Instance Method

setTemporaryResourceValue(_:forKey:)

Sets a temporary resource value on the URL object.

Declaration

func setTemporaryResourceValue(_ value: Any?, forKey key: URLResourceKey)

Parameters

value

The value to store.

key

The key where the value should be stored. This key must be unique and must not conflict with any system-defined keys. Reverse-domain-name notation is recommended.

Discussion

Your app can use a temporary resource value to temporarily store a value for an app-defined resource value key in memory without modifying the actual resource that the URL represents. Once set, you can copy the temporary resource value from the URL object just as you would copy system-defined keys—by calling getResourceValue(_:forKey:) or resourceValues(forKeys:).

Your app can remove a temporary resource value from the URL object by calling removeCachedResourceValue(forKey:) or removeAllCachedResourceValues() (to remove all temporary values).

This method is applicable only to URLs for file system resources.