CTFontCollection Reference

Derived from
CFType
Framework
Declared in
CTFontCollection.h

Overview

The CTFontCollection opaque type represents a font collection, that is, a group of font descriptors taken together as a single object.

Font collections provide the capabilities of font enumeration, access to global and custom font collections, and access to the font descriptors comprising the collection.

Functions by Task

Creating Font Collections

Getting Font Descriptors

Getting the Type Identifier

Functions

CTFontCollectionCreateCopyWithFontDescriptors

Returns a copy of the original collection augmented with the given new font descriptors.

CTFontCollectionRef CTFontCollectionCreateCopyWithFontDescriptors (
   CTFontCollectionRef original,
   CFArrayRef descriptors,
   CFDictionaryRef options
);
Parameters
original

The original font collection reference.

descriptors

An array of font descriptors to augment those of the original collection.

options

The options dictionary. For possible values, see “Constants.”

Return Value

A copy of the original font collection augmented by the new font descriptors and options.

Discussion

The new font descriptors are merged with the existing descriptors to create a single set.

Availability
  • Available in iOS 3.2 and later.
Declared In
CTFontCollection.h

CTFontCollectionCreateFromAvailableFonts

Returns a new font collection containing all available fonts.

CTFontCollectionRef CTFontCollectionCreateFromAvailableFonts (
   CFDictionaryRef options
);
Parameters
options

The options dictionary. For possible values, see “Constants.”

Return Value

A new collection containing all fonts available to the current application.

Availability
  • Available in iOS 3.2 and later.
Declared In
CTFontCollection.h

CTFontCollectionCreateMatchingFontDescriptors

Returns an array of font descriptors matching the collection.

CFArrayRef CTFontCollectionCreateMatchingFontDescriptors (
   CTFontCollectionRef collection
);
Parameters
collection

The font collection reference.

Return Value

A retained reference to an array of normalized font descriptors matching the collection definition.

Availability
  • Available in iOS 3.2 and later.
Declared In
CTFontCollection.h

CTFontCollectionCreateMatchingFontDescriptorsSortedWithCallback

Returns the array of matching font descriptors sorted with the callback function.

CFArrayRef CTFontCollectionCreateMatchingFontDescriptorsSortedWithCallback (
   CTFontCollectionRef collection,
   CTFontCollectionSortDescriptorsCallback sortCallback,
   void *refCon
);
Parameters
collection

The collection reference.

sortCallback

The sorting callback function that defines the sort order.

refCon

Pointer to client data define context for the callback.

Return Value

An array of font descriptors matching the criteria of the collection sorted by the results of the sorting callback function.

Availability
  • Available in iOS 3.2 and later.
Declared In
CTFontCollection.h

CTFontCollectionCreateWithFontDescriptors

Returns a new font collection based on the given array of font descriptors.

CTFontCollectionRef CTFontCollectionCreateWithFontDescriptors (
   CFArrayRef descriptors,
   CFDictionaryRef options
);
Parameters
descriptors

An array of font descriptors.

options

The options dictionary. For possible values, see “Constants.”

Return Value

A new font collection based on the provided font descriptors.

Discussion

The contents of the returned collection are defined by matching the provided descriptors against all available font descriptors.

Availability
  • Available in iOS 3.2 and later.
Declared In
CTFontCollection.h

CTFontCollectionGetTypeID

Returns the type identifier for Core Text font collection references.

CFTypeID CTFontCollectionGetTypeID (
   void
);
Return Value

The identifier for the opaque type CTFontCollection.

Availability
  • Available in iOS 3.2 and later.
Declared In
CTFontCollection.h

CTFontCollectionSortDescriptorsCallback

Returns the matching font descriptors of a collection in sorted order.

typedef CFComparisonResult
   (*CTFontCollectionSortDescriptorsCallback)
   (CTFontDescriptorRef first, CTFontDescriptorRef second, void *refCon);
Parameters
CTFontDescriptorRef first

The first descriptor.

CTFontDescriptorRef second

The second descriptor.

refCon

Pointer to client data define context for the callback.

Return Value

The matching font descriptors of a collection in sorted order.

Declared In
CTFontCollection.h

Data Types

CTFontCollectionRef

A reference to a font collection.

typedef const struct __CTFontCollection * CTFontCollectionRef;
Availability
  • Available in iOS 3.2 and later.
Declared In
CTFontCollection.h

CTMutableFontCollectionRef

A reference to a mutable font collection.

typedef struct __CTFontCollection * CTMutableFontCollectionRef;
Discussion

An opaque reference to a mutable font collection.

Availability
  • Available in iOS 4.0 and later.
Declared In
CTFontCollection.h

Constants

kCTFontCollectionRemoveDuplicatesOption

An option key to specify filtering of duplicates.

const CFStringRef kCTFontCollectionRemoveDuplicatesOption;
Constants
kCTFontCollectionRemoveDuplicatesOption

Option key to specify filtering of duplicates.

Available in iOS 3.2 and later.

Declared in CTFontCollection.h.

Discussion

Specify this option key in the options dictionary with a nonzero value to enable automatic filtering of duplicate font descriptors.

Declared In
CTFontCollection.h

CTFontCollectionCopyOptions

Option bits for use with CTFontCollectionCopyFontAttribute(s).

enum  {
   kCTFontCollectionCopyDefaultOptions = 0,
   kCTFontCollectionCopyUnique = (1L << 0),
   kCTFontCollectionCopyStandardSort = (1L << 1)
};
typedef uint32_t CTFontCollectionCopyOptions;
Constants
kCTFontCollectionCopyDefaultOptions

Passing this option indicates that defaults are to be used.

Available in iOS 4.2 and later.

Declared in CTFontCollection.h.

kCTFontCollectionCopyStandardSort

Passing this option indicates that the return values should be sorted in standard UI order, suitable for display to the user. This is the same sorting behavior used by NSFontPanel and Font Book.

Available in iOS 4.2 and later.

Declared in CTFontCollection.h.

kCTFontCollectionCopyUnique

Passing this option indicates that duplicate values should be removed from the results.

Available in iOS 4.2 and later.

Declared in CTFontCollection.h.

Declared In
CTFontCollection.h