---
title: delegateCallbackQueue
framework: AVFoundation
role: symbol
role_heading: Instance Property
platforms: [iOS 26.0+, iPadOS 26.0+, Mac Catalyst 26.0+, macOS 26.0+, tvOS 26.0+]
path: avfoundation/avcapturetimecodegenerator/delegatecallbackqueue
---

# delegateCallbackQueue

The dispatch queue on which delegate callbacks are invoked.

## Declaration

```swift
var delegateCallbackQueue: dispatch_queue_t? { get }
```

## Discussion

Discussion Provides the queue set in setDelegate(_:queue:). If no delegate is assigned, this property is nil.

## See Also

### Handling delegate callbacks

- [delegate](avfoundation/avcapturetimecodegenerator/delegate.md)