---
title: streamIdentifier
framework: network
role: symbol
role_heading: Instance Property
path: network/nwprotocolquic/metadata/streamidentifier
---

# streamIdentifier

The QUIC stream identifier.

## Declaration

```swift
var streamIdentifier: UInt64 { get }
```

## See Also

### Inspecting Stream State

- [usableDatagramFrameSize](network/nwprotocolquic/metadata/usabledatagramframesize.md)