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# AVAssetReader.Status

Values that represent the possible states of an asset reader.

```
enum Status
```

## Overview

You determine an asset reader’s status using its [`status`](/documentation/AVFoundation/AVAssetReader/status-swift.property) property.

## Topics

### Status values

[`AVAssetReader.Status.unknown`](/documentation/AVFoundation/AVAssetReader/Status-swift.enum/unknown)

The asset reader is in an unknown state.

[`AVAssetReader.Status.reading`](/documentation/AVFoundation/AVAssetReader/Status-swift.enum/reading)

The asset reader is successfully reading samples from its asset.

[`AVAssetReader.Status.completed`](/documentation/AVFoundation/AVAssetReader/Status-swift.enum/completed)

The asset reader completes reading all samples within its specified time range.

[`AVAssetReader.Status.failed`](/documentation/AVFoundation/AVAssetReader/Status-swift.enum/failed)

The asset reader can no longer read samples from its asset because of an error.

[`AVAssetReader.Status.cancelled`](/documentation/AVFoundation/AVAssetReader/Status-swift.enum/cancelled)

The asset reader can no longer read samples because you canceled reading.


---

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