Local Data Persistence - Using Realm

Overview

The RealmSwift library allows you to easily persist your data model.

Project Setup - CocoaPods

• Navigate to your project directory in Terminal
• Make sure you have the latest version of Realm

pod repo update 

• Create a Podfile

pod init

• Open your Podfile in a text editor

open Podfile

• Add the RealmSwift dependency to your Podfile right below # Pods for [Your_App]

pod 'RealmSwift'

• Add the following to the very bottom of your Podfile (Xcode 8)

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['SWIFT_VERSION'] = '3.0'
    end
  end
end

• Save and close the Podfile
• Install the RealmSwift CocoaPod

pod install

• Close your Xcode Project and open up the .xcworkspace file (Once you add Cocoapods, you will always use the .xcworkspace file instead of .xcodeproj)
• Clean cmd + shift + k and build cmd + b your project. This is nessesary to get your project to "see" any pods you have added.

Create a Class

• Import the RealmSwift module anywhere you want access to RealmSwift objects and methods

import RealmSwift
// If you get a "no module 'RealmSwift'" error, erase the import line and clean and build your project.

• Create your class as a subclass of the RealmSwift

Saving Data

Retrieving Data