Realm Database Tutorial for iOS

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Learn how to read and write data with Realm Database in this 20 minute quick start! Realm database is a local database solution allowing you to store and retrieve data sets on the device.
Quick Jump Links
1:30 Xcode Project Set Up
1:55 Realm Database Installation with Cocoapods
4:20 Realm Studio
9:18 Writing data
13:40 Reading data
Cocoapods install video:
• CocoaPods Tutorial - H...
Realm Database: realm.io/docs/swift/latest
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Hi I’m Chris! I’m dedicated to teaching fundamentals about how to make an app. This is important if you’re trying to land an iOS job, be a freelancer, increase or start a business with an app idea. On the site, you'll find a ton of free resources and tutorials to aid you on your journey to learn iOS development. Many people have successfully picked up Swift 4, Xcode 9 and app building from my course and materials! Here's just a sample of the success stories my students have sent in: codewithchris.com/success-sto...
#Realm #iOS #Database

Пікірлер: 126

@CodeWithChris 5 жыл бұрын

QOTD ⚡Does Realm database seem like something you could use for your app? Let me know!👇 Kick start your own app with my free 7 Day App Action Plan ➡️ bit.ly/7dplan

@MohamedAKarim 4 жыл бұрын

extremely useful and to the point tutorial, thanks so much Chris... you rock!

@CodeWithChris 4 жыл бұрын

Thank you so much! Glad you found it super useful! -Kat

@markemerson98 5 жыл бұрын

super - this saved me a ton of effort and spun me up and running with realm - bravo

@CodeWithChris 5 жыл бұрын

Awesome! Saved you some frustration and hours of sleep! -Adrien

@jesustorresreina 4 жыл бұрын

Thank you Chris, You really explain things in a very easy way to understand. Appreciate your tutoring.

@CodeWithChris 4 жыл бұрын

Thank you so much for the super nice feedback. It means a lot! -Kat

@juliocesartorrescama5661 4 жыл бұрын

Simple, what I needed. Thanks

@CodeWithChris 4 жыл бұрын

Glad it helped! Thanks for watching! - Kat

@cbotello4773 3 жыл бұрын

You are the man Chris. Perfect tutorial. Simple and elegantly done.

@CodeWithChris 3 жыл бұрын

We're so appreciative of you, CJ! Thank you so, so much! -Arthur

@Paulhotmale 5 жыл бұрын

Chris, very good intro to this type of database programming...

@CodeWithChris 5 жыл бұрын

Thank you! Which one are you gonna use now? -Adrien

@saumyadippramanik7924 5 жыл бұрын

This tutorial is awesome, Thanks!

@CodeWithChris 5 жыл бұрын

Thank you for passing by! -Adrien

@epmcj38 5 жыл бұрын

Excellent!

@swetadwivedi5384 6 ай бұрын

I started off with your Swift masterclass tutorial because I wanted to learn realm and after that I find this video of you teaching realm. Cant thank you enough for the amazing tutorials Chris!

@CodeWithChris 6 ай бұрын

Thanks for watching! I'll be sure to let Chris know :) - Iñaki

@nilaydagdemir3633 3 жыл бұрын

Extremely clear and simple explanation. Very useful. Thanks!

@CodeWithChris 3 жыл бұрын

Thanks for your kindness! :-) Glad to have you around! -Arthur

@larralapid8389 5 жыл бұрын

Awesome introductory walkthrough!

@CodeWithChris 5 жыл бұрын

Thank you! -Kat

@1stclassmedia 6 жыл бұрын

Another cracking tutorial video from Chris, well presented, clear to understand and super-easy to follow. Thanks Chris!

@pcasi94 4 жыл бұрын

thanks for the tutorial , it worked perfectly for me !

@CodeWithChris 4 жыл бұрын

Great to hear! You're welcome! - Kat

@toastrecon 5 жыл бұрын

Would it be good to create some kind of singleton for the Realm interface? Handle all of the writes and error handling behind the scenes? You could create custom methods that would handle the typical CRUD.

@richardmelville7099 5 жыл бұрын

Excellent intro to Realm!

@CodeWithChris 5 жыл бұрын

Thank you! @AdrienVillez

@rahuljamba5846 2 жыл бұрын

Thanks a Lot Chris !!!!

