Function

CFStringCreateWithFormatAndArguments(_:_:_:_:)

Creates an immutable string from a formatted string and a variable number of arguments (specified in a parameter of type va_list).

Declaration

func CFStringCreateWithFormatAndArguments(_ alloc: CFAllocator!, _ formatOptions: CFDictionary!, _ format: CFString!, _ arguments: CVaListPointer) -> CFString!

Parameters

alloc

The allocator to use to allocate memory for the new string. Pass NULL or kCFAllocatorDefault to use the current default allocator.

formatOptions

A CFDictionary object containing formatting options for the string (such as the thousand-separator character, which is dependent on locale). Currently, these options are an unimplemented feature.

format

The formatted string with printf-style specifiers. For information on supported specifiers, see String Format Specifiers.

arguments

The variable argument list of values to be inserted into the formatted string contained in format.

Return Value

An immutable string, or NULL if there was a problem creating the object. Ownership follows the The Create Rule.

Discussion

The programming interface for variable argument lists (va_list, va_start, va_end, and so forth) is declared in the standard C header file stdarg.h.

See Also

Creating a CFString

func CFStringCreateArrayBySeparatingStrings(CFAllocator!, CFString!, CFString!) -> CFArray!

Creates an array of CFString objects from a single CFString object.

func CFStringCreateByCombiningStrings(CFAllocator!, CFArray!, CFString!) -> CFString!

Creates a single string from the individual CFString objects that comprise the elements of an array.

func CFStringCreateWithBytes(CFAllocator!, UnsafePointer<UInt8>!, CFIndex, CFStringEncoding, Bool) -> CFString!

Creates a string from a buffer containing characters in a specified encoding.

func CFStringCreateWithBytesNoCopy(CFAllocator!, UnsafePointer<UInt8>!, CFIndex, CFStringEncoding, Bool, CFAllocator!) -> CFString!

Creates a string from a buffer, containing characters in a specified encoding, that might serve as the backing store for the new string.

func CFStringCreateWithCharactersNoCopy(CFAllocator!, UnsafePointer<UniChar>!, CFIndex, CFAllocator!) -> CFString!

Creates a string from a buffer of Unicode characters that might serve as the backing store for the object.

func CFStringCreateWithCStringNoCopy(CFAllocator!, UnsafePointer<Int8>!, CFStringEncoding, CFAllocator!) -> CFString!

Creates a CFString object from an external C string buffer that might serve as the backing store for the object.

func CFStringCreateWithPascalStringNoCopy(CFAllocator!, ConstStr255Param!, CFStringEncoding, CFAllocator!) -> CFString!

Creates a CFString object from an external Pascal string buffer that might serve as the backing store for the object.

func CFStringCreateWithSubstring(CFAllocator!, CFString!, CFRange) -> CFString!

Creates an immutable string from a segment (substring) of an existing string.

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