---
title: "notifyPropertiesChanged(_:)"
framework: coremediaio
role: symbol
role_heading: Instance Method
path: "coremediaio/cmioextensiondevice/notifypropertieschanged(_:)"
---

# notifyPropertiesChanged(_:)

Notifies clients of property changes.

## Declaration

```swift
func notifyPropertiesChanged(_ propertyStates: [CMIOExtensionProperty : CMIOExtensionPropertyState<AnyObject>])
```

## Parameters

- `propertyStates`: A dictionary of changed properties.