@CodeWithChris 2 жыл бұрын

You are so welcome, Rahul! We appreciate your support! -Arthur

@dcskinner75 5 жыл бұрын

One note for anyone following along and confused why their screen looks different when we open up the realm file for the first time. The system classes are hidden by default. "Select View -> Show system classes and properties" to make it look like the video.

@iOS_Developer_Swift 5 жыл бұрын

Man, you are awesome

@CodeWithChris 5 жыл бұрын

Thank you for the kind words! We are glad to have you with us! @AdrienVillez

@marc10uae 5 жыл бұрын

Hey Chris - another top tutorial.. would you be willing to expand on this tutorial for output to display the database or continue with the CRUD overview?

@CodeWithChris 5 жыл бұрын

Thank you for this comment. Now, we do cover Realm in our course on www.codewithchris.com. We love to publish tutorials online on KZfaq but we also need to be able to do this for the years to come! @AdrienVillez

@jachuonbass 5 жыл бұрын

Hey Chris, thanks for the nice tutorial on RealmSwift, pretty neat. Question: Do you how to get rid off that message in the console about Realm's version?

@CodeWithChris 5 жыл бұрын

Same goes with Firebase, you always get a bunch of info by default. Maybe there are some advanced options to remove those console lines but since its part of Realm, I do not know. -Adrien

@SusanSouthcott 6 жыл бұрын

Very cool Chris! As always the master of teaching. Realm seems a tad easier than SQLite and CoreData!!

@CodeWithChris 6 жыл бұрын

Yup, I tried CoreData and... I gave up in the middle at some point -Adrien

@pavunraj2449 11 ай бұрын

Thanks

@HFMediaArt 2 жыл бұрын

Chris, your tutorials are easy to follow is there any tutorial on how Realm can store sign-in/sign-up data locally?

@CodeWithChris 2 жыл бұрын

Hello, thanks for your kind words! Best if you post your question in our CodeCrew forum so that our tech support staff can guide you. Go here: codecrew.codewithchris.com. Thanks for learning with us! -Arthur

@YouTubeCatEngineer 5 жыл бұрын

Great video as always! If I have simple ordered numerical data (i.e. hour of the day vs outside temperature) does Realm handle this well or Core the better bet? I'm looking for functionality similar to vlookup in spreadsheets - I can send a time like 9:15 am (i.e. hour 9.25) and I get back the temperature at hour 9.0. Or BETTER YET I can send hour 9.25 and I get back INTERPOLATED temperature data between hours 9.0 and 10.0. Is there interpolated vlookup style query functionality built-in to either Realm or Core? Thanks so much!

@CodeWithChris 5 жыл бұрын

By Core, do you mean Core Data? I'm not familiar with vlookup but both Core Data and Realm are just storage options. It's like asking USB or DVD to send you the family photo. Just work the one you want to go with and the one that looks simpler (Realm in my opinion, plus it's 100% free) @AdrienVillez

@YouTubeCatEngineer 5 жыл бұрын

@@CodeWithChris So can core data be shared with other users of the same app on diferent devices? Say I've got some app that requires user input that is ultimately stored into arrays. If I store this array in core data will it generate a file of some kind that can be shared with another user so if they want the same inputs another user already supplied they can do so?

@CodeWithChris 5 жыл бұрын

Well Core Data is a local storage. If you want to share data with other users, you need an online database or a way to bundle all the data from Core Data and export them as CSV and send them to the other user(s).

@misran449 4 жыл бұрын

just what i needed. forgot to add "@objc" in my class initialization, then messed with the realm file in realm studio, started getting the schema error where i needed to delete the realm file so Xcode can recreate it... what a headache... thank you!

@CodeWithChris 4 жыл бұрын

You got it! You're a natural problem solver anyway. -Arthur

4 жыл бұрын

thanks alot

@CodeWithChris 4 жыл бұрын

Most welcome! - Kat

@semirgj 5 жыл бұрын

Is there a second or next video for this tutorial perhaps adding buttons to add/delete records/cats or visualization in the app of record info? I looked and couldn’t find it if that already exists.

@CodeWithChris 5 жыл бұрын

The rest of the lessons are available on www.codewithchris.com Check it out, we have the Black Friday sales going on now. -Adrien

@user29a 2 жыл бұрын

always nice to unwrap the optional, maybe with ?? before printing out values like the file

@CodeWithChris 2 жыл бұрын

Hello, kindly post your question on our CodeCrew forum so that our technical support staff can assist you. Go here: codecrew.codewithchris.com. :) -Arthur

@noamif 4 жыл бұрын

life saver!

