---
title: viewDidChangeBackingProperties()
framework: appkit
role: symbol
role_heading: Instance Method
path: appkit/nsview/viewdidchangebackingproperties()
---

# viewDidChangeBackingProperties()

Responds when the view’s backing store properties change.

## Declaration

```swift
func viewDidChangeBackingProperties()
```

## Discussion

Discussion The view gets this message when the backing store scale or color space changes. Provide an implementation if you need to swap assets or make other adjustments when a view’s backing store properties change.

## See Also

### Responding to Appearance Changes

- [viewDidChangeEffectiveAppearance()](appkit/nsview/viewdidchangeeffectiveappearance().md)