---
title: MCErrorDomain
framework: multipeerconnectivity
role: symbol
role_heading: Global Variable
path: multipeerconnectivity/mcerrordomain
---

# MCErrorDomain

The NSError domain constant. If the domain value for an NSError object is equal to MCErrorDomain, then the error was produced by the Multipeer Connectivity framework itself, as opposed to a lower-level framework on which it depends.

## Declaration

```swift
let MCErrorDomain: String
```

## See Also

### Constants

- [kMCSessionMaximumNumberOfPeers](multipeerconnectivity/kmcsessionmaximumnumberofpeers.md)
- [kMCSessionMinimumNumberOfPeers](multipeerconnectivity/kmcsessionminimumnumberofpeers.md)