---
title: AVMetricEvent
framework: avfoundation
role: symbol
role_heading: Class
path: avfoundation/avmetricevent
---

# AVMetricEvent

A base class that represents a metric event.

## Declaration

```swift
class AVMetricEvent
```

## Topics

### Inspecting an event

- [date](avfoundation/avmetricevent/date.md)
- [mediaTime](avfoundation/avmetricevent/mediatime.md)
- [sessionID](avfoundation/avmetricevent/sessionid.md)

### Initializers

- [init(coder:)](avfoundation/avmetricevent/init(coder:).md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Inherited By

- [AVMetricContentKeyRequestEvent](avfoundation/avmetriccontentkeyrequestevent.md)
- [AVMetricDownloadSummaryEvent](avfoundation/avmetricdownloadsummaryevent.md)
- [AVMetricErrorEvent](avfoundation/avmetricerrorevent.md)
- [AVMetricHLSMediaSegmentRequestEvent](avfoundation/avmetrichlsmediasegmentrequestevent.md)
- [AVMetricHLSPlaylistRequestEvent](avfoundation/avmetrichlsplaylistrequestevent.md)
- [AVMetricMediaResourceRequestEvent](avfoundation/avmetricmediaresourcerequestevent.md)
- [AVMetricPlaybackModeSwitchEvent](avfoundation/avmetricplaybackmodeswitchevent.md)
- [AVMetricPlayerItemLikelyToKeepUpEvent](avfoundation/avmetricplayeritemlikelytokeepupevent.md)
- [AVMetricPlayerItemPlaybackSummaryEvent](avfoundation/avmetricplayeritemplaybacksummaryevent.md)
- [AVMetricPlayerItemRateChangeEvent](avfoundation/avmetricplayeritemratechangeevent.md)
- [AVMetricPlayerItemVariantSwitchEvent](avfoundation/avmetricplayeritemvariantswitchevent.md)
- [AVMetricPlayerItemVariantSwitchStartEvent](avfoundation/avmetricplayeritemvariantswitchstartevent.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Metrics

- [AVMetrics](avfoundation/avmetrics.md)
- [AVMergedMetrics](avfoundation/avmergedmetrics.md)
- [AVVideoPerformanceMetrics](avfoundation/avvideoperformancemetrics.md)
- [AVMetricEventStreamPublisher](avfoundation/avmetriceventstreampublisher.md)
- [AVMetricErrorEvent](avfoundation/avmetricerrorevent.md)
- [Metric event types](avfoundation/metric-event-types.md)