To the Core of Core NFC

NFC has been around for a while and we use it every day in things like Apple Pay but how does it work and what features are actually available for developers to use? Until recently NFC was pretty limited on iOS and devs used to struggle to find use cases they could implement in their apps. NFC itself has plenty of applications but we were not able to take full advantage of them because of these limitations but now that Apple has announced tag writing support, we have more possibilities! Some of your Android friends might tell you: “Well we have had that for a long time!” and yeah it’s true, but without Apple opening their APIs it was hard for companies to find a compelling case to build apps where only one platform was going to be supported.

In this talk, you will learn the basics of Near Field Communication such as tagging, different types of tags and their specifications. We will also take a peak to these new features and implement some of them in a quick example.

Join me to see why I think learning about the new Core NFC features are important and the long-lasting implications they will have around the world.

Transcript

1. TO THE CORE OF CORE NFC @tolkiana
2. ! HELLO! I'M NELIDA @TOLKIANA DETROIT LABS
3. WHY CORE NFC? @tolkiana
4. AGENDA > NFC Characteristics > NFC Modes > NFC Tags > NFC Data Exchange Format - NDEF > Core NFC Tag Writing > Core NFC Tag Reading @tolkiana
5. WHAT MAKES NFC DIFFERENT? @tolkiana
6. NEAR FIELD COMMUNICATION > Requires little power consumption @tolkiana
7. NEAR FIELD COMMUNICATION > Requires little power consumption > Short-range wireless communication @tolkiana
8. NEAR FIELD COMMUNICATION > Requires little power consumption > Short-range wireless communication > It can be setup for one way or two way communication @tolkiana
9. TYPES OF NFC DEVICES @tolkiana
10. PASSIVE ! <---> ACTIVE @tolkiana
11. NFC MODES @tolkiana
12. 1. TAG READER/WRITER ! @tolkiana
13. 2. PEER TO PEER !" @tolkiana
14. 3. CARD EMULATION ! @tolkiana
15. Photo by Karin Hiselius on Unsplash
16. Photo by Jamie Street on Unsplash
17. WHAT DOES THIS MEAN FOR THE LATEST RELEASE? @tolkiana
18. Mode 2017 2018 2019 Tag Reader/ writer Only NDEF Tags reading Background Reading Native Tag reading & writting Peer to Peer ! ! ! Card Emulation ! ! ! @tolkiana
19. NFC TAGS STRUCTURE @tolkiana
20. @tolkiana
21. NFC CHIP @tolkiana
22. NFC CHIP > Unique Identifier @tolkiana
23. NFC CHIP > Unique Identifier > Read/Write user memory @tolkiana
24. NFC CHIP > Unique Identifier > Read/Write user memory > PASSWORD PROTECTION @tolkiana
25. NFC TAG TYPES @tolkiana
26. IT'S VERY EASY! > Type 1 > Type 2 > Type 3 > Type 4 > Type 5 @tolkiana
27. HMM NOT REALLY > Type 1? > Type 2? > Type 3? > Type 4? > Type 5? Photo by Tadeusz Lakota on Unsplash
28. UNDERSTANDING NFC TAG TYPES Type Functionality Other characteristics Core NFC Protocols Underlying technology 1 Read only applications, Store small amounts of data such a website URL slow and cheap NFCNDEFTag ISO14443A 2 Event tickets, Badging systems The most popular, Faster than Type 1 NFCNDEFTag, NFCMiFareTag ISO14443A 3 Transit tickets, Payments, Electronic IDs, Health care devices, Home electronics Used primarily in Japan, It's more expensive NFCNDEFTag, NFCFeliCaTag ISO18092 4 Passports, Payments Most important feature it's security, Moderate to high price tag NFCNDEFTag, NFCISO7816Tag, NFCMiFareTag ISO14443A, ISO14443B 5 Retail, Industrial applications, Health care Also called Vicinity Tags, Back- end database support NFCNDEFTag, NFCISO15693Tag ISO15693 @tolkiana
29. WHAT IS NDEF? @tolkiana
30. NFC DATA EXCHANGE FORMAT @tolkiana
31. NFC DATA EXCHANGE FORMAT @tolkiana
32. NDEF RECORD @tolkiana
33. TYPE NAME FORMAT 0 Empty 1 Well-Known 2 MIME media-type 3 Absolute URI 4 External 5 Unknown 6 Unchanged 7 Reserved @tolkiana
34. NDEF RECORD @tolkiana
35. CORE NFC TAG WRITING @tolkiana
36. ! @tolkiana
37. ! > uri: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh" > Song Name: "Cheek to Cheek" > Artist: "Ella Fitzgerald" @tolkiana
