapper no motor JavaScript do WebKit - JSContext, equivalente à window - JSValue, tipo dinâmico, faz a tradução - ReactNative
42. JavaScriptCore let context = JSContext() context.evaluateScript("var sum = 1 + 2") context.evaluateScript("var double = function(value) { return value * 2 }") let result: JSValue = context.evaluateScript("double(sum)") print(result.toInt32()) // 6
43. JavaScriptCore context.evaluateScript("var names = ['jean', 'luiz']") let names = context.objectForKeyedSubscript("names") let firstName = names.objectAtIndexedSubscript(0) print(firstName.toString()) // jean
44. JavaScriptCore context.evaluateScript("var double = function(value) { return value * 2 }") // ... let double = context.objectForKeyedSubscript("double") let result = double.callWithArguments([5]) print(result.toInt32()) // 10
45. JavaScriptCore context.exceptionHandler = { context, exception in print(exception) } // ... context.evaluateScript("var double = function(value) { return value * }") // SyntaxError: Unexpected token '}'
46. Low Power Mode @available(iOS 9.0, *)
47. Low Power Mode - Modo de economia de bateria - iOS reduz processamentos, brilho da tela, requisições em background etc - Informação pode ser obtida diretamente ou via NotificationCenter
48. Low Power Mode if NSProcessInfo.processInfo().lowPowerModeEnabled { // evitar autoplay em vídeos // diminuir atualização do GPS // evitar requisições de rede // etc } else { // }
49. Low Power Mode NSNotificationCenter.defaultCenter().addObserver( self, selector: #selector(callMe), name: NSProcessInfoPowerStateDidChangeNotification, object: nil )
50. Dynamic Type @available(iOS 7.0, *)
51. Dynamic Type - Acessibilidade - Usuário controla o tamanho das fonts no dispositivo - ExtraSmall - Small - Medium - Large - ExtraLarge - ExtraExtraLarge - ExtraExtraExtraLarge
52. Dynamic Type - Atualmente existem 10 estilos - Title1 (9.0+) - Title2 (9.0+) - Title3 (9.0+) - Headline - Subheadline - Body - Footnote - Caption1 - Caption2 - Callout (9.0+)
53. Dynamic Type label.font = UIFont.preferredFontForTextStyle(UIFontTextStyleBody) // NSNotificationCenter.defaultCenter().addObserver( self, selector: #selector(callMe), name: UIContentSizeCategoryDidChangeNotification, object: nil )
54. CFStringTransform @available(iOS 2.0, *)
55. CFStringTransform String Transform @available(iOS 9.0, *)
56. String Transform let text = " ".stringByApplyingTransform( NSStringTransformToUnicodeName, reverse: false) print(text) // {SLICE OF PIZZA}
57. String Transform let text = "Luna".stringByApplyingTransform( NSStringTransformLatinToCyrillic, reverse: false) print(text) // Луна
58. String Transform let text = "您好".stringByApplyingTransform( NSStringTransformMandarinToLatin, reverse: false) print(text) // nín hǎo
59. String Transform let text = "您好".stringByApplyingTransform( NSStringTransformMandarinToLatin, reverse: false) .stringByApplyingTransform( NSStringTransformStripDiacritics, reverse: false) print(text) // nin hao
60. String Transform let text = "Αθήνα".stringByApplyingTransform( "Any-Latin; Latin-ASCII; Lower", reverse: false) print(text) // athena
61. Obrigado! Dúvidas?
62. Contato contato@jeanpimentel.com.br speakerdeck.com/jeanpimentel github.com/jeanpimentel