Codable, Decodable, and Encodable in Swift | Continued Learning #21
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- Опубліковано 30 вер 2024
- Codable is one of the most powerful protocols in Swift! We use this to "decode" and "encode" data in our application. This is especially useful for downloading data from the internet, because when we download data it will come as a foreign data type (usually JSON data). We then use Codable to transform (or "decode") the JSON data into a data type that we have in our iOS application. In this video we will first learn how Codable is actually using Decodable and Encodable protocols behind the scenes to transform the data and then we will learn how to implement Codable itself!
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I'm glad that you took the approach that you did to first build up our "behind the scenes" insight by going through Decodable, then Encodable, and then, finally, Codable. Great teaching approach.
except if he forces you to do other things...
Man, awesome awesome awesome video. I can't stress it enough.. you just explained the concept in most deserving way. Thank you
Please dont stop teaching
Welcome to my channel and thank you Talha! 🥳
Awesome video. I'm surprised I've got this far. For what I'm used to, this is already 'next level' but because it's so well taught I don't feel lost.
I was doing the Swift UI tutorials in Apple Website, but I could not understand the Foundation part, however, this channel let me to understand quick and easy about Codable.
Yes this guy is god when it comes to how education should be. This sets a new standard for teaching and it’s hard for me to go back to the old teachings
Nick you just totally blew me away! I cannot believe codable is so powerful. Eliminating all that code I was like, this isn't going to work, but it does! Thank you for your clear concise
teaching methods. Ive been following every video since beginner bootcamp and you have taught me so very much!
Haha thanks for watching! Yea, Codable is super powerful :)
Thank you for your effort and kindness to explain things even under the hood! Now I finally understood the differences among decodable, encodable, and coddle!!!!!
🥳 Thanks KJ!!
FYI: if you create CodingKeys first, then init(from decoder) and encode() will be automatically written you start typing it.
You’re right! This was recently added to Swift.. when I made this video we still had to type it all manually 🥵
Thank you Nick for another great video!
Daaaaaaaamnn! Bro, the end of this video is sooo unpredictable, I thought it would be so difficult that I would spend a lot of time on it. Now I know how it works inside, and I can use it! You're a genius! Thank u soo much, love this channel
So well explained - Thx I have been struggling with Decode protocol. Not no.
Great job explaining all of this!! At first I was like WTH is going on here ...then I was like OH! I got it now
Hahaha thanks David. Yea I know we did a lot of extra coding here but otherwise I would have added "Codable" and no one would understand what was actually happening lol
I really enjoyed the journey in this video. Great work Nick.
Thanks again Paul. It's incredible how powerful Codable is haha
Thank you...
Thank you again! You have the best structured and systematic SwiftUI course out there! It’s an honour to be watching these videos!
Glad you're enjoying it :)
I have got an internship cuz of your course out here. Lots of appreciation from India. 🔥
This guy is a legend... WOW, what an explanation!!!
I get 56 bytes. I knew I was special.
Thank you very very much. 🙂
Nick you are legend!
Haha thanks Ma 🥲
The puzzle of JSON, Dictionary, Codable, CodingKeys is completed in my head. Great job!
It's all there until I go to sleep, an all that code drains out on my pillow, guuuur!
Brilliant explanation Nick,
Thank you a lot
great explanation . I m working with ios since 2013 , i came from objective C , and i never seen a good tutorial like yours. Amazing!!! Greetings from Brazil !!! 🙂
Man, you're the GOAT Swift Teacher
Thank you Nick, cool
Thanks again for watching Максим!
🎯 Key Takeaways for quick navigation:
00:34 📚 *Understanding the Codable protocol in Swift involves delving into decoding and encoding data for app usage.*
01:45 🌐 *Codable facilitates decoding JSON data from the internet into usable app data and encoding app data into JSON for internet transmission.*
03:08 🛠️ *Swift's Codable protocol automates encoding and decoding processes, simplifying data handling in apps.*
07:50 📤 *Simulating data download with mock JSON illustrates preparation for real internet data handling in Swift apps.*
18:56 🔄 *Codable protocol streamlines data conversion tasks, especially useful for managing complex data models in Swift applications.*
20:39 🔑 *Conforming to `Decodable` allows initializing a model from data, decoding it into the model.*
22:56 🛠️ *Customizing `CodingKeys` enables mapping between model properties and data keys during decoding.*
25:17 🧩 *Efficient decoding with `JSONDecoder` simplifies data processing and model initialization.*
28:18 📤 *Conforming to `Encodable` allows converting a model into JSON data.*
32:34 🌟 *`Codable` combines `Decodable` and `Encodable`, automating data decoding and encoding processes.*
Amazing!!!!
