Adv. Swift Combine Framework: Debounce Search Optimization

[@josejimenez7502]

So rad I had no idea this was an advanced concept in Swift, I've just begun learning this within the past two weeks, and Combine really helped me understand how to hit an API and bring data into the application.

[@CuriosMindDIY]

Something’s changed in the apple API this code doesn’t work no more :/

[@LetsBuildThatApp]

Yeah, unfortunately Combine syntax changed significantly after beta.

[@Omeir34]

Exactly what's the new code?

[@rajanmaheshwari]

I just created the publisher globally and assigned the same to the global variable and it worked. class YourVC { var publisher: AnyCancellable! func yourFunction() { self.publisher = //the code in the video } } Also in viewWillDissappear I cancelled the publisher.

[@avazbekolimov5739]

THANKS you for both source code and great explanation of combine!!!

[@rahuljamba5846]

Thanks a lot for sharing this excellent tricks.❤️👍

[@drinknation7260]

Absolutely killing it with these videos. Liking the advanced content and the comedy.

[@sreekanthiragam2305]

@bryan why we need to use sync chain call when map is going to provide the closure of the returned string values.

[@brazo98]

Dude thx a lot for your movie! Dude is something happen with your microphone? Hell, it comes and goes! Ok no problem! Thanks for you all cool movies! Nice weekend.

[@LetsBuildThatApp]

Can you tell me which part of the clip has bad audio?

[@RhLCali]

Good stuff Brian. Also if you want to avoid the explicitly unwrapping the notification object you can use compactMap _ = NotificationCenter.default.publisher(for: UITextField.textDidChangeNotification, object: textField) .compactMap{ ($0.object as? UITextField)?.text } .debounce(for: 0.5, scheduler: RunLoop.main) .removeDuplicates() .sink { print("Search text:", $0) }

[@donathmm3881]

What does compactMap

[@alileventkeskinalemdag5728]

I tried your code but it seems it doesn't work anymore. I don't know why. There is nothing happening when I typing.

[@rajanmaheshwari]

Somewhere in Rx let searchResults = textFieldSearch.rx.text.orEmpty.skip(1) .debounce(0.5, scheduler: MainScheduler.instance) .flatMapLatest { query -> Observable in { //Your Business Logic } Apple is just mimicking the RxSwift's behaviour. Thanks for the video.

[@LetsBuildThatApp]

Indeed, Rx team did a great job ushering in these concepts. Now it'll be a standard.

[@michalziobro1984]

They should have done this as Android gets Live Data and observable etc.

[@priceringo1756]

Thanks for the Combine video. Instead of mapping every notification event to a string and then debouncing that stream of strings, it would be more efficient to debounce the notification event publisher and then convert the notification to a string (once).

[@LetsBuildThatApp]

Marvelous

[@9988khan]

Hi 👋 brian nice to see you again with another video, just waiting for your video thanks from india

[@rishabhshukla725]

First thing first . I missed you alot 😂😂 seriously sir . I missed your real voice.

[@tamilselvan-cc9kp]

wow. i have been using dispatch blocks and making my logic complex for doing this same feature. This looks so simple.

[@kidrainen01]

Tank top Brain back at it!

[@bdaralan]

Awesome, been waiting for Brian to show some of the Combine stuffs.

[@bennychewDev]

Good video Brian, thanks for sharing! I like the accent at the beginning of the video. By the way: I think the chinese accent you did in prev video was Cantonese style english. :) Glad to see Combine offers very similar functionality compared to RxSwift, so learning Rx wasn't in vain up until now.

[@worldsorudecorp5650]

hi , can you print 1 2 3 4 3 2 1 with just a single for loop.. no other loop or conditional statements... its a challenge for every one

[@gjermundification]

Good one! This is also imperative for submitting a form. Such as submitting an order from shopping cart.

[@brotherlove8241]

Is it best to use pagination after searching, if the results are long?

