iOS 15: How to combine Core Data and SwiftUI- Bookworm SwiftUI Tutorial 3/10

Download the completed project here: github.com/two...
Other parts in Project 11:
Introduction: www.hackingwit...
1. Creating a custom component with @Binding: • iOS 15: Creating a cus...
2. Accepting multi-line text input with TextEditor: • iOS 15: Accepting mult...
3. How to combine Core Data and SwiftUI: This video
4. Creating books with Core Data: • iOS 15: Creating books...
5. Adding a custom star rating component: • iOS 15: Adding a custo...
6. Building a list with @FetchRequest: • iOS 15: Building a lis...
7. Showing book details: • iOS 15: Showing book d...
8. Sorting fetch requests with SortDescriptor: • iOS 15: Sorting fetch ...
9. Deleting from a Core Data fetch request: • iOS 15: Deleting from ...
10. Using an alert to pop a NavigationLink programmatically: • iOS 15: Using an alert...
Wrap up and challenges: www.hackingwit...
You can find the full set of videos, along with transcriptions, challenges, tests, and more, in my free 100 Days of SwiftUI course: www.hackingwit...
Watch the full 100 Days of SwiftUI playlist here: • Hacking with iOS: Swif...

[@bobbrysonn]

This was perfect introduction to CoreData. Thank you.

[@UrbaneHobbit]

This is an excellent tutorial with a clear introduction of topics and (importantly) full explanation of functionality - both in terms of what elements are in use and what each one does. It takes me back to the original Ruby on Rails video tutorial, if anyone remembers that. This is exactly what I needed at this moment in my project, and I am excited to try this out.

[@MoSaghafian]

Your tutorials never let me down. Thank you

[@binwiederhier]

Fantastic explanation, without any fuzz and straight to the point. Thank you.👍

[@andycouto7688]

for anyone getting an error from xcode saying "cannot find type 'Student' in scope" try cleaning your build folder, derived data, close and reopen Xcode.

[@maryannadelman4438]

Tried that. Didn't work. And getting other errors too even though I followed tutorial exactly.

[@VaderPepe]

Thank you for this tutorial! Made the entire progress a lot more understandable!

[@storyxc6740]

Thank you so much Paul ! it's the best tutorial i've ever seen.

[@nat.serrano]

the best swift teacher on the planet, in the solar system, the Galaxy, the universe, the cluster universe, the matrix, the future metaverse

[@thatpolodude]

Thanks Paul, great content. Awesome teaching skills!

[@MauricioChavesDias]

Thanks for the video, Paul!

[@Kasula23]

Amazing Tutorial - Really very well explained

[@martinwolczyk891]

Thank you so much, your teaching style was extremely clear and useful to me! Brilliant

[@ClintonSiegel]

Grateful for your incredible instruction and teachings! Thank you!

[@classenalex]

Easy to understand nice to follow, thanks for the video

[@nandolambrusco]

Thank you for this excellent introduction, very good explained

[@afixithei.V]

Good tutorial. Explanation is clear

[@henrikkurka2681]

Excellent tutorial!

[@sergiocaplan1168]

Strange question. When I follow this tutorial it crashes the "Preview", but runs well on the "Simulator" and any real iOS "device." I realize that the more complex code gets, the less reliable preview becomes. Just wondering if there's any sort of workaround to get the preview to be more resilient. Thanks for this lesson

[@waytospergtherebro]

Core Data was introduced in 2005 long before the iPhone existed. It's been around even longer if you consider the fact that EOF was basically the same thing.

[@ConfidentlyRong-jo5yt]

Quick question, with SwiftData being the new hotness should I still learn core data? Also thanks for all your videos, you're truly the best.