Im following along with your code but using a json file I have with over 3.500 records but after testing a series of possibilites my code is not working due to the line ...let dictionary = localData as? [String:Any]. if I put this two lets in a separated ifs the else statement of the second gets executed so I assumed the error is on the second if right.What am I missing?thank you.
Thanks for going through all that happens in the background, it makes the magic so much more enjoyable! I really enjoy your video series, thank you!
Another fabulous video. (Coffee coming!). But how do you conform to Codable if you are using a Core Data Entity as your data model (for data persistence purposes)?
Great question... well we use Codable to decode data from a foreign type (often JSON) into some sort of usable Model in our app. When we fetch items from CoreData, they are already Entities, which are Models that the app already understands. In short, we don't need to do any decoding for CoreData Entities. Some developers will still transform Core Data Entities into more universal data types, but you still wouldn't need to encode or decode.
最後神反轉，很謝謝你教了Codable在幕後倒底做了些什麼，你真的很厲害。
You're a total rockstar in the Chinese Swift community, with tutorials that are totally on point!
Heeeeeyyy bro ur legend i want the codes files u write can u give me github link for it
The bootcamp files u create in xcode 3>
according to spacebar sounds u have a magic keyboard....😜
It's bad practice not to catch errors, not to describe them, and not to show alerts or printouts in the console, do the Do-Catch statement is the best approach.
Thank you Nick , your explanation is very useful for us 🥰
Thank you so much for your way of explaining this! What a saver!
Thanks a lot Nick, you are very handsome
Thank you very much, Mr. Nick!!
Mind-blowing. Thanks
I hate you so much lool, you did all of that at the beginning and I was like, nooo I'm not gonna do all of that for every model, then BOOM!! Just Codable! 😂😂😂😂
😅 Hahaha yea I had to, otherwise you'd have no idea what was really happening under the hood lol
It's cool Codable😊 Thanks!
how do you know an array of data?
You”re very welcome bro....❤️
Oh! Soooo awesome… thank you
that is some crazy Magic!
Codable is so cool!
The end is amazing! 🤩
you done a good video!!
Thank you so much!
This is awesome!!
Really helpful
Awesome!
I am a lead iOS developer with lots of experience in Swift still, I always find something new and interesting in your videos. Just because I know something doesn’t mean I know, know something. Understanding something is an order of magnitude, better than knowing something. Thanks for your great content.
Thank you so much for spending so much time to explain the basic and root logic within the struct. The important thing is to the beginner developer, like me, who could really write the code confidently after learning your course!!!
Brilliant! Keep going!
Thank you! Will do Merrill!
This video is gold 🥇
This is Crazy how you teach Codable in 30 min, while i ve spent weeks to understand it.
👏
Wow, such a great and clear video on Codable. Nice unexpected twist at the end :)
💥💥💥
You are a true master - thanks again - again!
Lol Ole! Thanks for watching :)
The best channel on UA-cam for SwiftUI
Once again Nick is clutch asf
Tarun buddy what's up man. Haven't heard from you in a few weeks, glad you're still here 🥳
Thank you so much for such a easy videos :) :)
Hi Nick, amazing ...
Hi again Charlie!
Thanks for all your effort. ❤️❤️
Incredible!
Thanks Scott! I know there was a lot of code in this video haha
Awesome explaination. One of the must watch videos if you want to learn #Swift
Brruuhhhhhhhhhhhh 😩🙏🏿
😅😂
Who is this jayson you keep talking about? sounds like you have a crush on him/her..
Thank you so much master Nick 🥷🏻
I just wanted to say thank you to Nick for making all these contents and making them available to anyone. The concepts are explained clearly and in a easy-to-understand way.
Thanks!! 🤙
Thank you so much Nick!! 🙏🙏🙏
I am super appreciated your efforts to make these amazing tutorials which help me a lot. Nice, clear explanation in proper order. 🦸🧙♂
I would definitely recommend this channel to all of my friends who want to learn swiftUI.
Thanks! 🤓