how do I create a widget with configuration for the control center?

To create a widget with configuration for the Control Center, you can follow these steps:

1. Understand Controls: Controls are a new type of widget introduced in iOS 18, built using WidgetKit. They provide quick access to actions from your app and can be added to system spaces like Control Center, the lock screen, and the action button. Controls can be either buttons or toggles (Extend your app’s controls across the system).

2. Build a Basic Control: Start by defining a control in your widget extension. This involves providing the information to display in the control and the action it performs. For example, you can create a productivity timer control that can be placed in Control Center (Extend your app’s controls across the system).

3. Make the Control Configurable: To make the control user-configurable, you need to update your value provider to conform to the AppIntentControlValueProvider protocol. This makes the value dependent on the configuration of an intent. For instance, you can create a timer control that allows users to choose between work and personal timers (Extend your app’s controls across the system).

4. Use App Intents for Configuration: A configurable control is configured using an app intent, similar to a configurable widget. You need to add an AppIntentControlConfiguration and define the intent type to hold the configuration. For example, you can reuse an existing intent by declaring it conforms to ControlConfigurationIntent (Bring your app’s core features to users with App Intents).

5. Refine the Control: Customize the display name and description of your control to make it clear what it does. This helps users understand the control's purpose when adding it from the controls gallery (Extend your app’s controls across the system).

For a detailed walkthrough, you can refer to the session Extend your app’s controls across the system starting at the "Make controls configurable" chapter.