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Questions tagged [rx-swift]

RxSwift's intention is to enable easy composition of asynchronous operations and event/data streams. Use this tag only for questions that are specific to the RxSwift - Reactive Programming paradigm, or those that require code in the language. Use the related tags [ios], [osx], [apple-watch], [cocoa-touch], and [cocoa] for (language-agnostic) questions about the platforms or frameworks.

About Rx and RxSwift

Rx is a generic abstraction of computation expressed through Observable<Element> interface.

RxSwift is a Swift version of Rx.

It tries to port as many concepts from the original version as possible, but some concepts were adapted for more pleasant and performant integration with iOS/macOS environment.

Cross platform documentation can be found on ReactiveX.io.

Like the original Rx, its intention is to enable easy composition of asynchronous operations and event/data streams.

KVO observing, async operations and streams are all unified under abstraction of sequence. This is the reason why Rx is so simple, elegant and powerful.

Resources

2149 questions
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RxSwift modify tableview cell on select

I have a table view in my app. I generated the datasource for this table using following code struct ContactNameNumberBlockStatus { var contactThumbnail: Data? var contactName : String var contactNumber: String var blockStatus :…
LynAs
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How to unsubscribe from Observable in RxSwift?

I want to unsubscribe from Observable in RxSwift. In order to do this I used to set Disposable to nil. But it seems to me that after updating to RxSwift 3.0.0-beta.2 this trick does not work and I can not unsubscribe from Observable: //This is what…
Marina
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Using retryWhen to update tokens based on http error code

I found this example on How to refresh oauth token using moya and rxswift which I had to alter slightly to get to compile. This code works 80% for my scenario. The problem with it is that it will run for all http errors, and not just 401 errors.…
tskulbru
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18
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6 answers

Two way binding in RxSwift

I read the two way binding operator in sample code of RxSwift. func <-> (property: ControlProperty, variable: Variable) -> Disposable { let bindToUIDisposable = variable.asObservable() .bindTo(property) let bindToVariable =…
leizh00701
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rxswift bind(onNext: VS subscribe(onNext:

I have 2 questions: What difference between 'bind(onNext:' and 'subscribe(onNext:'? struct Info { var index: Int? var data: String? } let infoData: BehaviorRelay = BehaviorRelay(value: Info()) var osInfo: Observable {…
dh0rmfpdlxm
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What is the difference between .subscribe and .drive

I am quite new in Reactive Programming, Here is what I'm trying .drive searchController.rx.text .asDriver() .drive(onNext: { (element) in print(element) }).disposed(by:…
Trool Destroyer
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2 answers

How to select CollectionView cell in RxSwift

I need to select the item at specific index in collection view using RxSwift.This method is not working fine. collectionView.rx.modelSelected(SearchResult.self).subscribe(onNext:{ menuItem in }).addDisposableTo(disposeBag) Can anybody help?
Mehreen
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17
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1 answer

How to manually send next signal to a observable in RxSwift?

I create an observable using the following code: let disposeBag = DisposeBag() let myJust = { (element: String) -> Observable in return Observable.create { observer in observer.on(.next(element)) …
leizh00701
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17
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2 answers

Emit an event manually in RxSwift

I'm a newbie in RxSwift and need a very basic help. Assump that I have an Observable and subscribe it like this. let source: Observable = Observable.create { [weak self] observer in guard let _ = self else { …
dummy307
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16
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3 answers

How to set RxTimeInterval for debounce in RxSwift?

Unable to set Rxtimeinterval for debounce in rxswift. My code is below. I got this error message "Cannot convert value of type 'Double' to expected argument type 'RxTimeInterval' (aka 'DispatchTimeInterval')" searchBar .rx.text // Observable…
Bikash Maharjan
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16
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1 answer

Input parameter to closure in Swift with brackets

I am going through the following tutorial on RxSwift: http://adamborek.com/thinking-rxswift/ and having trouble understanding the following pattern: searchBar.rx.text.orEmpty ------------> .flatMap { [spotifyClient] query in …
Nikita Vlasenko
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3 answers

RxSwift - withLatestFrom combining values from both observables

I want to achieve result like this: L -1-2-3------4------5-6-7-8---- R ---------A------B----------C-- O ---------A3-----B4---------C8 So basically something like withLatestFrom but combining values from both observables (like combine latest). I…
Wujo
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16
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1 answer

Simple timer with rxSwift

I'm trying to reproduce a simple timer with RxSwift. I have a pause/play button only that works for pause and resume. gameTimer = Observable.interval(1, scheduler: MainScheduler.instance) .subscribeNext({ sec -> Void…
jerrygdm
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16
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2 answers

Proper usage of RxSwift to chain requests, flatMap or something else?

First of all, I'm new to rxswift so I guess the answer is obvious however at the moment I can't find solution by myself. I have two functions: func downloadAllTasks() -> Observable<[Task]> func getTaskDetails(taskId: Int64) ->…
Wujo
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2 answers

What is the difference between PublishSubject and PublishRelay in RxSwift?

I am new to RxSwift programming. I am confused between the two while coding. Which one should be used to store datasource of table and how to decide that ?
Emtiyaj Ali
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