Instance Method


Returns a Boolean indicating that the first Uniform Type Identifier (UTI) conforms to the second UTI.


func type(_ firstTypeName: String, conformsToType secondTypeName: String) -> Bool



A string containing the UTI that should conform to secondTypeName.


A string containing a UTI.

Return Value

true if firstTypeName conforms to the UTI hierarchy of secondTypeName; otherwise, false.


Use this method instead of comparing UTIs for equality. See Uniform Type Identifiers Overview for information about UTI conformance.

This method will always return true if the two strings are equal. Use this method with other type names, including those in the CFBundleTypeName keys of your app's Info.plist file.

You can safely call this method from any thread of your app.

See Also

Manipulating Uniform Type Identifier Information

func type(ofFile: String) -> String

Returns the uniform type identifier of the specified file, if it can be determined.

func localizedDescription(forType: String) -> String?

Returns the localized description for the specified Uniform Type Identifier (UTI).

func preferredFilenameExtension(forType: String) -> String?

Returns the preferred filename extension for the specified Uniform Type Identifier (UTI).

func filenameExtension(String, isValidForType: String) -> Bool

Returns whether the specified filename extension is appropriate for the Uniform Type Identifier (UTI).

func urlForApplication(withBundleIdentifier: String) -> URL?

Returns the URL for the app with the specified identifier.