<!--
{
  "availability" : [
    "iOS: 2.0.0 -",
    "iPadOS: 2.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.5.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "QuartzCore",
  "identifier" : "/documentation/QuartzCore/CALayer/needsDisplay()",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Core Animation"
    ],
    "preciseIdentifier" : "c:objc(cs)CALayer(im)needsDisplay"
  },
  "title" : "needsDisplay()"
}
-->

# needsDisplay()

Returns a Boolean indicating whether the layer has been marked as needing an update.

```
func needsDisplay() -> Bool
```

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the layer needs to be updated.

## Discussion

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)