<!--
{
  "availability" : [
    "iOS: 8.0.0 -",
    "iPadOS: 8.0.0 -",
    "macCatalyst: 8.0.0 -",
    "macOS: 10.10.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 2.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Foundation",
  "identifier" : "/documentation/Foundation/URL/setResourceValues(_:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Foundation"
    ],
    "preciseIdentifier" : "s:10Foundation3URLV17setResourceValuesyyAA011URLResourceE0VKF"
  },
  "title" : "setResourceValues(_:)"
}
-->

# setResourceValues(_:)

Sets the resource value identified by a given resource key.

```
mutating func setResourceValues(_ values: URLResourceValues) throws
```

## Discussion

This method writes the new resource values out to the backing store. Attempts to set a read-only resource property or to set a resource property not supported by the resource are ignored and are not considered errors. This method is currently applicable only to URLs for file system resources.

`URLResourceValues` keeps track of which of its properties have been set. Those values are the ones used by this function to determine which properties to write.

---

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)