Instance Method


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


- (BOOL)type:(NSString *)firstTypeName conformsToType:(NSString *)secondTypeName;



A string containing the UTI that should conform to secondTypeName.


A string containing a UTI.

Return Value

YES if firstTypeName conforms to the UTI hierarchy of secondTypeName; otherwise, NO.


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

This method will always return YES 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

- typeOfFile:error:

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

- localizedDescriptionForType:

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

- preferredFilenameExtensionForType:

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

- filenameExtension:isValidForType:

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

- URLForApplicationWithBundleIdentifier:

Returns the URL for the app with the specified identifier.