核心文字-如何知道文字是否从右到左 [英] Core Text - How to know if text is Right to Left

问题描述

我们如何知道CTRun的文本是从右到左? 谢谢

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

推荐答案

我没有CTRun的实践经验，但是从文档中看来

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

 CTRunStatus CTRunGetStatus(CTRunRef run)

返回您需要的信息，返回值是一个位域:

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;

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