Core-data Questions

What is the difference between both error code when saving core data? reading from some posts, both of them refer to same error description: the

I am using core data in my application. i am getting this error when using transformable attribute to store nsarray. in short i

I do get a json and parse it to my model. in order to use this data while i am offline, i do store it using core data. for this, i created an

My app currently uses a navigationlink to open a view like this: lazyvgrid(columns: gridlayout, spacing: 10) {

I am planning to make a mobile application for both ios and android. first, i would like to make the ios version of the app. i am planning to use

I've tracked down an annoying bug in my code and managed to recreate the issue using xcode's default ios app as a starting point and adding a few

If the conversation has already started, then i fetch messages from firebase using the last message in the cache, as

I am using an imagepicker to select an image from library and store in coredata (as binary). in another view this selected image is shown as a

In ios 14 i've following code which prefills all textfields from the coredata model struct editsimplesearchview: view {

Just found out that building an app with the new ios 15 sdk (xcode 13 rc) is no longer backward compatible with ios 14.x targets when using

I'm setting a date to a certain birthdaytextfield like so @objc func birthdaydatepickervaluechanged(sender: uidatepicker) {

I have uicollectionviewcontroller with <nsfetchedresultscontrollerdelegate> and coredata singleton

So far i can create my own data models in a swift file. something like: user.swift: class user { var name: string

I allow comments on different types of items in my app such as books and songs. to link the comment to the item, i create a relationship in core

I have an entity word with keyword is a uniqueconstraint of type string. now i have to import large amount (>100000 records) of words with new

So i'm building my first "real" application with core data and i have a question whether i am thinking the right way or not. here's my

I am using frc and i want to create sections that groups data according to date (dd mmmm)! each task has a date and i am using that date and

I have used transformable properties of core data before but not with c objects like cmtime. i need to store a

I have a variable declared as such: private var thetext = string() private var aid = string() i then do a fetch

I have an array of type [user] and i want to save it in core data and later display it in a table view. here are my functions for saving and

I have surfed the internet a lot. but didn't get any satisfactory answer. my questions is i'm using core data with persistent container

My uitableview with custom reusable cells is done but two issues remain: i can create 6 cells but when i add the 7th

I have the following base nsmanagedobject in our application: @objc(laravelentity) class laravelentity: nsmanagedobject {

I would like to trigger func updatecellvaluelabel(...) from viewwillappear so my data is up to date

I'm working on a recipe app that will have a shopping list feature and i'd like to know if approach is not wrong. recipe (one to

I am still struggling with coredata to start the week haha. i finally succeeded in saving and fetching my array, now is time to edit

Sorry if the question might be a dublicate but i didn't find anything relevant to my specific issue. so, i get data from an oline db and want to

I am currently working on an iphone app which utilizes cloudkit for syncing the app data between the users devices. i use

I've been fighting with this error for an hour now, i can't see what's wrong here...

Overview i have an nsfetchedresultscontroller the user would be able to add new records (table view in

I have to create and remove attributes based on an api response in objective c. for example, now my api response contains fields

I have a problem with ios core data and many to many relations. i want to write a fitness application. so i need three tables. following

Deriveddata keeps returning into my project no matter how many different ways i try to delete it. this is causing a compile error. i

I followed a tutorial on how to parse from a json file and preload a sqlite database according to this:

I am using child nsmanagedobjectcontexts in my ios app as a scratchpad. i am using an extension of

I had my app working with core data, then cloudkit to sync between devices and now i'd like to share data between users. i watched both

The values of my coredata entity order is stored in orderdetails. orderdetails has a count of 8 and it has

I have a json i am fetching from a remote server that contains a list of countries (and id, the country name, and the country abbreviation). i am

When designing coredata, we have to explicitly specific the bit of the used integer integer 16 integer 32 integer

I have a fully developed app using core data. now that it is complete, i want to add cloudkit synchronization (like i have done with other apps).

