Using GameKit to transfer CoreData data between iPhones, via NSDictionary

Posted by OscarTheGrouch on Stack Overflow See other posts from Stack Overflow or by OscarTheGrouch
Published on 2010-06-17T03:56:24Z Indexed on 2010/06/17 4:03 UTC
Read the original article Hit count: 483

Filed under:

core-data

|

nsdictionary

|

data-transfer

|

transfer

|

gamekit

I have an application where I would like to exchange information, managed via Core Data, between two iPhones.

First turning the Core Data object to an NSDictionary (something very simple that gets turned into NSData to be transferred).

My CoreData has 3 string attributes, 2 image attributes that are transformables.

I have looked through the NSDictionary API but have not had any luck with it, creating or adding the CoreData information to it.

Any help or sample code regarding this would be greatly appreciated.

© Stack Overflow or respective owner

Related posts about core-data

Records not being saved to core data sqlite file

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm a complete newbie when it comes to iOS programming and much less Core Data. It's rather non-intuitive for me, as I really came into my own with programming with MATLAB, which I guess is more of a 'scripting' language. At any rate, my problem is that I had no idea what I had to do to create a… >>> More
iPhone - Core Data crash on migration

as seen on Stack Overflow - Search for 'Stack Overflow'
I have problems, when i install app from Xcode all works but if I build app and install it from iTunes I have an error with the database at launch. This happens only than i have changes in the core data model and need to migrate to a new version. At first launch at crashes with message: Thread 0: 0… >>> More
CoreData update problems

as seen on Stack Overflow - Search for 'Stack Overflow'
My app makes updates in background thread then saves context changes. And in main context there is a table view that works with NSFetchedResultsController. For some time updates work correctly, but then exception is thrown. To check this I've added NSLog(@"%@", [self.controller fetchedObjects]); to… >>> More
Core Data managed object context thread synchronisation

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm have an issue where i'm updating a many-to-many relationship in a background thread, which works fine in that threa, but when I send the object back to the main thread the changes do not show. If I close the app and reopen the data is saved fine and the changes show on the main thread. Also using… >>> More
UITableView Core Data reordering

as seen on Stack Overflow - Search for 'Stack Overflow'
I know this question has been asked before, and I took a look at the answer to this question. However, I'm still confused as to how to implement reordering with a UITableView in a Core Data project. What I know is that I need to have a "displayOrder" attribute in my Entity to track the order of items… >>> More

Related posts about nsdictionary

writing NSDictionary to plist

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I'm trying to write an NSDictionary to a plist but when I open the plist no data has been written to it. From the log my path looks correct and my code is pretty standard. Any ideas? NSArray *keys = [NSArray arrayWithObjects:@"key1", @"key2", @"key3", nil]; NSArray *objects = [NSArray arrayWithObjects:@"value1"… >>> More
iPhone SDK: NSUserDefaults or NSDictionary?

as seen on Stack Overflow - Search for 'Stack Overflow'
Compare the following: using NSUserDefaults saving it with synchronize using NSDictionary saving it with writeToFile in the app Documents folder What are the differences? Personally, I prefer to mantain different NSDictionary organized by topic rather than use a single NSUserDefaults. Am I thinking… >>> More
UIPickerView with NSDictionary

as seen on Stack Overflow - Search for 'Stack Overflow'
I am a .NET programmer and new to Objective C. I am trying to make a UIPickerView which acts like a .NET dropdownlist. User sees the list of text and selects one and the selected value (which is the ID) is used in code. I have been browsing for almost half a day trying to figure this out. I could… >>> More
Remove duplicates in NSdictionary

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there a way to remove duplicate (key-value) pairs from NSDictionary ? EDIT: My description was misleading, I have duplicate pairs e.g. key1-value1 key1-value1 key2-value2 key1-value1 etc.. >>> More
Why 'initWithObjectsAndKeys:' doesn't throw a casting warning? (NSDictionary)

as seen on Stack Overflow - Search for 'Stack Overflow'
Sorry if the question isn't correct, I'm very new in Objective-C. I understand why this code throw the Warning: "warning: passing argument 1 of 'initWithObjectsAndKeys:' makes pointer from integer without" NSDictionary *dictNames = [[NSDictionary alloc] initWithObjectsAndKeys: 3, @"", 4… >>> More