How do I determine the of a CTLine following a CTLine

Question

I have a CTLine and I can get the typographic bounds, but that does not tell me how much space there will be after this line and before the next.

Do I have to go through the paragraph styles and determine the maximum paragraph spacing after this line through that, or is there a simpler approach to determine the offset one would use with CTTypesetterCreateLineWithOffset?

Answer 1

您可以使用CTFramesetter从属性字符串中获取CTFrame ，然后使用CTFrameGetLineOrigins()拉出垂直间距。

Answer 2

Answer: there is no public CoreText function that calculates this. You have to calculate it yourself unforunately.