Core Text - How to know if text is Right to Left

问题

How can we know if the text of a CTRun is right to left? Thanks

回答1:

I do not have practical experience with CTRun, but from the documentation is seems that

 CTRunStatus CTRunGetStatus(CTRunRef run)

returns the information you need, the return value is a bitfield:

enum {
   kCTRunStatusNoStatus = 0,
   kCTRunStatusRightToLeft = (1 << 0),
   kCTRunStatusNonMonotonic = (1 << 1),
   kCTRunStatusHasNonIdentityMatrix = (1 << 2)
};
typedef uint32_t CTRunStatus;

来源：https://stackoverflow.com/questions/18022882/core-text-how-to-know-if-text-is-right-to-left