38. IDENTIFY YOUR TAG Type Functionality Other characteristics Core NFC Protocols Underlying technology 1 Read only applications, Store small amounts of data such a website URL slow and cheap NFCNDEFTag ISO14443A 2 Event tickets, Badging systems The most popular, Faster than Type 1 NFCNDEFTag, NFCMiFareTag ISO14443A 3 Transit tickets, Payments, Electronic IDs, Health care devices, Home electronics Used primarily in Japan, It's more expensive NFCNDEFTag, NFCFeliCaTag ISO18092 4 Passports, Payments Most important feature it's security, Moderate to high price tag NFCNDEFTag, NFCISO7816Tag, NFCMiFareTag ISO14443A, ISO14443B 5 Retail, Industrial applications, Health care Also called Vicinity Tags, Back- end database support NFCNDEFTag, NFCISO15693Tag ISO15693 @tolkiana
39. WHAT KIND OF SESSION DO YOU NEED? NFCNDEFReaderSession // To use tag with NDEF Format NFCTagReaderSession // To use tag native features @tolkiana
40. WHAT KIND OF SESSION DO YOU NEED? NFCNDEFReaderSession -> NFCNDEFTag // To use tag with NDEF Format NFCTagReaderSession -> NFCMiFareTag // To use tag native features @tolkiana
41. DON'T FORGET YOUR ENTITLEMENTS @tolkiana
42. ADD THE NFC CAPABILITY @tolkiana
43. AND THE USAGE DESCRIPTION @tolkiana
44. NFCNDEFMessage init(records: [NFCNDEFPayload]) NFCNDEFPayload init(format: NFCTypeNameFormat, type: Data, identifier: Data, payload: Data) @tolkiana
45. @tolkiana
46. NFCTypeNameFormat typedef NS_ENUM(uint8_t, NFCTypeNameFormat) { NFCTypeNameFormatEmpty = 0x00, NFCTypeNameFormatNFCWellKnown = 0x01, NFCTypeNameFormatMedia = 0x02, NFCTypeNameFormatAbsoluteURI = 0x03, NFCTypeNameFormatNFCExternal = 0x04, NFCTypeNameFormatUnknown = 0x05, NFCTypeNameFormatUnchanged = 0x06 }; @tolkiana
47. NFCNDEFPayload class func wellKnownTypeURIPayload(url: URL) -> Self? class func wellKnownTypeTextPayload(string text: String, locale: Locale) -> Self? @tolkiana
48. NFCNDEFPayload class func wellKnownTypeURIPayload(url: URL) -> Self? class func wellKnownTypeTextPayload(string text: String, locale: Locale) -> Self? init(format: NFCTypeNameFormat, type: Data, identifier: Data, payload: Data) @tolkiana
49. BEGIN THE SESSION func beginReadingSession() { let session = NFCNDEFReaderSession(delegate: self, queue: DispatchQueue.main, invalidateAfterFirstRead: true) session.begin() } @tolkiana
50. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
51. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
52. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
53. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
54. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
55. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
56. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
57. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
58. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.write(to: tag) } } } @tolkiana
59. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
60. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
61. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
62. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
63. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
64. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
65. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
66. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
67. WRITE YOUR TAG! @available(iOS 13.0, *) private func write(to tag: NFCNDEFTag) { tag.queryNDEFStatus() { (status: NFCNDEFStatus, _, error: Error?) in guard status == .readWrite else { self.writeSession?.invalidate(errorMessage: "Tag not valid.") return } let uri = NFCNDEFPayload.wellKnownTypeURIPayload(string: "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh")! let song = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Check to Check", locale: Locale(identifier: "En"))! let artist = NFCNDEFPayload.wellKnowTypeTextPayload(string: "Ella Fitzgerald", locale: Locale(identifier: "En"))! let myMessage = NFCNDEFMessage(records: [uri, song, artist]) tag.writeNDEF(myMessage) { (error: Error?) in if (error != nil) { self.writeSession?.invalidate(errorMessage: error?.localizedDescription ?? "There was an error") } self.writeSession?.alertMessage = "Song successfully saved" self.writeSession?.invalidate() } } } @tolkiana
68. BACKGROUND TAG READING @tolkiana
69. @tolkiana
70. DEFINE AND WRITE YOUR APP SCHEME // First Write in your tag your app URI let uriPayload = NFCNDEFPayload.wellKnownTypeURIPayload(string: "nfcmusic:play:all") let myMessage = NFCNDEFMessage(records: [uriPayload!]) @tolkiana
71. REGISTER YOUR URL SCHEME @tolkiana
