Protocol-oriented, type-safe data source objects that keep your view controllers light
Swift Other
Latest commit e1ec1d3 Jan 20, 2017 @jessesquires committed on GitHub Update


Build Status Version Status license MIT codecov Platform Carthage compatible

Protocol-oriented, type-safe data source objects that keep your view controllers light

A Swift library of data source and delegate objects inspired by Andy Matuschak's type-safe, value-oriented collection view data source gist.


This library reduces the boilerplate code regarding the UITableView, UICollectionView, and NSFetchedResultsController data source objects, as well as the NSFetchedResultsControllerDelegate object. It helps keep view controllers light, while focusing on type-safety, SOLID design principles, and easy interoperability with Cocoa. Further, it brings a more focused and data-driven perspective to these data sources. If you want to change your view then you change your data and its structure, without needing to update any data source or delegate protocol methods.


  • iOS 8+
  • Swift 3.0
  • Xcode 8


CocoaPods (recommended)


# For latest release in cocoapods
pod 'JSQDataSourcesKit'

# Feeling adventurous? Get the latest on develop
pod 'JSQDataSourcesKit', :git => '', :branch => 'develop'


github "jessesquires/JSQDataSourcesKit"


Read the docs. Generated with jazzy. Hosted by GitHub Pages.


$ ./


$ open index.html -a Safari

Getting Started

Watch my talk from Swift Summit. (slides)

import JSQDataSourcesKit


This library has four primary components:

  1. Section — represents a section of data
  2. DataSource — represents a collection of Section types
  3. ReusableViewFactory — responsible for dequeuing and configuring cells (for UITableView or UICollectionView)
  4. DataSourceProvider — owns a data source and cell factory, and provides a UICollectionViewDataSource or UITableViewDataSource object.


The following illustrates a simple example of how these components interact for a collection view.

// Given a view controller with a collection view

// 1. create Sections and a DataSource with your model objects
let section0 = Section(items: ...)
let section1 = Section(items: ...)
let section2 = Section(items: ...)
let dataSource = DataSource(sections: section0, section1, section2)

// 2. create cell factory
let cellFactory = ViewFactory(reuseIdentifier: "CellId") { (cell, model?, type, collectionView, indexPath) -> MyCellClass in
    // configure the cell with the model
    return cell

// 3. create supplementary view factory
let type = ReusableViewType.supplementaryView(kind: UICollectionElementKindSectionHeader)
let headerFactory = ViewFactory(reuseIdentifier: "HeaderId", type: type) { (view, model?, type, collectionView, indexPath) -> MyHeaderView in
    // configure header view
    return view

// 4. create data source provider
let dataSourceProvider =  DataSourceProvider(dataSource: dataSource,
                                             cellFactory: cellFactory,
                                             supplementaryFactory: headerFactory)

// 5. set the collection view's data source
collectionView.dataSource = dataSourceProvider.collectionViewDataSource

Demo Project

The example project included exercises all functionality in this library.


Please follow these sweet contribution guidelines.


Created and maintained by @jesse_squires.


JSQDataSourcesKit is released under an MIT License. See LICENSE for details.

Copyright © 2015-present Jesse Squires.

Please provide attribution, it is greatly appreciated.