How can I attached an accessory to the iphone?

To attach an accessory to an iPhone, you can use the new AccessorySetupKit introduced in iOS 18. Here are the steps to follow:

1. Discovery and Authorization:

   • Use the ASAccessorySession to present the accessory picker.
   • Provide an array of ASPickerDisplayItem objects, which define the name, image, and discovery descriptor for the accessory.
   • Call showPicker on the ASAccessorySession to begin the discovery and authorization process.

2. Pairing:

   • The accessory picker will appear with any nearby accessories that your app wants to pair with.
   • With just one tap, the accessory is securely paired with your app, granting both Bluetooth and Wi-Fi access if supported.

3. Event Handling:

   • When the setup finishes, your app will receive an ASAccessoryEvent via the session object.
   • This event contains important information about the newly added accessory for your app to interact with it.

4. Managing Accessories:

   • The ASAccessory class represents a physical accessory and includes properties like authorization state, display name, discovery descriptor, and networking interfaces.
   • You can manage accessories through the new accessory page in Bluetooth and Wi-Fi settings, where users can modify the accessory name, toggle access, or remove it from the system.

For a detailed walkthrough, you can refer to the session Meet AccessorySetupKit (00:01:03).

Relevant Sessions

• Meet AccessorySetupKit
• What’s new in privacy (Accessory Setup Kit picker)