[@LetsBuildThatApp]

Yes

[@samirdesigner3324]

thanks if make video how connect account apple with iMac and connect with xcode new way 2019 thanks

[@zainhaider6628]

i have learned a lot from you. keep making nice video!

[@Eric-bq4db]

Wow. Combine Framework fixed the RxSwift. Swift UI fixed SnapKit

[@abdouett3676]

Thanks brian! We are looking for more combine tutos plz.

[@stigblue]

RxSwift vs Combine. Thoughts?

[@w0mblemania]

Combine if you are able to require iOS 13. RxSwift if you want to support everyone. Also, Combine doesn't fully support UIKit, unlike RxSwift/Cocoa.

[@petethorne5094]

This whole demo is UIKit though? What parts are not supported?

[@w0mblemania]

@@petethorne5094 Notice that the code doesn't bind to a UIView itself; instead it relies on a subscription to a UINotification (text editing). Having to do this kind of thing for every UIKit element -- even if possible (which it's probably not) is going to be super-tedious.

[@petethorne5094]

w0mbles ah ok. And RxSwift doesn’t have this limitation?

[@w0mblemania]

@@petethorne5094 RxSwift has a companion (sub-) framework RxCocoa; it's community has provided many bindings many to UIView/UIViewControls, as well as a facility for UIView subclasses to define their own bindings. We'll have to wait and see if Apple provide anything like that, but so far, it appears that they won't be, instead preferring to concentrate on SwiftUI.

[@maxcodes]

Thank god for your channel. Everyone else's content is super basic, including my own videos haha.

[@LetsBuildThatApp]

There's often a lot more interesting gems when one digs deep enough into the apis.

[@digviju001]

Hmm good one... I'm looking to make use of this..

[@fernandoflorez8646]

It would be great if you add subtitles to your videos.

[@mukulbakshi28]

Very Knowledgable, Love it and dont be professor again.

[@LetsBuildThatApp]

I don't control the professor, the professor controls me.

[@donathmm3881]

@@LetsBuildThatApp 😂😂😂😂

[@w0mblemania]

It's such a massive shame this is (and SwiftUI) is available for iOS 13. It cuts off access for many millions of users. But since Combine is a clone of RxSwift, and Combine doesn't really support UIKit, I'm just going to use RxSwift for the next 2 to 3 years, as a bridge to the future.

[@LetsBuildThatApp]

Luckily iOS adoption is fairly fast compared to android. But still it is a whiles away.

[@bennychewDev]

I agree. It will be good to learn RxSwift now anyway imo, because Rx is also available on other platforms. The paradigm will be the same on RxJs, RxJava, etc, only slightly different syntax.

[@MubasherMurtaza]

Dear, Use single line for Search instead of search bar let value = searchValue.filter { return ($0?.name.lowercased().contains(String(sender.text!.lowercased())))! }

[@LetsBuildThatApp]

Why?

[@MubasherMurtaza]

Dear, Simple, short method & suggestions! searchValue = [Contains Data] 1--> let value = searchValue.filter { return ($0?.name.lowercased().contains(String(sender.text!.lowercased())))! } if value != []{ countries = value }else{ countries = [] } 2--> var countries{ didSet{ Reload TableData } }

[@LetsBuildThatApp]

This looks like it doesn’t use the combine framework.

[@donathmm3881]

Awesoooome

[@mmatyjaszczyk21]

Always dreamed to be first. Thats the day 😏

[@VeryBlueBot]

haha best opening ever :)

[@donathmm3881]

Please more

[@user-vl4vo2vz4f]

No documentation yet? Why bother. Apple documentation is crap.

[@shreebhagwat1009]

Don't do drugs, Drugs are bad. Mkay ,Mkay

[@gabrielrml]

Try a London accent ...mate

[@cularu1]

Rx behaviour

[@Kingkeishan]

First things first, cocaine is a hell of a drug...ok enough of British accent.......???lol wth