2.  Text Kit is a high-level, feature-rich set of
classes that has all the characteristics for
fine typography to handle text
 The developers can add different styles and
formatting to the text, such as columns,
multiple fonts, paragraphs, and pages
 It’s responsible for creating, editing,
displaying, and storing text with less code, as
it’s integrated with all UIKit text-based
controls

3. The developers can make use of the following
classes:
 NSAttributedString
 NSLayoutManager
 NSTextContainer
 NSTextStorage

4.  The UIKit framework adds methods
to NSAttributedString to support the drawing
of styled strings and to compute the size and
metrics of a string prior to drawing
 The NSAttributedString class has been
extended to support new attributes
 Framework/System/Library/Frameworks/UI
Kit.framework

5.  Creating an Attributed String
– initWithData:options:documentAttributes:error:
– initWithFileURL:options:documentAttributes:error:
 Drawing the String
– drawAtPoint:
– drawInRect:
– drawWithRect:options:context:
 Getting Metrics for the String
– size
– boundingRectWithSize:options:context:
 Generating Data
– dataFromRange:documentAttributes:error:
– fileWrapperFromRange:documentAttributes:error:

6.  The NSTextStorage class defines the fundamental
interface for managing text-based content.
 Framework/System/Library/Frameworks/UIKit.f
ramework
 NSTextStorage is a semiconcrete subclass
of NSMutableAttributedString that manages a set
of client NSLayoutManager objects, notifying
them of any changes to its characters or
attributes so that they can relay and redisplay
the text as needed
 NSTextStorage defines the fundamental storage
mechanism of the Text Kit’s extended text-
handling system

7.  Setting the Delegate
delegate property
 Determining the Nature of Changes
editedMask property
changeInLength property
editedRange property
 Handling Text Edited Messages
fixesAttributesLazily property
 Handling Layout Managers
layoutManagers property

8.  Handling Text Edited Messages
– edited:range:changeInLength:
– ensureAttributesAreFixedInRange:
– invalidateAttributesInRange:
– processEditing
 Handling Layout Managers
– addLayoutManager:
– removeLayoutManager:

9.  The NSTextContainer class defines a region where
text is laid out
 Framework/System/Library/Frameworks/UIKit.frame
work
 The NSTextContainer class defines a region in which
text is laid out
 An NSLayoutManager object uses one or
more NSTextContainer objects to determine where to
break lines, lay out portions of text, and so on
 An NSTextContainer object defines rectangular
regions, and you can define exclusion paths inside the
text container's bounding rectangle so that text flows
around the exclusion path as it is laid out
 You can create subclasses that define regions of
nonrectangular shapes, such as circular regions

10.  Laying Out Text
layoutManager property
 Defining the Container Shape
exclusionPaths property
size property
lineBreakMode property
 Synchronizing with the Text View
heightTracksTextView property
widthTracksTextView property
 Constraining Layout
maximumNumberOfLines property
lineFragmentPadding property

11.  Creating a Text Container
– initWithSize:
 Laying Out Text
–
lineFragmentRectForProposedRect:atIndex:w
ritingDirection:remainingRect:

12.  The NSLayoutManager class generates glyphs and lays
out text
 Framework/System/Library/Frameworks/UIKit.frame
work
 An NSLayoutManager object coordinates the layout
and display of characters held in
an NSTextStorage object
 Maps Unicode character codes to glyphs, sets the
glyphs in a series of NSTextContainer objects, and
displays them in a series of text view objects
 coordinates its text view objects, provides services to
those text views to support editing paragraph styles,
and handles the layout and display of text attributes
not inherent in glyphs (such as underline or
strikethrough

13.  Text Storage
textStorage property
 Text Containers
textContainers property
 Delegate
delegate property
 Global Layout Manager Options
allowsNonContiguousLayout property
hasNonContiguousLayout property
hyphenationFactor property
showsControlCharacters property
showsInvisibleCharacters property
usesFontLeading property

14.  Getting Glyphs and Glyph Properties
numberOfGlyphs property
 Getting Layout Information
extraLineFragmentRect property
extraLineFragmentTextContainer property
extraLineFragmentUsedRect property

