Streamline your App Clip

7:53 - Confirm a physical code's location.

import AppClip

guard let payload = userActivity.appClipActivationPayload else {
    return
}

let region = CLCircularRegion(center: CLLocationCoordinate2D(latitude: 37.3298193,        
    longitude: -122.0071671), radius: 100, identifier: "apple_park")

payload.confirmAcquired(in: region) { (inRegion, error) in

}

9:24 - Query if user has granted app clip notification on app clip card.

import UserNotifications

let center = UNUserNotificationCenter.current()

center.getNotificationSettings { (settings) in
   if settings.authorizationStatus == .ephemeral {
        // User has already granted ephemeral notification.
    }

}

10:49 - Embed SKOverlay to your app clip

import SwiftUI
    import StoreKit

    struct ContentView : View {
        @State private var finishedPaymentFlow = false

        var body: some View {
            NavigationView {
                CheckoutView($finishedPaymentFlow)
            }
            .appStoreOverlay(isPresented: $finishedPaymentFlow) {
                SKOverlay.AppClipConfiguration(position: .bottom)
            }
        }
    }

11:32 - Save user ID in app clip's secure app group.

// Automatically log in with Sign in with Apple
import AuthenticationServices

SignInWithAppleButton(.signUp, onRequest: { _ in
}, onCompletion: { result in
    switch result {
    case .success(let authorization):
        guard let secureAppGroupURL = 
            FileManager.default.containerURL(forSecurityApplicationGroupIdentifier:
                "group.com.example.apple-samplecode.fruta")
            else { return };
        guard let credential = authorization.credential as? ASAuthorizationAppleIDCredential 
            else { return }
        save(userID: credential.user, in: secureAppGroupURL)
    case .failure(let error):
        print(error)
   }
})

11:55 - Automatically sign in users to your app if they have signed into your app clip.

import AuthenticationServices

let provider = ASAuthorizationAppleIDProvider()
guard let secureAppGroupURL =
    FileManager.default.containerURL(forSecurityApplicationGroupIdentifier:   
        "group.com.example.apple-samplecode.fruta")
    else { return };
let user = readUserID(in: secureAppGroupURL)
provider.getCredentialState(forUserID: user) { state, error in
    if state == .authorized {
       loadFavoriteSmoothies(userID: user)
   }
}