Build light and fast App Clips

label.text = "Hello"

// TextStyle for label and image
let textStyle = UIFont.TextStyle.largeTitle

// Use the same TextStyle for label and image
label.font = .preferredFont(forTextStyle: textStyle)
let config = UIImage.SymbolConfiguration(textStyle: textStyle)

imageView.image = UIImage(systemName: "pencil.and.outline", withConfiguration: config)

// Align baseline of text and symbol image
imageView.firstBaselineAnchor.constraint(equalTo: label.firstBaselineAnchor).isActive = true

<meta name="apple-itunes-app" content="app-id=myAppStoreID, app-clip-bundle-id=appClipBundleID, app-clip-display=card">

if let activationPayload = userActivity?.appClipActivationPayload {
  activationPayload.confirmAcquired(in: region)
  { inRegion, error in
    if let error = error as? APActivationPayloadError {
      if error.code ==
      APActivationPayloadError.disallowed {
        // User denied permission
        // Or invocation was not from visual code or NFC
      } else if error.code ==
      APActivationPayloadError.doesNotMatch {
        // Activation payload is not the most recent
        // Catch in testing. Handle as above.
      }
    } else if error == nil {
      // Platform was able to determine location
      // OK to check inRegion
    }
  }
}