---
title: UIApplicationCategoryDefaultErrorDomain
framework: uikit
role: symbol
role_heading: Global Variable
path: uikit/uiapplicationcategorydefaulterrordomain
---

# UIApplicationCategoryDefaultErrorDomain

A string that identifies errors the system encounters when it determines if your app is the default in a category.

## Declaration

```occ
extern NSErrorDomain const UIApplicationCategoryDefaultErrorDomain;
```

## See Also

### Discovering if your app is the default app in a category

- [defaultStatusForCategory:error:](uikit/uiapplication/defaultstatusforcategory:error:.md)
- [UIApplicationCategoryDefaultStatus](uikit/uiapplicationcategorydefaultstatus.md)
- [UIApplication.Category](uikit/uiapplication/category.md)
- [UIApplicationCategoryDefaultRetryAvailabilityDateErrorKey](uikit/uiapplicationcategorydefaultretryavailabilitydateerrorkey.md)
- [UIApplicationCategoryDefaultStatusLastProvidedDateErrorKey](uikit/uiapplicationcategorydefaultstatuslastprovideddateerrorkey.md)