What's new in CloudKit and building apps without your own server.

Presentation on CocoaHeads Hong Kong's 2016 July meet up.

Transcript

1. What’s New in CloudKit Building apps without your own server Simon Pang
2. @simonpang Hi, I’m Simon Pang GoodNotes iOS macOS
4. What’s New in CloudKit?
5. https://developer.apple.com/videos/play/wwdc2016/226/
6. What’s CloudKit?
8. What’s CloudKit for?
9. https://www.youtube.com/watch?v=rnzCnPSQM7c Apple WWDC 11 Keynote- iCloud- Contacts, Mail, Calanders, Apps, Books, Backups "It Just Works"
10. CloudKit = Cloud + Kit
11. Notes Photos News iCloud Document Where CloudKit is used by Apple?
12. CloudKit vs Conventional Backend CloudKit Conventional App centric Server/API centric Generic Apple server App specific server No server logics allowed Your own server logics Users have control Server have control
13. Why CloudKit?
14. Swift Xcode gem install npm install
16. Private Database
17. https://developer.apple.com/icloud/ Free!
18. https://developer.apple.com/icloud/ Free (kind of)
19. CloudKit Features • Query • Fetch Database Change • Subscription • Asset • Long Live Operations • Sharing • CloudJS
20. Getting Started
21. Container ID iCloud.com.$(your company).$(product name)
27. Creating Records
28. let container = CKContainer.default() let database = container.publicCloudDatabase
29. let record = CKRecord(recordType: "Todo") record["title"] = “This is a title!”
30. let op = CKModifyRecordsOperation( recordsToSave: [record],recordIDsToDelete: nil) op.perRecordCompletionBlock = { (record, error) …} database.add(op)
31. struct Todo { var identifier: CKRecordID var title: String } let database = ... func createTodoRecord(title: String, completionHandler: (Todo, NSError?)->()) { let record = CKRecord(recordType: "Todo") record["title"] = title let op = CKModifyRecordsOperation(recordsToSave: [record], recordIDsToDelete: nil) op.perRecordCompletionBlock = {...} database.add(op) }
34. Handling Account Status
35. func cloudKitStartup() { container.accountStatus { (status, maybeError) in if let error = maybeError { // handling } switch status { case .available: // handling case .restricted: // handling case .noAccount: // handling case .couldNotDetermine: // handling } } }
36. class CloudKitManager { var operationQueue = OperationQueue() init() { operationQueue.isSuspended = true // suspended until account status is available container.accountStatus {(status, maybeError) in switch status { case .available: operationQueue.isSuspended = false case ...: // usual handling } } }
37. struct Todo { var identifier: CKRecordID var title: String } let database = ... func createTodoRecord(title: String, completionHandler: (Todo, NSError?)->()) { let record = CKRecord(recordType: "Todo") record["title"] = title let op = CKModifyRecordsOperation(recordsToSave: [record], recordIDsToDelete: nil) op.perRecordCompletionBlock = {…} op.database = database operationQueue.addOperation(op) }
38. Data Modeling
39. What can you put inside CKRecord? • NSString, NSNumber, NSDate, NSData • CLLocation • CKAsset • CKReference • NSArray containing objects of any of the types above
40. Notes Folders Attachments Notes
41. class ICFolder { var titleEncrypted: NSData // ... } class ICNote { var titleEncrypted: NSData var snippetEncrypted: NSData var folders: [CKReference] var deleted: Bool var modificationDate: Date // ... var firstAttachmentThumbnail: CKAsset? var firstAttachmentThumbnailOrientation: Int? var firstAttachmentUTIEncrypted: NSData? }
42. class ICAttachment { var media: CKReference var height: Double var width: Double var UTIEncrypted: NSData var note: CKReference var titleEncrypted: NSData var previewHeights: [Double] var previewWidths: [Double] var previewImages: [CKAsset] var previewScales: [Double] var previewScaleWhenDrawings: [Double] var previewUpdateDate: Date var deleted: Bool var lastModificationDate: Date var fileSize: Int // ... }
43. class ICMedia { var asset: CKAsset var deleted: Bool var filenameEncrypted: NSData }
44. Sharing (iOS 10 and macOS 10.12)
45. Sender
46. Recipient
47. How it works (for sender)? • CKShare • UICloudSharingController • CKModifyRecordsOperation • Send out the URL
48. How it works (for recipient)? • NSURL -> CKShareMetadata • CKFetchShareMetadataOperation OR • userAcceptedCloudKitShareWithMetadata: • CKAcceptSharesOperation
49. Gotcha! • Handle version conflict • Handle rate limit exceed • Private/Public/Shared databases are not the same • Dashboard user limitation
50. Recap • What’s new in CloudKit • What’s CloudKit • Getting Started • Data Modeling • Sharing
51. References • Apple iCloud Resources • https://developer.apple.com/icloud/ • WWDC CloudKit sessions • https://developer.apple.com/videos/play/wwdc2016/226/ • https://developer.apple.com/videos/play/wwdc2016/231/ • https://developer.apple.com/videos/play/wwdc2015/715/ • YapDatabase • https://github.com/yapstudios/YapDatabase
52. Thanks! @simonpang hksimon@gmail.com simon@goodnotesapp.com