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import UIKit// 👇 Import the SDKimport PrimerSDK
class ViewController: UIViewController {
        // ...
        var availablePaymentMethods: [PrimerHeadlessUniversalCheckout.PaymentMethod]?
    override func viewDidLoad() {        super.viewDidLoad()
                // ...
                // 👇 Start Headless Universal Checkout with your session's client token        PrimerHeadlessUniversalCheckout.current.start(withClientToken: clientToken, delegate: self) { availablePaymentMethods, err in            if let err = err {                // Handle error            } else if let availablePaymentMethods = availablePaymentMethods {                // Payment methods that are available for this session                self.availablePaymentMethods = availablePaymentMethods            }        }    }}
extension ViewController: PrimerHeadlessUniversalCheckoutDelegate {
        // 👇 [Required] This function will return the checkout data once the payment is finished    func primerHeadlessUniversalCheckoutDidCompleteCheckoutWithData(_ data: PrimerCheckoutData) {
    }}

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extension UIViewController: UITableViewDataSource, UITableViewDelegate {
  func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {    return self.paymentMethods.count  }
  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {    let paymentMethod = self.paymentMethods[indexPath.row]    let cell = tableView.dequeueReusableCell(withIdentifier: "MerchantPaymentMethodCell", for: indexPath) as! MerchantPaymentMethodCell    cell.configure(paymentMethodType: paymentMethod)
    // Primer SDK can provide you with Payment Method buttons that follow    // the payment methods UI guidelines.    // Example given for Apple Pay payment method    // https://developer.apple.com/design/human-interface-guidelines/technologies/apple-pay/introduction    // let paymentMethodButton = PrimerHeadlessUniversalCheckout.makeButton(for: paymentMethod)
    return cell  }
  func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {    // The user has selected a payment method  }}

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do {        let paymentMethodAsset = try PrimerHeadlessUniversalCheckout.AssetsManager.getPaymentMethodAsset(for: paymentMethod.paymentMethodType)} catch {        // Handle error}

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import UIKitimport PrimerSDK
class ViewController: UIViewController {
    // ...
    @IBAction func paymentMethodButtonTapped(_ sender: UIButton) {        do {            // 👇 Create the payment method manager            let nativeUIPaymentMethodManager = try PrimerHeadlessUniversalCheckout.NativeUIManager(paymentMethodType: paymentMethod.paymentMethodType)
            // 👇 Show the payment method            try nativeUIPaymentMethodManager.showPaymentMethod(intent: .checkout)
        } catch {            // Handle error        }    }}

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import UIKitimport PrimerSDK
class ViewController: UIViewController {
    // ...
    var rawDataManager: PrimerHeadlessUniversalCheckout.RawDataManager!
    override func viewDidLoad() {        super.viewDidLoad()
        // ...
        do {            // 👇 Optionally, you can also set its delegate to get notified about data and validation changes            self.rawDataManager = try PrimerHeadlessUniversalCheckout.RawDataManager(paymentMethodType: paymentMethod.paymentMethodType)
            // Capture required inputs...
        } catch {            // Handle error        }    }
    @IBAction func payButtonTapped(_ sender: UIButton) {        self.rawDataManager.submit()    }}

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PrimerHeadlessUniversalCheckout.current.start(..., uiDelegate: self, ...)