Suggests a cluster line breakpoint based on the width provided.
- iOS 3.2+
- macOS 10.5+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Text
The typesetter that creates the line. This parameter is required and cannot be set to
The starting point for the typographic cluster-break calculations. The break calculations include the character starting at
The requested typographic cluster-break width.
A count of the characters from
start that would cause the cluster break. The value returned can be used to construct a character range for
This cluster break is similar to a character break, except that it does not break apart linguistic clusters. No other contextual analysis is done. This can be used by the caller to implement a different line-breaking scheme, such as hyphenation. A typographic cluster break can also be triggered by a hard-break character in the stream. This function is equivalent to
CTTypesetter with an offset of 0.0.