Realm meetup Japan #17

- Realm Objective-C/Swift 1.0.2
- RxRealm

Transcript

1. Realm meetup #17 kk@realm.io
2. Katsumi Kishikawa Realm Inc. kk@realm.io
3. Recent Updates kk@realm.io
4. Recent Updates • Realm Objective-C/Swift 1.0.2 (was 1.0.1) • Realm Java 1.1.0 (was 1.0.1) • Realm React Native 0.14.0 (was 0.13.0) • Realm Xamarin 0.76.0 jp@realm.io jp@realm.io
5. Realm Objective-C/Swift 1.0.2 (was 1.0.1) kk@realm.io
6. Realm Objective-C/Swift 1.0.2 • ϓϩύςΟ͕ଘࡏ͠ͳ͍ΫϥεΛอଘ͠Α͏ͱ͢Δͱྫ֎ʹ • write(_:)ϝιουͷϒϩοΫ಺ͰthrowͰ͖ΔΑ͏ʹ • όΠφϦαΠζ͕গ͠ݮগ • addNotificationBlock(_:, change:)Ͱॳճͷݺͼग़͠͸ඞ ͣ.Initial͕ݺ͹ΕΔΑ͏ʹ • ٯํ޲ͷؔ࿈͕มߋʹͳΔ৔߹ʹ௨஌͕ݺ͹Εͳ͍໰୊Λमਖ਼ jp@realm.io kk@realm.io
7. Already compatible with Swift 3 & Xcode 8 https://github.com/realm/realm-cocoa/issues/3796 kk@realm.io
8. Protip for Xcode 8 beta3 and Carthage kk@realm.io $ echo SWIFT_VERSION=\"3.0\">swift3.xcconfig $ XCODE_XCCONFIG_FILE=`pwd`/swift3.xcconfig \ carthage update --platform iOS --no-use-binaries
9. RxSwift & Realm kk@realm.io
10. What’s Rx? kk@realm.io
11. What’s Rx? kk@realm.io [1, 2, 3, 4, 5, 6]
12. What’s Rx? kk@realm.io [1, 2, 3, 4, 5, 6] .filter { $0 % 2 == 0 }
13. What’s Rx? kk@realm.io [1, 2, 3, 4, 5, 6] .map { $0 * 5 }
14. What’s Rx? kk@realm.io Array<T> => Observable<T>
15. RxRealm https://github.com/RxSwiftCommunity/RxRealm kk@realm.io
16. Using RxRealm kk@realm.io pod 'RxSwift' pod 'RxCocoa' pod 'RealmSwift' pod 'RxRealm'
17. RxRealm makes Realm observable kk@realm.io Realm.asObservable() Results.asObservable() List.asObservable() LinkingObjects.asObservable() AnyRealmCollection.asObservable()
18. RxRealm makes Realm observable kk@realm.io Results.asObservableArray() List.asObservableArray() LinkingObjects.asObservableArray() AnyRealmCollection.asObservableArray()
19. RxRealm makes Realm observable kk@realm.io Realm.asObservableChangeset() Results.asObservableChangeset() List.asObservableChangeset() LinkingObjects.asObservableChangeset() AnyRealmCollection.asObservableChangeset()
20. RxRealm makes Realm observable kk@realm.io Realm.asObservableChangesetArray() Results.asObservableChangesetArray() List.asObservableChangesetArray() LinkingObjects.asObservableChangesetArray() AnyRealmCollection.asObservableChangesetArray()
21. RxRealm makes Realm observable kk@realm.io Realm.rx_add() Realm.rx_delete()
22. RxRealm makes Realm observable kk@realm.io public func asObservable() -> Observable<Self> { return Observable.create {observer in let token = self.addNotificationBlock {changeset in let value: Self switch changeset { case .Initial(let latestValue): value = latestValue case .Update(let latestValue, _, _, _): value = latestValue case .Error(let error): observer.onError(error) return } observer.onNext(value) } return AnonymousDisposable { observer.onCompleted() token.stop() } } }
23. RxRealm makes Realm observable kk@realm.io public func asObservable() -> Observable<Self> { return Observable.create {observer in let token = self.addNotificationBlock {changeset in let value: Self ... observer.onNext(value) } return AnonymousDisposable { observer.onCompleted() token.stop() } } }
24. RxRealm makes Realm observable kk@realm.io public func asObservable() -> Observable<Self> { return Observable.create {observer in let token = self.addNotificationBlock {changeset in let value: Self ... observer.onNext(value) } return AnonymousDisposable { observer.onCompleted() token.stop() } } }
25. RxRealm makes Realm observable kk@realm.io public extension NotificationEmitter where Self: RealmCollectionType { public func asObservable() -> Observable<Self> { return Observable.create {...} } }
