App Clips overview in iOS Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an App Clip target in Swift.

iOS Swift

import SwiftUI

@main
struct MyAppClip: [1] {
  var body: some Scene {
    WindowGroup {
      ContentView()
    }
  }
}

Drag options to blanks, or click blank then click option'

AApp

BAppClipApplication

CAppClip

DAppClipMain

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'App' instead of 'AppClip' causes the app to be a full app, not an App Clip.

The entry point for an App Clip uses @main with a struct conforming to AppClip.

2fill in blank

medium

Complete the code to present the App Clip experience when a user scans a QR code.

iOS Swift

func handleQRCode() {
  let url = URL(string: "https://example.com/appclip")!
  UIApplication.shared.[1](url, options: [:], completionHandler: nil)
}

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AstartAppClip

BlaunchAppClip

CopenAppClip

Dopen

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent method like 'openAppClip' causes compile errors.

Use UIApplication.shared.open(_:options:completionHandler:) to open the URL that triggers the App Clip.

3fill in blank

hard

Fix the error in the code that configures the App Clip's invocation URL in the Info.plist.

iOS Swift

"NSUserActivityTypes" = ["[1]"]

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Acom.example.appclip

Bcom.example.appclip.invocation

Ccom.apple.corespotlightitem

Dcom.apple.appclip

Attempts:

3 left

💡 Hint

Common Mistakes

Using system identifiers like 'com.apple.appclip' will not work for your App Clip.

The NSUserActivityTypes array must include the App Clip's bundle identifier to handle invocation URLs.

4fill in blank

hard

Fill both blanks to create an App Clip experience that uses a specific invocation URL and a fallback URL.

iOS Swift

let invocationURL = URL(string: "https://example.com/[1]")!
let fallbackURL = URL(string: "https://example.com/[2]")!

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Alaunch

Bstart

Chome

Dfallback

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same path for both URLs causes confusion in the app launch process.

The invocation URL path is often 'launch' and the fallback URL path is 'fallback' to handle App Clip launch and fallback behavior.

5fill in blank

hard

Fill all three blanks to define an App Clip invocation using NSUserActivity with a URL and a title.

iOS Swift

let activity = NSUserActivity(activityType: "com.example.appclip.invocation")
activity.webpageURL = URL(string: "https://example.com/[1]")
activity.title = "[2]"
activity.isEligibleForPrediction = [3]

Drag options to blanks, or click blank then click option'

Alaunch

BApp Clip Launch

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Setting isEligibleForPrediction to false disables helpful system features.

The webpageURL should point to the invocation path, the title describes the activity, and isEligibleForPrediction should be true to allow system suggestions.