---
title: "addFeedbackHandler(_:)"
framework: metal
role: symbol
role_heading: Instance Method
path: "metal/mtl4commitoptions/addfeedbackhandler(_:)"
---

# addFeedbackHandler(_:)

Registers a commit feedback handler that Metal calls with feedback data when available.

## Declaration

```swift
func addFeedbackHandler(_ block: @escaping MTL4CommitFeedbackHandler)
```

## Parameters

- `block`: doc://com.apple.metal/documentation/Metal/MTL4CommitFeedbackHandler that Metal invokes.