26. RxRealm makes Realm observable kk@realm.io public protocol NotificationEmitter { func addNotificationBlock(block: (RealmCollectionChange<Self>) -> ()) -> NotificationToken } extension List: NotificationEmitter {} extension AnyRealmCollection: NotificationEmitter {} extension Results: NotificationEmitter {} extension LinkingObjects: NotificationEmitter {}
27. RxRealm makes Realm observable kk@realm.io public extension NotificationEmitter where Self: RealmCollectionType { public func asObservable() -> Observable<Self> { return Observable.create {...} } }
28. Usage kk@realm.io var token: NotificationToken? func searchWithText(text: String) { token = realm .objects(Location) .filter("...") .sorted("...") .addNotificationBlock { (...) in ... tableView.reloadData() } ... }
29. Usage kk@realm.io realm .objects(Location) .filter("address CONTAINS %@", query) .sorted("identifier") .asObservable() .subscribeNext {[unowned self]results in ... }.addDisposableTo(self.bag)
30. Example kk@realm.io /* Observable<Results<Lap>> - wrap Results as observable */ realm.objects(Lap).asObservable() .map {laps in "\(laps.count) laps"} .subscribeNext {[unowned self]text in self.title = text } .addDisposableTo(bag) /* Observable<Array<Lap>> - convert Results to Array and wrap as observable */ realm.objects(Lap).sorted("time", ascending: false).asObservableArray() .map {array in array.prefix(5) } .bindTo(tableView.rx_itemsWithCellIdentifier("Cell", cellType: UITableViewCell.self)) {row, element, cell in cell.textLabel!.text = formatter.stringFromDate(NSDate(timeIntervalSinceReferenceDate: element.time)) }.addDisposableTo(bag) /* Use bindable sinks to add objects */ addOneItemButton.rx_tap .map { Lap() } .bindTo(Realm.rx_add()) .addDisposableTo(bag) addTwoItemsButton.rx_tap .map { [Lap(), Lap()] } .bindTo(Realm.rx_add()) .addDisposableTo(bag)
31. Incremental search kk@realm.io class ViewController: UIViewController, UISearchBarDelegate, UITableViewDataSource { ... func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return results.count } func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { cell = ... item = results[indexPath.row] cell.textLabel.text = ... return cell } func searchWithText(text: String) { realm .objects(Location) .filter("...") .sorted("...") .addNotificationBlock { (...) in ... } ... tableView.reloadData() } func searchBar(searchBar: UISearchBar, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool { ... searchWithText(text) return true }
32. Incremental search kk@realm.io class ViewController: UIViewController { let bag = DisposeBag() let realm = try! Realm() @IBOutlet weak var searchBar: UISearchBar! @IBOutlet weak var tableView: UITableView! override func viewDidLoad() { super.viewDidLoad() searchBar .rx_text .subscribeNext { [unowned self] (query) in self.realm .objects(Location) .filter("address CONTAINS %@", query) .sorted("identifier") .asObservable() .bindTo(self.tableView.rx_itemsWithCellIdentifier("Cell", cellType: UITableViewCell.self)) {( cell.textLabel!.text = element.address self.tableView.reloadData() }.addDisposableTo(self.bag) } .addDisposableTo(bag) }
33. Where to find us • ! Realm Japan User Group: facebook.com/groups/realmjp • ! Twitter: twitter.com/realmJapan • GitHub: github.com/realm • ! StackOverflow: ja.stackoverflow.com/questions/tagged/realm • ! Email: help@realm.io • ! Slack: slack.realm.io/ jp@realm.io kk@realm.io
34. Realm Japan User Group Facebook kk@realm.io
35. Support Chat Slack kk@realm.io
36. Ξϯέʔτ http://bit.ly/RealmJP_17 kk@realm.io
37. Questions? Katsuma Kishikawa kk@realm.io www.realm.io/jp @k_katsumi