Core Data: Beyond the Basics

Jul 26 2022 · Swift 5.5, iOS 15, Xcode 13.3.1

Part 1: Fetching & Displaying Launches

03. Sorting Data Using Sort Descriptors

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Previous episode: 02. Displaying Launches Next episode: 04. Filtering Using Predicates

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In the last video you were able to fetch all the RocketLaunches from the persistent store but you didn’t have a way to sort the incoming data. If you create a new RocketLaunch it’s simply added to the top of the list.

static func sortedFetchRequest() -> FetchRequest<RocketLaunch> {}
let launchDateSortDescriptor = NSSortDescriptor(key: "launchDate", ascending: true)
return FetchRequest(entity: RocketLaunch.entity(), sortDescriptors: [launchDateSortDescriptor])
let launchesFetchRequest = RocketLaunch.sortedFetchRequest()
static func fetchRequestSortedByNameAndLaunchDate() -> FetchRequest<RocketLaunch> {}
let nameSortDescriptor = NSSortDescriptor(key: "name", ascending: true)
let launchDateSortDescriptor = NSSortDescriptor(key: "launchDate", ascending: true)
return FetchRequest(entity: RocketLaunch.entity(), sortDescriptors: [nameSortDescriptor, launchDateSortDescriptor])
var launchesFetchRequest = RocketLaunch.fetchRequestSortedByNameAndLaunchDate() 
A night time launch!
Date: 4/30/22
NavigationLink(destination: LaunchDetailView(launch: launch)) {
	LaunchStatusView(isViewed: launch.isViewed)
	Text("\(launch.name ?? "")")
}