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# registeredTypeIdentifiers(fileOptions:)

Returns an array with a subset of type identifiers for the item provider, according to the specified file options, in the same order they were registered.

```
func registeredTypeIdentifiers(fileOptions: NSItemProviderFileOptions = []) -> [String]
```

## Parameters

`fileOptions`

An array of [`NSItemProviderFileOptions`](/documentation/Foundation/NSItemProviderFileOptions).

## Return Value

An array of type identifier strings.

## Discussion

To access the array of all registered UTIs, pass the value `0` in the `fileOptions` parameter.

---

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