Quickly obtains a pointer to a Pascal buffer containing the characters of a string in a given encoding.
- iOS 2.0+
- macOS 10.0+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The string to examine.
The string encoding to which the character contents of
theshould be converted.
A pointer to a Pascal string buffer or
NULL if the internal storage of theString does not allow this to be returned efficiently.
This function either returns the requested pointer immediately, with no memory allocations and no copying, in constant time, or returns
NULL. If the latter is returned, call an alternative function such as the
CFString function to extract the characters.
Whether or not this function returns a valid pointer or
NULL depends on many factors, all of which depend on how the string was created and its properties. In addition, the function result might change between different releases and on different platforms. So do not count on receiving a non-
NULL result from this function under any circumstances.