[@justsomegaming]

Why do we make DataController to conform to ObservableObject protocol? It has no @Published properties. Same question to usage of @StateObject when we create DataController. My project works on simulator without ObservableObject/@StateObject on simulator and real device, but when I check previews I get crashes: "executeFetchRequest:error: A fetch request must have an entity". And surprisingly when I return ObservableObject/@StateObject, then previews continue to work without issues. My view that was crashing on previews was using @FetchRequest... Are these things related: ObservableObject/@StateObject/the crash? Or is it just a coincidence that adding ObservableObject/@StateObject fixes previews as well?

[@IanLeon]

I was asking myself the same question. I don't think it is actually necessary.

[@DavidNitzscheBell]

7:22 perhaps not super important, but you misspelled "description". Can't see (yet) where that variable gets used, but just in case....

[@ljunq]

If you wanted to run something right after the loadPersistenceStore to set some values from the database for the application. I was thinking an @Published variable in the DataController but I don't know how to access it if it's being set like: .environment(\.managedObjectContext, dataController.container.viewContext) Do you have any thoughts on this?

[@enricobecker9126]

Awesome!!! Awesome!!!!

[@krq999]

Why is there's no `PersistenceController:ObservableObject` in the Persistence.swift when the code is generated(project with core data checkbox selected)? Is it observable by default without ObservableObject? Can persistenceController be placed in some higher order model like appstate? Thanks

[@genericasianboi]

Can you use CoreData in swift playgrounds?

[@BeosDoc]

🙂👍🏻. For macOS SwiftUI app that would have a table of rows and columns of data loaded from a flat file, that could have 1 to more than 20,000 rows. Would you do structs or core data to hold the information? The data doesn’t need a persistent store, since it can be exported with any changes made. Sorting, filtering and rearranging columns also needed. I’m concerned about responsiveness of the UI. Thanks

[@relax_music668]

Thank you, it has taught me a lot,.👍

[@enricobecker9126]

This NSPersistentStoreCoordinator has no persistent stores (schema mismatch or migration failure). It cannot perform a save operation. How can I fix this?

[@enricobecker9126]

solved: delete the App from Simulator and Run again..

[@arnoczkyzoltan6158]

Thank You!

[@jaredsalzano]

How would I then use CoreData from AppDelegate without making a duplicate of the persistentContainer?

[@schizofennec]

Every time i hit "Add" it is adding to the list: "Optional("Ron") Optional("Weasley")" Rather than "Ron Weasley" Possible bug with new xcode 15?

[@totalchrisgaming]

Learning this because Xcode 15 Beta 4 has a glitch preventing me from using previews under SwiftData :(

[@makermake295]

Why is the managed object context on line 11 allowed to not have a type associated with it? That's the only one I've ever seen without it

[@SushiMonChicago]

Hi Paul can you create some example searchable using multiple objects like start date and end date for fetch filtering? Thanks You

[@amphortas1]

Thank you very much for this amazing tutorial. I have a question: Could you create a tutorial how to initialise / populate Core Data, for example, if I would like to have 1000 English words with translation is ready to use?

[@connorvantress8073]

How do you use coredata text editors and text labels? Like notes style app

Is core data, is love ❤️. Maybe You can do some like a virtual class-book - add student to class from search form, by line, and some stats of class (average grade, best score). That would be nice. I need some like this 😉

[@MASSILOULDMOHAND]

Excelent

[@vahid_sayad]

Isn't it a bad idea to write by viewContext?

[@AvantjerTube]

Regarding the fact that Swift and Core Data each have their own definition of "optional", I'd have to say that Core Data's use of the word is more in line with the traditional concept of something being "optional" as opposed to "required". I've always thought that Swift's use of the word "optional" was a poor choice. It is *not* in line with the traditional concept of something being "optional" as opposed to "required". This made learning about Swift optionals difficult for me because I was not able to map them to the traditional meaning of "optional".

[@saito_in_china]

I was looking for this for a thousand years . Everyone who is explain everything except this , and u dint understand how d hell should function .

[@mrslana3049]

I love you ! great! great! great!

[@izzzanaaami]

Как же плохо, когда знаешь английский на начальном уровне

[@zyrustaferbr4403]

nao eh vc que ganhou 3 copa pistão