@CodeWithChris 4 жыл бұрын

Great to hear! - Kat

@piano2873 6 жыл бұрын

Thank you Chris. If anyone knows how to fix issue with playground not running, please let us know.

@CodeWithChris 6 жыл бұрын

Apple released an update back in June but it didn't fix those Playground crashes. The only solution for now it to close it all and reopen Xcode/Playground -Adrien

@markemerson98 5 жыл бұрын

bravo - what about how to deploy the realm db already populated with the app bundle onto the device ready for shipping? i had to seed the database after deploying which cant be the only way to get a populated db onto the device surely?

@CodeWithChris 5 жыл бұрын

Found this for you! stackoverflow.com/questions/29839740/how-to-deliver-app-with-prefilled-realm-database @AdrienVillez

@gautamkulkarni2476 4 жыл бұрын

Hi Chris..thanks for this useful and easy-to-grasp tutorial. Following your example I am trying to create a class which inherits from Object. But, when I am trying to create a property with type Double I get error saying 'Property cannot be marked @objc because its type cannot be represented in Objective-C'. Same for Int type. So what data-type can I use if I want to store a Double value?

@gautamkulkarni2476 4 жыл бұрын

nevermind...searched and found it..NSNumber...thanks for all the awesome tutorials again.

@CodeWithChris 4 жыл бұрын

Glad you found it! Thanks! - Kat

@LYRICS-Music-Video-Lyrics 6 жыл бұрын

I really appreciate your way of offering us free course here but other side it looks you did n't thought about your audience who want to learn with you using Pc windows.... you only looks those who have Mac. mans those who have PC windows 80% they give up because to learn xcode software total ain't Thank you Chris for Your share us Knowledge

@CodeWithChris 6 жыл бұрын

True, we are not focusing on the Windows users for the simple reason that Xcode is not a software running on this OS. Xcode was designed by Apple to run on macOS and create apps for Apple products. For Windows, you'll need to go around with some virtual machines: bit.ly/CWCWindows -Adrien

@franciscollaryora2032 4 жыл бұрын

Chris, in IOs, do you know thats is the difference between: print("URL : \( myRealm.configuration.fileURL!)") print("DEFAULT URL : \( Realm.Configuration.defaultConfiguration.fileURL!)"), Then could be differents?

@CodeWithChris 4 жыл бұрын

Hello, i think the default url save could be different from an url taken from a realm object, you might need to test it out yourself though - Francis

@shubhamtunwal7363 4 жыл бұрын

Great

@CodeWithChris 4 жыл бұрын

Thank you! 🙌 - Kat

@atoxorbaladze7216 5 жыл бұрын

Great tutorials. I created class for Realm database and I added init method there, but there is an error: 'required' initializer 'init()' must be provided by subclass of 'Object'' any ideas?

@atoxorbaladze7216 5 жыл бұрын

import Foundation import RealmSwift class Question: Object { @objc dynamic var questionText:String @objc dynamic var possibleAnswers:Array @objc dynamic var correctIndex: Int init(questionText: String, possibleAnswers:Array, correctIndex: Int){ self.questionText = questionText self.possibleAnswers = possibleAnswers self.correctIndex = correctIndex } func getText() -> String { return self.questionText } func getPosAnswers() -> Array { return self.possibleAnswers } func getCorrectIndex() -> Int { return self.correctIndex } }

@CodeWithChris 5 жыл бұрын

in my own project (using Realm) I have my initializer like this: "public required init(....." @AdrienVillez

@ken0bey401 3 жыл бұрын

Which options do I have to show Data (for example in football League tables or liver ticker) in real time?

@CodeWithChris 3 жыл бұрын

You have tons of options when it comes to APIs out there. Here by just Googling Sport API i was able to find article like this one: rapidapi.com/blog/best-sports-apis-ranked/ We have tutorials to explain how to fetch data from the web and from APIs to then display inside an app. You can visit www.codewithchris.com for more tutorials, especially the database course we offer. @AdrienVillez

@CodeWithChris 3 жыл бұрын

Hello, as Adrien mentioned you can get live data from some API source, you can check out our Alamofire tutorial to make it easier to open urls codewithchris.com/alamofire/ - Francis

@kelvinjou4582 4 жыл бұрын

CHRIS HOW DO YOU DO IT ON SWIFTUI??? I DON'T KNOW HOW TO DO THE FORMAT THE STUFF ON 8:00... can you please helppp... it keeps sending back errors... :( Thank you so much

@CodeWithChris 4 жыл бұрын

Hello, it should be the same, did you install the pods for it first? also this video is a bit old so there may be some changes, try checking the documentation to be sure - Francis

@Paulhotmale 5 жыл бұрын

Chris, trying to setup CocoaPods, I have started a new xcode Project, however, I cannot see the PodFile in the new project... how is this achieved?

