SwiftFetchedResultsController 5.0.2

SwiftFetchedResultsController 5.0.2

LangLanguage SwiftSwift
License MIT
ReleasedLast Release Dec 2016
SwiftSwift Version 3.0.1
SPMSupports SPM

Maintained by Adam Fish, Ben Chatelain.

Depends on:
RealmSwift>= 2.1.1
RBQFetchedResultsController>= 5.0.2
SafeRealmObject>= 0


Drop-in replacement for NSFetchedResultsController backed by Realm.
Now Supports Realm Swift With A Complete Swift API!

The RBQFetchedResultsController (FRC) is a replacement for NSFetchedResultsController that works with Realm. The controller and delegate follow the same paradigm as NSFetchedResultsController, and allow the developer to monitor changes of a RLMObject subclass.

RBQFetchedResultsController supports tableview sections and implements a drop-in replacement delegate to pass the changes to the tableview for section and row animations.

Realm class requires a primary key to work with RBQFetchedResultsController

The Swift API mirrors Objective-C with the following classes:

  • FetchedResultsController
  • FetchRequest
  • SafeObject


Basic todo list application built with ABFRealmTableViewController which relies on RBQFetchedResultsController:

Todo List Backed By ABFRealmTableViewController

How It Works:

Starting with v4.0 and Realm v0.99, RBQFetchedResultsController works automatically with Realm's fine-grained notification support. It is recommended to use Realm's API directly instead of RBQFetchedResultsController unless you need support for sections.

Changes produced by Realm will be reprocessed to calculate changes accomodating any sections. These changes will then be passed to a delegate:


-(void)controllerWillChangeContent:(RBQFetchedResultsController *)controller;

-(void)controller:(RBQFetchedResultsController *)controller
   didChangeObject:(RBQSafeRealmObject *)anObject
       atIndexPath:(NSIndexPath *)indexPath
      newIndexPath:(NSIndexPath *)newIndexPath;

-(void)controller:(RBQFetchedResultsController *)controller
  didChangeSection:(RBQFetchedResultsSectionInfo *)sectionInfo

-(void)controllerDidChangeContent:(RBQFetchedResultsController *)controller;


func controllerWillChangeContent<T: Object>(controller: FetchedResultsController<T>)

func controllerDidChangeObject<T: Object>(controller: FetchedResultsController<T>, anObject: SafeObject<T>, indexPath: NSIndexPath?, changeType: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?)

func controllerDidChangeSection<T:Object>(controller: FetchedResultsController<T>, section: FetchResultsSectionInfo<T>, sectionIndex: UInt, changeType: NSFetchedResultsChangeType)

func controllerDidChangeContent<T: Object>(controller: FetchedResultsController<T>)


Click Here


Starting with v4.0, RBQFetchedResultsController now only uses the schemas specific to its internal Realm for section caching. This means handling migrations of the cache Realm is no longer necessary!


RBQFetchedResultsController is available through CocoaPods or Carthage.


Build and run/test the Example project in Xcode to see RBQFetchedResultsController in action. This project uses CocoaPods. If you don't have CocoaPods installed, grab it with [sudo] gem install cocoapods.


git clone http://github.com/Roobiq/RBQFetchedResultsController
git submodule init
git submodule update
cd Examples/ObjC
pod install
open RBQFetchedResultsControllerExample.xcworkspace


git clone http://github.com/Roobiq/RBQFetchedResultsController
git submodule init
git submodule update
cd Examples/Swift
pod install
open RBQFRCSwiftExample.xcworkspace

Note: the example projects install the framework by directly including the source files and using Cocoapods to install Realm. There are also example projects that test/demonstrate installation of the framework with Cocoapods and Carthage. For the Cocoapods install example apps (ObjC-cocoapods/Swift-cocoapods) the framework is installed as a development pod, referencing the local podspec and source files. Follow the same instructions as above, since the pod install will simply include the framework.

For the Carthage example apps (ObjC-carthage/Swift-carthage), you must run carthage update after git submodule update in the steps above so that Carthage can build the Realm framework(s) locally. The example project then uses the RBQFetchedResultsController.xcodeproj directly in the same way as you would the resulting framework produced by Carthage.

Current State

The example project includes various functional and unit tests. In addition, the project is used in our Roobiq app and is quite stable.