How to use async / await keywords in Swift | Swift Concurrency #3

Async and Await are the two most common keywords used in Swift Concurrency. We will use them in every video going forward - and likely multiple times per video! In this video, we will take an in-depth look into what these keywords are really doing behind the scenes. Understanding this will save you hours of debugging!
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[@KimbrellBrad]

I have looked at Async quite a bit from many different sources. This explanation "hit me in the head" or was perfect for my understanding. Thanks for this new series - it is very timely for most of us!

[@markaurelius61]

That cleared up a lot of my confusion about async await. Thanks for the extra level of detail by showing the current thread numbers.

[@Manish_Sahu]

super easily explained the topic

[@kavinda_dilshan_paramsoodi]

Did @Escaping then Combine videos came. After several months Nick explains about Async & Await. And I'm like here we go again. hehe.. Awesome work as always Nick.

[@stu7032]

Really easy to understand and useful.

[@jonothen2212]

thanks bro, this is great
helped me got rid of that purple warning

[@aayushsarikhada6]

I believe that as of now, if we call an async function insde .task{} modifier in swiftUI and in that async function we print the current thread; we get a background thread and in the closure of .task modifier we get main thread as current thread. which i found really interesting.

[@suryakantsharma6761]

Great work!! Mind-blowing. Keep it up

[@kr1s0404]

at 3:26, I laughed so hard on this hahahahaha ... great work Nick!

[@penguinwolf0125]

Simply fantastic simulation, awesome.

[@vidorahi]

If it possible you can update this for swift 6 and Observation Framework

[@tutecodes3631]

In my case when i call addAuther1() from onAppear it shows null in thread name following warning receives
Class property 'current' is unavailable from asynchronous contexts; Thread.current cannot be used from async contexts.; this is an error in Swift 6

[@brandonhopkins3438]

same. Thread.current not available in async appaz

[@BABEENGINEER]

Love this explanation! More videos like this!

[@SwiftfulThinking]

Thanks!

[@kavinda_dilshan_paramsoodi]

"If it doesn't work, I probably need a new job, but It did work" LOL... 😂😂😂😂😒😒😒

[@alexbui0609]

Great explanation!

[@bruhmoment3731]

Very well explained!

[@911gogogo]

I have an error in 08:09, and it is called "Class property 'current' is unavailable from asynchronous contexts; Thread.current cannot be used from async contexts.; this is an error in Swift 6"
What is it means?

[@emdutt4012]

use only Thread() instead of Thread. current.

[@911gogogo]

@@emdutt4012 Thanks bro

[@mrtayyabmughal7209]

Awesome Async!

[@vladislavwhatislove7156]

the best explanation! Thank you =)

[@harshyadav9220]

Mybe Simplest Video but also quite Important one.

[@GilbertLei-ih5lc]

well explained. thank you!

[@GloverCom]

Brilliant. Huge Help!

[@emdutt4012]

brother Nick, I am using Xcode 14 every time it goes background thread. for example, author1 or something 2 is in the background thread .

[@valentine1925]

good quality tutorials!

[@SwiftfulThinking]

Glad you like them!

[@Nick-gj9gz]

Best one I've seen

[@lizakryshkovskaya7412]

Great job! 🙏

[@АлексейШестаков-ь8н]

Hi, Thanks a lot for your work! I have a question here. I called function addAuthor1() several times and I never get main thread as you have. What can be the problem here? Or is it some changes in swift concurrency?

[@gibber1sh-c6w]

Me too. author1() always runs on the Main thread. Not sure why.

[@lolrie]

Same - seems like addAuthor1() runs on background thread by default

[@paulancajima]

Is there a chance await hangs forever? Is there a timeout config?

[@eamdude]

Why will it not work on macOS? Even running on Catalyst does not show any images, it seems like the URLSession calls doesn't work. If I compile for iPad it is o.k. all three different ways.

[@3ilz]

Sorry still confused as to why author2 and something2 are in the background threads even though they are being ran in a MainActor?

[@AntonR8]

Class property 'current' is unavailable from asynchronous contexts; Thread.current cannot be used from async contexts.; this is an error in Swift 6

[@andresraigoza2082]

Awesome!!! Thank you so much.

[@josemanuelortizsanchez4983]

Thanks!

[@omarko6624]

nice

[@woozoobro]

Your Joke is always funny lol

[@1slyboy]

NOTE: Class property 'current' is unavailable from asynchronous contexts; Thread.current cannot be used from async contexts.; this is an error in Swift 6
For the purpose of this tutorial the warning can be ignore, but you should avoid trying to get access to Thread.current in production. You can however still use thread.isMainThread

[@guillaumeramey]

Hi Nick, thank you for another great video ! I saw that you can add @MainActor to your class so you don't need to specify it inside the functions, is it a good practice or not ?

[@SwiftfulThinking]

Yea it is good practice, but depending on the situation. I have a whole video on GlobalActors and the @MainActor later in this series!

[@WJCNWJCN]

Task.sleep(for:tolerance:clock:) in iOS 16 is nicer than Task.sleep(nanoseconds:) in iOS 13.

[@mamazur]

.onAppear{ Task{ await viewModel.addAuthor1 No 'async' operations occur within 'await' expression What is going on? Please help

[@hashcat5721]

The author has an error, we do not get into the main stream.
line 37 - to be moved to await MainActor.body { }
await MainActor.run(body: {
let author2 = "Author2 : \(Thread.current)"
self.dataArrat.append(author2)
let author3 = "Author3 : \(Thread.current)"
self.dataArrat.append(author3)
})