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CTFontGetAdvancesForGlyphs 返回一个数组,其中包含每个文本字形(字母)的宽度。
如何获取文本字符串中每个字形(字母)的实际位置?
如果我计算所有文本字形的总和,则结果值大于真实文本字符串。对于某些字母来说,这个问题尤其严重:“To”或“Te”。