rx-swift

I would like to have a UITextField configured with RxSwift/RxCocoa so that it only contains up to ... characters. I do not want to use the UITextFieldDelegate for this but would love to achieve this with RxSwift/RxCocoa. Is there a way to do this? Sure: textField.rx.controlEvent(.editingChanged).subscribe(onNext: { [unowned self] in if let text = self.textField.text { self.textField.text = String(text.prefix(40)) } }).disposed(by: disposeBag) In this example, the textfield is limited to 40 characters. Edit: Keeping the previous value when the limit is reached. textField.rx.text.orEmpty .scan("

Let's say I have an instant messaging app that plays a beep sound every time a message arrives. I want to debounce the beeps, but I'd like to play the beep sound for the first message arrived and not for the following ones (in a timespan of, say, 2 seconds). Another example might be: my app sends typing notifications (so the user I'm chatting with can see that I'm typing a message). I want to send a typing notification when I start typing, but only send new ones in X-seconds intervals, so I don't send a typing notification for every character I type. Does this make sense? Is there an operator

I read the two way binding operator in sample code of RxSwift. func <-> <T>(property: ControlProperty<T>, variable: Variable<T>) -> Disposable { let bindToUIDisposable = variable.asObservable() .bindTo(property) let bindToVariable = property .subscribe(onNext: { n in variable.value = n }, onCompleted: { bindToUIDisposable.dispose() }) return StableCompositeDisposable.create(bindToUIDisposable, bindToVariable) } When property changed, it will notify variable, and set the variable's value, while the variable's value is set, it will notify the property. I think it will lead to endless loop...

I have three buttons and I want them to be selected only one at a time: and: etc... My approach is this: class MyController: UIViewController { @IBOutlet var buttonOne: UIButton! @IBOutlet var buttonTwo: UIButton! @IBOutlet var buttonThree: UIButton! var buttonOneIsSelected = Variable(true) var buttonTwoIsSelected = Variable(false) var buttonThreeIsSelected = Variable(false) override func viewDidLoad() { super.viewDidLoad() buttonOne.isSelected = true buttonOneIsSelected.asDriver() .drive(buttonOne.rx.isSelected) .disposed(by: disposeBag) buttonTwoIsSelected.asDriver() .drive(buttonTwo.rx

I have an array of Thing objects that I want to convert to ConvertedThing objects, using an asynchronous function that returns Observable<ConvertedThing> . I'd like to create an Observable<[ConvertedThing]> that emits one value when all the conversions have completed. How can this be accomplished? Any help much appreciated! kennytm You can use .merge() to combine the array of observables into a single observable, and then use .toArray() to get them as a list in a single event. For RxSwift 3+ use: let arrayOfObservables: [Observable<E>] = ... let singleObservable: Observable<E> = Observable