72. @tolkiana
73. CORE NFC TAG READING @tolkiana
74. BEGIN THE SESSION func beginReadingSession() { let session = NFCNDEFReaderSession(delegate: self, queue: DispatchQueue.main, invalidateAfterFirstRead: true) session.begin() } @tolkiana
75. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return; } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.read(tag) } } } @tolkiana
76. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return; } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.read(tag) } } } @tolkiana
77. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return; } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.read(tag) } } } @tolkiana
78. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return; } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.read(tag) } } } @tolkiana
79. DETECT THE TAG class NFCMusicWriter: NSObject, NFCNDEFReaderSessionDelegate { @available(iOS 13.0, *) func readerSession(_ session: NFCNDEFReaderSession, didDetect tags: [NFCNDEFTag]) { guard let tag = tags.first else { session.invalidate(errorMessage: "Couldn't read tag") return; } session.connect(to: tag) { (error: Error?) in if error != nil { session.invalidate(errorMessage: "Connection error. Please try again.") return } self.read(tag) } } } @tolkiana
80. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
81. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
82. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
83. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
84. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
85. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
86. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
87. READ THE TAG private func read(_ tag: NFCNDEFTag) { tag.readNDEF { (message: NFCNDEFMessage?, error: Error?) in guard error == nil else { self.session?.invalidate(errorMessage: error!.localizedDescription) return } guard let message = message else { self.session?.invalidate(errorMessage: "There's no message") return } self.decoder.decode(message) self.session?.alertMessage = "Message successfully read" self.session?.invalidate() } } @tolkiana
88. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
89. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
90. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
91. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
92. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
93. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
94. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
95. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
96. DECODE YOUR MESSAGE! class NFCMessageDecoder { func decode(_ message: NFCNDEFMessage) -> [String] { return message.records.compactMap { record in return self.decode(record) } } private func decode(_ record: NFCNDEFPayload) -> String? { let type = PayloadType(rawValue: record.type.decode()) switch type { case .url: // Raw value: "U" return record.wellKnownTypeURIPayload()?.absoluteString case .text: // Raw value: "T" return record.wellKnownTypeTextPayload().0 default: return nil } } } @tolkiana
97. READY TO LISTEN // This is the decoded NFCNDEFMessage let song = [ "spotify:track:33jt3kYWjQzqn3xyYQ5ZEh", // this was a payload of type URI "Cheek to Cheek", // this was a payload of type Text "Ella Fitzgerald" // this was a payload of type Text ] @tolkiana
98. TAKEAWAYS @tolkiana
99. TOOLS @tolkiana
100. TOOLS > You need an iPhone 7 or newer @tolkiana
101. TOOLS > You need an iPhone 7 or newer > For Background reading iPhone XS @tolkiana
102. TOOLS > You need an iPhone 7 or newer > For Background reading iPhone XS > You need to install iOS 13 Beta @tolkiana
103. TOOLS > You need an iPhone 7 or newer > For Background reading iPhone XS > You need to install iOS 13 Beta > NFC Tags @tolkiana
104. TAGS @tolkiana
105. TAGS > NDEF is great to store simple data @tolkiana
106. TAGS > NDEF is great to store simple data > Sophisticated features require learn specific standards @tolkiana
107. FUTURE @tolkiana
108. FUTURE > Core NFC is still limited @tolkiana
109. FUTURE > Core NFC is still limited > But I'm still excited and hoping for the future @tolkiana
110. WHAT ELSE DO YOU THINK CAN WE DO WITH CORE NFC? @tolkiana
111. @TOLKIANA HTTPS://GITHUB.COM/TOLKIANA/ NFCMUSIC Photo by Howard Riminton on Unsplash