<!--
{
  "availability" : [
    "iOS: 6.0.0 -",
    "iPadOS: 6.0.0 -",
    "macCatalyst: 14.0.0 -",
    "macOS: 13.0.0 -",
    "tvOS: 17.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AVFoundation",
  "identifier" : "/documentation/AVFoundation/AVCaptureMetadataOutputObjectsDelegate",
  "metadataVersion" : "0.1.0",
  "role" : "Protocol",
  "symbol" : {
    "kind" : "Protocol",
    "modules" : [
      "AVFoundation"
    ],
    "preciseIdentifier" : "c:objc(pl)AVCaptureMetadataOutputObjectsDelegate"
  },
  "title" : "AVCaptureMetadataOutputObjectsDelegate"
}
-->

# AVCaptureMetadataOutputObjectsDelegate

Methods for receiving metadata produced by a metadata capture output.

```
protocol AVCaptureMetadataOutputObjectsDelegate : NSObjectProtocol
```

## Overview

The `AVCaptureMetadataOutputObjectsDelegate` protocol must be adopted by the delegate of an [`AVCaptureMetadataOutput`](/documentation/AVFoundation/AVCaptureMetadataOutput) object. The single method in this protocol is optional. The method allows a delegate to respond when a capture metadata output object receives relevant metadata objects through its connection.

The [`AVCaptureMetadataOutput`](/documentation/AVFoundation/AVCaptureMetadataOutput) object calls the methods of the delegate object on the dispatch queue associated with its [`metadataObjectsCallbackQueue`](/documentation/AVFoundation/AVCaptureMetadataOutput/metadataObjectsCallbackQueue) property.

## Topics

### Processing emitted metadata objects

[`metadataOutput(_:didOutput:from:)`](/documentation/AVFoundation/AVCaptureMetadataOutputObjectsDelegate/metadataOutput(_:didOutput:from:))

Informs the delegate that the capture output object emitted new metadata objects.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)