事前構築済みの決済ページを使用して、iOS でデジタル商品の決済を受け付けます

{
  "applinks": {

      "apps": [],
      "details": [
           {
             "appIDs": [ "A28BC3DEF9.com.example.MyApp1",
                         "A28BC3DEF9.com.example.MyApp1-Debug" ],
             "components": [
               {
                  "/": "/checkout_redirect*",
                  "comment": "Matches any URL whose path starts with /checkout_redirect"
               }
             ]
           }
       ]
   }
}

curl -I https://example.com/.well-known/apple-app-site-association

import Foundation
import SwiftUI
import StoreKit

struct BuyCoinsView: View {
    @EnvironmentObject var myBackend: MyServer
    @State var paymentComplete = false

    var body: some View {
        // Check if payments are blocked by Parental Controls on this device.
        if !SKPaymentQueue.canMakePayments() {
            Text("Payments are disabled on this device.")
        } else {
            if paymentComplete {
                Text("Payment complete!")
            } else {
                Button {
                    myBackend.createCheckoutSession { url in
                        UIApplication.shared.open(url, options: [:], completionHandler: nil)
                    }
                } label: {
                    Text("Buy 100 coins")
                }.onOpenURL { url in
                    // Handle the universal link from Checkout.
                    if url.absoluteString.contains("success") {
                        // The payment was completed. Show a success
                        // page and fetch the latest customer entitlements
                        // from your server.
                        paymentComplete = true
                    }
                }
            }
        }
    }
}

class MyServer: ObservableObject {
  // The cached login token
  var token: String?

  func createCheckoutSession(completion: @escaping (URL) -> Void) {
    // Send the login token to the `/create_checkout_session` endpoint
    let request = URLRequest(url: URL(string: "https://example.com/create-checkout-session?token=\(self.token)")!)

    let task = URLSession.shared.dataTask(with: request, completionHandler: { (data, response, error) in
      guard let unwrappedData = data,
            let json = try? JSONSerialization.jsonObject(with: unwrappedData, options: []) as? [String : Any],
            let urlString = json["url"] as? String,
            let url = URL(string: urlString) else {
        // Handle error
        return
      }

      DispatchQueue.main.async {
        // Call the completion block with the Checkout session URL returned from the backend
        completion(url)
      }
    })
    task.resume()
  }

  func login() {
    // Login using the server and set the login token.
    let request = URLRequest(url: URL(string: "https://example.com/login")!)

    let task = URLSession.shared.dataTask(with: request, completionHandler: { (data, response, error) in
      guard let unwrappedData = data,
            let json = try? JSONSerialization.jsonObject(with: unwrappedData, options: []) as? [String : Any],
            let token = json["token"] as? String else {
        // Handle error
        return
      }
      self.token = token
    })
    task.resume()
  }
}