---
title: webDomainCategories
framework: managedsettings
role: symbol
role_heading: Instance Property
path: managedsettings/shieldsettings/webdomaincategories-swift.property
---

# webDomainCategories

Categories of websites for the system to cover with a shielding view.

## Declaration

```swift
var webDomainCategories: ShieldSettings.ActivityCategoryPolicy<WebDomain>? { get set }
```

## Discussion

Discussion When the user visits a website in one of these categories, the system calls your extension that customizes the shield’s appearance. When the user taps on a button the shield displays, the system calls your extension that handles user actions. If your app doesn’t provide a list of website categories to shield, this value is nil. Your app can shield up to 50 category tokens and specify up to 50 web domain tokens exceptions at once.

## See Also

### Blocking categories of apps and websites

- [ShieldSettings.ActivityCategoryPolicy](managedsettings/shieldsettings/activitycategorypolicy.md)
- [applicationCategories](managedsettings/shieldsettings/applicationcategories-swift.property.md)
- [applicationCategories](managedsettings/shieldsettings/applicationcategories-swift.type.property.md)
- [webDomainCategories](managedsettings/shieldsettings/webdomaincategories-swift.type.property.md)