15.  Text Containers
– addTextContainer:– insertTextContainer:atIndex:
– removeTextContainerAtIndex:
– setTextContainer:forGlyphRange:
– textContainerChangedGeometry:
textContainerForGlyphAtIndex:effectiveRange:
– usedRectForTextContainer:
 Invalidation of Layout and Glyphs
– invalidateDisplayForCharacterRange:
– invalidateDisplayForGlyphRange:
–
invalidateGlyphsForCharacterRange:changeInLength:actualChara
cterRange:
– invalidateLayoutForCharacterRange:actualCharacterRange:
–
processEditingForTextStorage:edited:range:changeInLength:inval
idatedRange:

16.  Causing Glyph Generation and Layout
– ensureGlyphsForCharacterRange:
– ensureGlyphsForGlyphRange:
ensureLayoutForBoundingRect:inTextContainer:
– ensureLayoutForCharacterRange:
– ensureLayoutForGlyphRange:
– ensureLayoutForTextContainer:
 Setting Glyphs and Glyph Properties
setGlyphs:properties:characterIndexes:font:forGly
phRange:

17.  Getting Glyphs and Glyph Properties
– characterIndexForGlyphAtIndex:
– getGlyphsInRange:glyphs:properties:characterIndexes:bidiLevels:
– glyphAtIndex:
– glyphAtIndex:isValidIndex:
– glyphIndexForCharacterAtIndex:
– isValidGlyphIndex:
– propertyForGlyphAtIndex:
 Setting Layout Information
– setAttachmentSize:forGlyphRange:
– setDrawsOutsideLineFragment:forGlyphAtIndex:
– setExtraLineFragmentRect:usedRect:textContainer:
– setLineFragmentRect:forGlyphRange:usedRect:
– setLocation:forStartOfGlyphRange:
– setNotShownAttribute:forGlyphAtIndex:

18.  Getting Layout Information
– attachmentSizeForGlyphAtIndex:
– drawsOutsideLineFragmentForGlyphAtIndex:
– firstUnlaidCharacterIndex
– firstUnlaidGlyphIndex
– getFirstUnlaidCharacterIndex:glyphIndex:
– lineFragmentRectForGlyphAtIndex:effectiveRange:
–
lineFragmentUsedRectForGlyphAtIndex:effectiveRan
ge:
– locationForGlyphAtIndex:
– notShownAttributeForGlyphAtIndex:
– truncatedGlyphRangeInLineFragmentForGlyphAtIndex:

19.  Advanced Layout Queries
– boundingRectForGlyphRange:inTextContainer:
– characterIndexForPoint:inTextContainer:fractionOfDistanceBetweenInsertionPoints:
– characterRangeForGlyphRange:actualGlyphRange:
–
enumerateEnclosingRectsForGlyphRange:withinSelectedGlyphRange:inTextContainer
:usingBlock:
– enumerateLineFragmentsForGlyphRange:usingBlock:
– fractionOfDistanceThroughGlyphForPoint:inTextContainer:
–
getLineFragmentInsertionPointsForCharacterAtIndex:alternatePositions:inDisplayOr
der:positions:characterIndexes:
– glyphIndexForPoint:inTextContainer:
– glyphIndexForPoint:inTextContainer:fractionOfDistanceThroughGlyph:
– glyphRangeForBoundingRect:inTextContainer:
– glyphRangeForBoundingRectWithoutAdditionalLayout:inTextContainer:
– glyphRangeForCharacterRange:actualCharacterRange:
– glyphRangeForTextContainer:
– rangeOfNominallySpacedGlyphsContainingIndex:

20.  Supporting Drawing
– drawBackgroundForGlyphRange:atPoint:
– drawGlyphsForGlyphRange:atPoint:
–
drawStrikethroughForGlyphRange:strikethroughType:baselineOffs
et:lineFragmentRect:lineFragmentGlyphRange:containerOrigin:
–
drawUnderlineForGlyphRange:underlineType:baselineOffset:line
FragmentRect:lineFragmentGlyphRange:containerOrigin:
– fillBackgroundRectArray:count:forCharacterRange:color:
– showCGGlyphs:positions:count:font:matrix:attributes:inContext:
–
strikethroughGlyphRange:strikethroughType:lineFragmentRect:li
neFragmentGlyphRange:containerOrigin:
–
underlineGlyphRange:underlineType:lineFragmentRect:lineFragm
entGlyphRange:containerOrigin:

21.  Lesser Build Size due to lesser use of graphics
to display textual images
 Lesser Coding i.e concatenation of two
labels/strings with different layouts is not a
headache now with the release of iOS 7