I am a beginner and never worked close with coredata. i have a json response, which results need to be shown in a table view. i want implement a

I'm trying to populate a uitextfield with data from a selected cell. when the table is populated, i use the array var

If i add a new model version and then add an attribute to an entity i get a migration failure. it doesn't matter what the type of the attribute is

I'm trying to delete a list item with context menu. the data is fetched from core data. .ondelete works as expected with my deleteexercise

I have the following data strucutre:

My problem is that i can easily add and delete data but when i am trying to update data in tableview did select method, when i update the last row

I have 2 coredata arrays. one has 3 elements and the other one also has 3 elements. now i want to load in my tableview both these arrays. so i'll

I wanted to update one record in my core data entity and i write code for it but the data is not updated . there is entity posts and it

When updating an entity in coredata, is it necessary to use setvalue(_:forkey:), or can you just set the value using the default

I am reading data with following code from coredata but instead of that can we read first attribute names "firstname",

Hello i'am creating an app for storing college data and student data, crud operation is working perfectly with relation in coredata, i am facing

An update is requested, since this question has of course been answered for previous versions, the latest search result dated 12/16 generates

Adding attribute to entity which don't exist in xcdatamodel was easily accomplised via @synthesize and @dynamic in objective c. please guide how

I added nsmergepolicytype for my context but every time that i have a conflict the app is crash. i added constraints to the table in

Overview: i have an ios app that uses coredata there is an entity called

I'm saving items to favourites and retrieving them in a tableview. however right now a user can add duplicates of these items. i'm trying to avoid

Suppose i have a database table like this: | id | gender| |------|-------| | 0001 | male | | 0002 | male | | 0003 |

I want to write class for manage all entity that i have in my application. there is my code fore managerclass for one custom entity, but i have a

For syncing between objects in core data on an iphone and server backend, i upload fresh objects to the server, grab a server id and then save the

For our ios programming class we must make a framework for swift ios. we had the idea of a framework simplifying coredata manipulation. i began by

I am new to ios developement and core data. in my application i want to use nssortdescriptor to sort data before fetching it to my

I am trying to make a copy of current core data database file. after doing some research, i found that

My data model is using inheritance with core data, and i can think of 3 strategies to store this data into cloudkit records. in the model

In my current model version i have this 4 entities : satellite (with relationship to one to satelliteanimation)

I have a dozen table view controllers that all work as expected, then i have this one which crashes with: terminating app due to uncaught

I do a lot of apps (two tier apps) with sql server, and this is my first app in ios with core data. i am trying to figure out how to do

I know that there is much question about this problem on so, but none of them was helpful for me. i want to set array of students to each

I have created a nsmanagedobject sreminderdate: date(). this is stored in the coredata. the value for this comes from the date and time set by the

When setting codegen on entities(tag, note, category) in data model on category/extension and module 'current product module'

I'm fairly new to coredata, and i'm trying to make a game. i have a couple of questions i was hoping you guys could help me out with some

I have an nspredicate that uses the logical or operator, like this: nspredicate(format: "activefrom == null or %@

I have implemented core database in my application and fetching data from table. application requirement is fetch same data if data

Some context: i will try to explain my situation as clear as i can so that you will have a better understanding of my

I was learning how to work with multiple managed object contexts, and in the midst of the drill let childcontext =

When i was learning how to use child contexts : let childcontext = nsmanagedobjectcontext( concurrencytype:

I am creating coredatastack with pre importing .sqlite database file into my project. func seedcoredatacontaineriffirstlaunch() {

I have 2 entities one customers and other is cases, the relationship is one to many one customer had many cases and the relation names tocustomers

I want to update a specific record in coredata in appdelegate class. but not getting success. in other custom classes it works perfect but i think

I have a question of this data model. entitya entity have a one to one relationship with entityb entity. now i

In core data inside person entity i have an attribute phonenumber whose type i have set to integer 64 bit. in viewcontroller.m, file

Here is my issue, i am using core data to store around 58 documents. all they have is 4 nsstring attributes. i have a helper class that is set up

I am trying to have two sections in my tableview. i would like items to add to section 0 and then be able to select a row to move it from section

In my application i use core data to keep some basic information about user and to easily get data i created an assistant class which