Objective C - 核心文本 在位置查找索引？
我正在尝试获取最接近某个点的字符的索引。
下面的代码工作得很好，因为我的文本对齐方式设置为左，一旦我将其更改为右或居中，它就会给我错误的索引。在获得最接近点的索引时考虑文本对齐的解决方案是什么？
CTLineRef line = (CTLineRef)[lines objectAtIndex:i];
index = CTLineGetStringIndexForPosition(line, point);
编辑：
我的文本对齐是通过添加一个段落样式来完成的，该段落样式的textAlignment设置为kCTCenterTextAlignment
I am trying to get the index of the closest character to a point.
The code below works perfectly fine as ling as my text alignment is set to left, as soon as I chage it to right or center it gives me the wrong index. What would be the solution to consider the text alignment while getting closest index to a point?
CTLineRef line = (CTLineRef)[lines objectAtIndex:i];
index = CTLineGetStringIndexForPosition(line, point);
EDIT:
My text alignment is done by adding a paragraph style that has it's textAlignment setting to kCTCenterTextAlignment
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该点是相对于线的原点（随对齐方式而变化）的，因此您必须使用
CTFrameGetLineOrigins并将线原点的 x 值添加到点的 x 值中。The point is relative to the line's origin (which changes with the alignment), so you have to use
CTFrameGetLineOriginsand add the x value of the line's origin to your point's x value.