How can I add support for passkeys to my iOS app?

To add support for passkeys to your iOS app, you can follow these steps:

1. Automatic Passkey Upgrades: Implement automatic passkey upgrades to transition existing accounts from passwords to passkeys seamlessly. This can be done during the sign-in process without interrupting the user flow. The system checks if the account has a passkey and offers to create one if not. This is a progressive enhancement and won't always lead to a passkey being created, but when it does, it provides a smooth user experience.

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2. New Registration API: Use the new registration API to create passkeys automatically for eligible users the next time they sign into your app. This makes future sign-ins faster and more secure. If you've already adopted passkeys, adding automatic passkey registration just requires a single new parameter.

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3. Credential Managers: Credential managers can participate in automatic passkey upgrades and can now fill time-based verification codes, usernames, passwords, or one-time codes into any text field. To add support for these features, update your info plist and matching APIs as described in the authentication services documentation.

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4. Testing and Deployment: Like any feature, shipping passkey support involves learning, building, testing, and deploying. The ultimate goal is to make sign-in easier and improve account security. Ensure that your website's metadata is updated so that the personality of your website comes through in the passwords app.

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For more detailed information, you can watch the session Streamline sign-in with passkey upgrades and credential managers.