Changes the first character in each word of a string to uppercase (if it is a lowercase alphabetical character).
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The string to be capitalized. If this value is not a CFMutableString object, an assertion is raised.
A locale that specifies a particular language or region. Prior to OS X v10.3, this parameter was an untyped pointer and not used.