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# CTFontManagerRegisterFontURLs(_:_:_:_:)

Registers fonts from the specified font URLs with the font manager.

```
func CTFontManagerRegisterFontURLs(_ fontURLs: CFArray, _ scope: CTFontManagerScope, _ enabled: Bool, _ registrationHandler: ((CFArray, Bool) -> Bool)?)
```

## Parameters

`fontURLs`

A file URL for the fonts or collections (in TTC or OTC format) to register. After registering fonts from a file, don’t move or rename the file.

`scope`

A scope constant that defines the availability and lifetime of the registration. If you specify [`CTFontManagerScope.persistent`](/documentation/CoreText/CTFontManagerScope/persistent) when you register fonts on iOS, those fonts aren’t automatically available to other processes. Other processes can call [`CTFontManagerRequestFonts(_:_:)`](/documentation/CoreText/CTFontManagerRequestFonts(_:_:)) to get access to those fonts. See [`CTFontManagerScope`](/documentation/CoreText/CTFontManagerScope) for more details.

`enabled`

A Boolean value that indicates whether the font derived from the URL should be enabled for font descriptor matching and discoverable through [`CTFontManagerRequestFonts(_:_:)`](/documentation/CoreText/CTFontManagerRequestFonts(_:_:)).

`registrationHandler`

A block called as errors arise or upon completion.

    The block’s     `errors`     parameter contains an array of     <doc://com.apple.documentation/documentation/CoreFoundation/CFError>     references; an empty array indicates no errors. Each error reference contains a     <doc://com.apple.documentation/documentation/CoreFoundation/CFArray>     of font descriptors corresponding to [`kCTFontManagerErrorFontURLsKey`](/documentation/CoreText/kCTFontManagerErrorFontURLsKey)    . These URLs represent the font files causing the error and failing to register successfully.

    This block may be called multiple times during the registration process. The     `done`     parameter becomes     <doc://com.apple.documentation/documentation/Swift/true>     when the registration process completes. Return     <doc://com.apple.documentation/documentation/Swift/false>     from the block to stop the registration operation, like after receiving an error.

## Discussion

Registered fonts are discoverable through font descriptor matching in the calling process.

---

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