@CodeWithChris 5 жыл бұрын

Are you using the pod install command? In your pod file, make sure you write the right ' sign. I know European keyboards have a slightly more curly one and that would not work. -Adrien

@Paulhotmale 5 жыл бұрын

Done it started again... and it works thanks...

@RyuuzakiJulio 6 жыл бұрын

Waiting for a CloudKit database one. With relationships and filtered queries

@CodeWithChris 6 жыл бұрын

Thanks for the suggestion!

@CodeWithChris 6 жыл бұрын

This is on our list, we just start with Firebase because it gives developers to go cross platforms.

@RyuuzakiJulio 6 жыл бұрын

CodeWithChris yeah definitively I’ve heard about fire base but they don’t support MacOS apps. Any suggestion for a iOS/MacOS database with notifications?

@CodeWithChris 6 жыл бұрын

OK! Keep an eye on our channel and we will make sure to post a CloudKit tutorial on it! (I myself have to implement it into an app I'm building to make sure all data sync painlessly between devices - Maybe I'll be doing the tutorial!) -Adrien

@RyuuzakiJulio 6 жыл бұрын

CodeWithChris I am a subscriber and bell clicked. Always jump when I see you upload something. Love the tones of your videos.

@user29a 2 жыл бұрын

In production code this try! Realm() thing you're doing would eventually be a big headache. Spend the five minutes to at least use " try? " and then throw an alert if the Realm object is nil. Then you have a much better bug report than "i dunno why but it crashes on startup, 1 star"

@CodeWithChris 2 жыл бұрын

Thanks for your insight! -Arthur

@myrickchow3039 2 жыл бұрын

I think we can no longer run the app while the Realm Studio is opening the default.realm file stored at the simulator directory. It throws an error of: `Encrypted interprocess sharing is currently unsupported.DB has been opened by pid: 34228. Current pid is 34334.`

@CodeWithChris 2 жыл бұрын

Thanks for sharing this! -Arthur

@briefinsight8758 4 жыл бұрын

big like

@CodeWithChris 4 жыл бұрын

Thank you! 🙌 - Kat

@sourPollo 3 жыл бұрын

Question 🙋‍♂️. If I want to authenticate users for registration / log in, do I need the platform as a whole (mongobd atlas) or just realm?

@CodeWithChris 3 жыл бұрын

"Hello, depends on where you put the userrs database, but if you have an offline copy you can use it to authenticate there instead, we don't really recommend realm much anymore and we have since moved to CoreData or Firebase, you can check out our channel playlist for those videos - Francis"

@sourPollo 3 жыл бұрын

@@CodeWithChris thank you.

@nolainecrusher6475 4 жыл бұрын

when I use the 'pod install' command (I have changed to my own custom directory) I get the following error: [!] Invalid `Podfile` file: undefined method `Pod' for #. # from /Volumes/CSW External/XCode Experiments/realmdemo/Podfile:10 # ------------------------------------------- # > Pod 'RealmSwift' # # ------------------------------------------- I'm not sure whether or not this is connected to the fact that when I use the 'pod setup --verbose' command from the Cocoapods setup video, nothing happens. Is this because I'm working with a newer version of Cocoapods than the videos and tutorials account for?

@staz12345 4 жыл бұрын

you've gotta go into your pod file and decapitalize your pod entry

@vandamieespadero6633 4 жыл бұрын

Is it possible to use MySQL as my database using swift?

@CodeWithChris 4 жыл бұрын

Yes, we have a series of tutorials here kzfaq.info/sun/PLMRqhzcHGw1bOg4dMTxD2uN5M6VI7Sm5a - Kat

@vandamieespadero6633 4 жыл бұрын

CodeWithChris thank you very much!!!

@aswinbabu4004 5 жыл бұрын

pod init command is not working..what to do? please help ..

