---
title: hevcTemporalSubLayerAccess
framework: coremedia
role: symbol
role_heading: Instance Property
path: coremedia/cmsamplebuffer/sampleattachments-swift.struct/hevctemporalsublayeraccess
---

# hevcTemporalSubLayerAccess

Indicates a temporal sublayer access grouping.

## Declaration

```swift
var hevcTemporalSubLayerAccess: Bool { get set }
```

## Discussion

Discussion Corresponds to ‘tsas’ sample group. This attachment is read from and written to media files as specified in ISO/IEC 14496-15 section 8.4.6 Temporal sub-layer access sample grouping.