---
title: readOnlyPropertyAttribute
framework: coremediaio
role: symbol
role_heading: Type Property
path: coremediaio/cmioextensionpropertyattributes/readonlypropertyattribute
---

# readOnlyPropertyAttribute

A class property for a read-only property attribute.

## Declaration

```swift
class var readOnlyPropertyAttribute: CMIOExtensionPropertyAttributes<AnyObject> { get }
```

## Discussion

Discussion The attribute doesn’t contain values for its minValue, maxValue, or validValues properties.