Observing UITextField.editing with RxSwift

Question

I want to observe the property UITextfield.editing. I'm using this code:

self.money.rx_observe(Bool.self, "editing").subscribeNext { (value) in
    print("")
}.addDisposableTo(disposeBag)

But in the process of running, it's only performed once. How do I solve this，please

score 55 · Accepted Answer · edited Feb 01 '18 at 07:29

Don't observe the editing property, because it's not just a stored property. It's defined as:

public var editing: Bool { get }

So you don't know how UIKit is actually getting that value.

Instead, use rx.controlEvent and specify the control events you're interested in, like so:

textField.rx.controlEvent([.editingDidBegin, .editingDidEnd])
    .asObservable()
    .subscribe(onNext: { _ in
        print("editing state changed")
    })
    .disposed(by: disposeBag)

score 16 · Answer 2 · edited Oct 26 '17 at 11:31

16

For RXSwift 3.0

textField.rx.controlEvent([.editingDidBegin,.editingDidEnd])
        .asObservable()
        .subscribe(onNext: {
            print("editing state changed")
        }).disposed(by: disposeBag)

edited Oct 26 '17 at 11:31

Aleksey Potapov

3,683
5
42
65

answered May 11 '17 at 09:02

Chirag Desai

827
8
13

1

But in this case, you can't distinguish which of the event is happened. For Swift 4.x also workes. – Oksana Dec 21 '18 at 16:22
It's an option set so you can be specific such as `.rx.controlEvent(.editingDidEnd)` – Kwaku Eshun Sep 30 '19 at 11:14

score 3 · Answer 3 · answered Jul 25 '18 at 06:07

3

Since RxSwift 4.0, there is two specific control events : textDidBeginEditing and textDidEndEditing

You can used it like this :

textField.rx.textDidEndEditing
            .asObservable()
            .subscribe(onNext: {
                print("End of edition")
            }).disposed(by: disposeBag)


textField.rx.textDidBeginEditing
                .asObservable()
                .subscribe(onNext: {
                    print("Start of edition")
                }).disposed(by: disposeBag)

answered Jul 25 '18 at 06:07

Kevin ABRIOUX

16,507
12
93
99

4

this is UISearchBar's events, not for UITextField – slxl Jul 16 '19 at 10:18
Yes. This is for `UISearchBar` events. Thanks. – McDonal_11 Nov 10 '19 at 12:49

Observing UITextField.editing with RxSwift

3 Answers3

Linked