I have a Core Data app that works to add or remove one of a Client's many Appointments with buttons bound in IB to my appointments ArrayController. The appointments content is derived from whichever Client is selected in a feed list. I wish to use a SegmentedControl, and as far as I could tell, this requires I programmatically add and r...
Hello all! I am new to iPhone development trying to figure out how to setup a one to many relationship Core Data. I have two Entities setup One Leagues which has a one to many relationship to an entity Teams. So lot's of teams in a league. Think all the teams that play baseball and are in the MLB. I am pre-filling the data when the ...
I'm in the middle of developing a companion iPhone app for an existing web application. To give a brief overview, the iPhone app is a tab bar based application with each tab containing navigation controllers. At the moment the iPhone app is downloading data from the web app in a synchronous mode on the main thread that, of course, ti...
I have one subclass of NSManagedObject like following and stored some instances by NSManagedObjectContext. @interface SomeModelObject : NSManagedObject @property (nonatomic, retain) NSString * text; @end Now, I want to fetch the list sorted by its primary key (created automatically). I've tried NSFetchRequest and got runtime er...
Hi, I am not sure if the leak is in my implementation or is it from apple's side.... Instruments indicate me that I have a leak in this line : if (![[self fetchedResultsController] performFetch:&error]) I am adding annotations by reading the fetchController to the Map.... like this : -(void)fillMapWithAnnotations{ NSError...
Hello, I think I have a problem, maybe linked to a retain cycle in Core-Data. The code is a follow, where self.image is also a NSManagedObject: - (void)setImage:(UIImage*)image1 andThumbnail:(UIImage*)image2 { self.image.data = UIImageJPEGRepresentation(image1, 0.85); // This is autoreleased self.thumbnail = UIImageJPEGRepresen...
Hi folks, I want to create a sidebar in one of my mac applications. Basically it will look much like the Things sidebar. Here is the picture that I basically want to recreate - http://i48.tinypic.com/c25ix.png I can't figure out how to show the "sections" (collect, focus and active projects) and how to have certain items always show u...
I am migrating data from one model version to another in the iPhone, but the migration causes the device to run out of memory and crash. Not to mention it takes forever on the device. I use the default migration settings. I guess the bad guy is one of the tables that contain the order of 105 rows. This table has not changed though, but ...
hello all , I am developing Iphone app that reads data from url and after parsing i should save that data for persistance.(Because of getting app in offline also...). I want to use core data for this. Such that first time only we will read the data from url and save into objct model, so from second time onwards we can fetch the data fro...
Core Data is throwing me for a loop. I have two objects:, Card and CardSet, which are in a many-to-many relationship with each other, i.e. you could have cards 1, 2, and 3 in CardSet A and cards 2, 4, and 5 in CardSet B. I am trying to set up my delete actions so that: If I delete a Card, it is removed from all CardSets to which it be...
Hi, I am building a core data iphone app, and having trouble with retrieving one-many relationship data. Please bear with me while I explain. I have used the data model designer to setup an entity called "Item" that contains many entities called "Comment". I then retrieve multiple entities and display them in a UITableView. I fetch the...
I'm working on a Core Data-based application that has a Mac application acting as a 'server' and an iPhone as a client. Everything is going swimmingly, except I'm running into performance issues. When the user taps an object, the server must return some objects related to that object (nothing too heavy, usually 3-4 objects) and show a U...
I would like to use a Sqlite datbase in an iphone application. The example in the book I am reading has the controllers directly calling into CoreData objects. Coming from MVC/MVP in .NET to me this is akin to opening a SQL Connection in a button event handler. I would typically have a repository that handled the details of retrieving...
Writing my first app with CoreData. The book I'm using to guide me has code like this: // 'Person' is my managed object class Person *newPerson = [NSEntityDescription insertNewObjectForEntityForName:@"Person" inManagedObjectContext:self.managedObjectContext]; [newPerson setValue:nameField.text forKey:@"name"]; The book says that...
Hi, I am using a tableview with data from coredata using nsfetchedresultscontroller. When the view loads i make a new entity using SomeManagedObject *someManagedObject = [NSEntityDescription insertNewObjectForEntityForName:@"SomeManagedObject" inManagedObjectContext:self.managedObjectContext]; This way the new entity appears in my ta...
Using Lightweight Migrations for my Core Data data model. Each update has gone smoothly…in the simulator. On my device, I had not gone through each migration one-by-one. For example, my device had version 3, and I was on version 5. On the simulator, I went from 3 to 4 and then from 4 to 5, but when the device attempted to go from 3 t...
Hi to all of stackoverflow, i'm Italian so, i'm sorry for my bad English... :D i tried to create a simple tableView for listing a few names and a number... all with core data. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { Track *track = [[self fetchedResultsController] objectAtIndexPat...
Is there a way to perform operations during the install phase of an iPhone application? I think this would be the most ideal time to perform tasks such as populating data stores (using core data). Or is there a more convenient way to: pre-populate data perform post-install tasks ...
Hi all, In my application I need to cache the data that's being parsed for which I'm using coredata and inserting it in managedobjectcontext on a thread which is performing the xml parsing function. So this thread is performing two things: parsing and inserting in coredata. I'm using the following function: -(void)saveData { self.man...
I have amount attribute in coredata model with string datatype. I need to find records by comparing amount. I have tried NSPredicate with following but nothing is coming and result is always empty. NSDecimal result; NSScanner *theScanner = [[NSScanner alloc] initWithString:@"10.00"]; [theScanner scanDecimal:&result]; [theScanner release...