---
title: errorDomain
framework: uikit
role: symbol
role_heading: Type Property
path: uikit/uiapplication/categorydefaulterror/errordomain
---

# errorDomain

A string that indicates that an error happened when the system attempted to determine if your app is the default in a category.

## Declaration

```swift
static var errorDomain: String { get }
```

## See Also

### Errors when discovering if an app is the default in a category

- [rateLimited](uikit/uiapplication/categorydefaulterror/ratelimited.md)