Core Data (and iCloud) made nimble and fast.

The answer is quite easy. I needed a Core Data wrapper with these features:

• Easy setup and finders (anyone said MagicalRecord?)
• Simple architecture with a main and a background context. A lot has been written about how much faster are 2 context rather than parent+children. Read here and here if you're interested
• iOS 7 and iCloud ready (but still compatible)

CocoaPods makes our lifes easy :)

pod "Nimble"

and then import Nimble.h into your prefix file.

First, set up the local or cloud store based on what you need

[NimbleStore nb_setupStore:&error];
// OR
[NimbleStore nb_setup_iCloudStore:&error]

The iCloud set up, thanks to iOS 7's API is natively completely asynchronous and a local store is created ready to use waiting for the iCloud's one.
At this moment, iCloud is available for iOS 7 only as it is not good enough in iOS 6.

Easily save in main or background thread, everything is then merged into the main context

[NimbleStore nb_saveInBackground:^(NBContextType contextType) {
  Book *book = [Book nb_createInContextOfType:contextType];
  book.name = @"Best book ever";
}];

You can create a new object with

[YourModelObject nb_createInContextOfType:NBMainContext];

to create an object and in the same time initialize some of its property, you can just use

[YourModelObject nb_createInContextOfType:NBMainContext initializingPropertiesWithDictionary:@{
    @"name" : @"Marco" ,
    @"surname" : @"Sero"
}];

You can find all type of finders and fetchers in NSManagedObject+Finders.h

For example, to fetch and change an object in background you can just do:

[NimbleStore nb_saveInBackground:^(NBContextType contextType) {
  Book *book = [Book nb_findFirstInContext:contextType];
  book.name = @"updated name";
}];

It just needs some love from you guys as it has never been tested on a real app. After that, here's my list:

• more tests & documentation
• iCloud sync issues handler
• compile time switch to use everything without the nb_ prefix
• data importers

Marco Sero

• http://www.marcosero.com
• http://twitter.com/marcosero
• [email protected]

Nimble is available under the MIT license. See the file LICENSE.