---
title: "init(domain:code:userInfo:)"
framework: foundation
role: symbol
role_heading: Initializer
path: "foundation/nserror/init(domain:code:userinfo:)"
---

# init(domain:code:userInfo:)

Returns an NSError object initialized for a given domain and code with a given userInfo dictionary.

## Declaration

```swift
init(domain: String, code: Int, userInfo dict: [String : Any]? = nil)
```

## Parameters

- `domain`: The error domain—this can be one of the predefined NSError domains, or an arbitrary string describing a custom domain. domain must not be nil. See Error Domains for a list of predefined domains.
- `code`: The error code for the error.
- `dict`: The userInfo dictionary for the error. userInfo may be nil.

## Return Value

Return Value An NSError object initialized for domain with the specified error code and the dictionary of arbitrary data userInfo.

## Discussion

Discussion This is the designated initializer for NSError.