RxSwift Driver

RxSwiftのDriverについてpotatotips #28で発表した際のスライドです http://connpass.com/dashboard/

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10. validatedUsername = input.username .flatMapLatest { username in return validationService.validateUsername(username) .observeOn(MainScheduler.instance) .catchErrorJustReturn(.Failed(message: "Error contacting server")) } .shareReplay(1) %SJWFS͡Όͳ͍ύλʔϯ ೖྗ͞ΕͨϢʔβʔ໊ͷόϦσʔγϣϯΛߦ͍ͬͯΔՕॴ
11. func validateUsername(username: String) -> Observable<ValidationResult> { if username.characters.count == 0 { return Observable.just(.Empty) } // this obviously won't be if username.rangeOfCharacterFromSet(NSCharacterSet.alphanumericCharacterSet().invertedSet) != nil { return Observable.just(.Failed(message: "Username can only contain numbers or digits")) } let loadingValue = ValidationResult.Validating return API .usernameAvailable(username) .map { available in if available { return .OK(message: "Username available") } else { return .Failed(message: "Username already taken") } } .startWith(loadingValue) }
12. enum ValidationResult { case OK(message: String) case Empty case Validating case Failed(message: String) } 7BMJEBUJPO3FTVMU
13. validatedUsername = input.username .flatMapLatest { username in return validationService.validateUsername(username) .asDriver(onErrorJustReturn: .Failed(message: "Error contacting server")) } %SJWFSύλʔϯ
14. validatedUsername = input.username .flatMapLatest { username in return validationService.validateUsername(username) .asDriver(onErrorJustReturn: .Failed(message: "Error contacting server")) } ൺֱ validatedUsername = input.username .flatMapLatest { username in return validationService.validateUsername(username) .observeOn(MainScheduler.instance) .catchErrorJustReturn(.Failed(message: "Error contacting server")) } .shareReplay(1)
15. validatedUsername = input.username .flatMapLatest { username in return validationService.validateUsername(username) .asDriver(onErrorJustReturn: .Failed(message: "Error contacting server")) } validatedUsername = input.username .flatMapLatest { username in return validationService.validateUsername(username) .observeOn(MainScheduler.instance) .catchErrorJustReturn(.Failed(message: "Error contacting server")) } .shareReplay(1) ൺֱ
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17. viewModel.validatedUsername .bindTo(usernameValidationOutlet.ex_validationResult) .addDisposableTo(disposeBag) %SJWFS͡Όͳ͍ύλʔϯ
18. viewModel.validatedUsername .drive(usernameValidationOutlet.ex_validationResult) .addDisposableTo(disposeBag) %SJWFSύλʔϯ
19. ൺֱ viewModel.validatedUsername .bindTo(usernameValidationOutlet.ex_validationResult) .addDisposableTo(disposeBag) viewModel.validatedUsername .drive(usernameValidationOutlet.ex_validationResult) .addDisposableTo(disposeBag)
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