RDSDemo-AppSync.swift

import UIKit
import AWSAppSync // #1

class AWSServicesTableViewController: UITableViewController {

    // Reference AppSync client
    var appSyncClient: AWSAppSyncClient? // #2
    
    // Sample data
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        initializeAppSync() // #3
    }
    
    // #4
    // Use this code when setting up AppSync with API_key auth mode. This mode is used for testing our GraphQL mutations, queries, and subscriptions with an API key.
    func initializeAppSync() {
        do {
            // Initialize the AWS AppSync configuration
            let appSyncConfig = try AWSAppSyncClientConfiguration(appSyncServiceConfig: AWSAppSyncServiceConfig(),
                                                                  cacheConfiguration: AWSAppSyncCacheConfiguration())  
            // Initialize the AWS AppSync client
            appSyncClient = try AWSAppSyncClient(appSyncConfig: appSyncConfig)
        } catch {
            print("Error initializing appsync client. \(error)")
        }
    }
    // End #4
  
  //...
}