@CodeWithChris 5 жыл бұрын

What's the exact error message that you get? If you have one, use it in the Google search bar and you should find the solution online. @AdrienVillez

@zenithacademy4588 2 жыл бұрын

platform :ios, '12.0' target 'test' do # Comment the next line if you don't want to use dynamic frameworks use_frameworks! # Pods for test pod 'RealmSwift', '~>10' end this is the content of my podfile ,i am getting screen full of errors. try everything but could not success. please help!

@CodeWithChris 2 жыл бұрын

Hi, kindly post your question in our CodeCrew forum so that our tech support staff can assist you. Go here: codecrew.codewithchris.com. Thanks for learning with us! -Arthur

@sirajtk6054 4 жыл бұрын

how can i save ad retrieve image

@CodeWithChris 3 жыл бұрын

Hi! Can you kindly head over to our forum community so that our technical support staff can assist you regarding this? codecrew.codewithchris.com :-) Thanks a ton! -Arthur

@nawafkhalid6498 4 жыл бұрын

Hi chris I'M trying to install Realm But some errors happen can you please help me ? ### Error ``` JSON::ParserError - 767: unexpected token at '' ................

@CodeWithChris 4 жыл бұрын

Hello, maybe check the documentation of realm if anything changed, its a bit of an old video so it may be outdated now, you can also try posting on our community forum at codecrew.codewithchris.com - Francis

@md.tipusultan9629 2 жыл бұрын

When i build it shows build failed and shows that Swift compiler error. 34 errors.

@CodeWithChris 2 жыл бұрын

Hello, kindly post your question on our CodeCrew forum so that our tech support can give you insights about this. Go here: codecrew.codewithchris.com. Thank you! -Arthur

@needmore7249 6 жыл бұрын

PLZ Making video how to get video from json plz plz

@CodeWithChris 6 жыл бұрын

It is on the list of future videos for KZfaq. Now if you are interested, we do have a course for beginners on our website where we teach how to code a couple of videos and fetch data over from a JSON file. -Adrien

@needmore7249 6 жыл бұрын

CodeWithChris if your course have How to I can get video from url into app I will Buy Very soon

@louismefor9539 5 жыл бұрын

Mine just gets stack at "installing realm(3.7.6)" can someone help please

@lukee386 6 жыл бұрын

I can never get Realm to work. I've tried before but always get this error: error: open /Users/Luke/Library/Developer/Xcode/DerivedData/realmTest-hbitvkndjjwpcrcymqxdqpwvxmfw/Build/Products/Debug-iphonesimulator/Realm/Realm.framework/Headers/RLMPlatform.h: Permission denied Does anyone know what is wrong?

@CodeWithChris 6 жыл бұрын

Are you admin of your computer?

@lukee386 6 жыл бұрын

yeah I am

@CodeWithChris 6 жыл бұрын

It is difficult for me to guess what is wrong with a project like this. Please share code and screenshots with us here: bit.ly/CWCCommunity (see, I nearly missed your reply here) -Adrien

@lukee386 6 жыл бұрын

Found a fix! You need to find the RLMPlatform.h file and just put any text in there. I just put a comment and then it should compile fine. More info: github.com/realm/realm-cocoa/issues/5840

@heshanyodagama8886 4 жыл бұрын

😍😍😍😍😍

@CodeWithChris 4 жыл бұрын

🙌🙌 -Kat

@MorganMath314 5 жыл бұрын

I have an older machine (running El Capitan, Xcode 8.2, and Swift 3.0.2). I had to change the line in the pod file to say "pod 'RealmSwift', '3.4.0' '' to install the older 3.4.0 version of Realm that works for my Xcode 8.2. ( realm.io/docs/swift/3.4.0/ ) Man, I need to buck up and buy a new machine.

@MorganMath314 5 жыл бұрын

@CodeWithChris - I noticed your video show that you loaded RealmSwift 3.4.0 as well. Was this done on an old machine? Why did you not get the latest RealmSwift (3.16.1)? Also, mine does not build. I tried using Realm 3.4.0, 3.16.1, and even 3.3.2. None of them build - they have tons of errors. My thought is that the errors are resulting from something wrong in the setup and not necessarily from what the errors are stating. Thoughts?

@CodeWithChris 5 жыл бұрын

Hello again Russell. What hardware are you running? Yes, trying to get older versions of 3rd party API and SDKs like this is a big Trial and Error fight... Feel free to post your question on our support group, it will be easier to help you! bit.ly/CWCCommunity @AdrienVillez