摘要： 先说通常意义上的typeset（排字、排版），然后再说NSTypesetter 和 NSATSTypesetter，最后是它们的区别。Typesetting is the composition of text by means of types.这里的type是什么意思呢？In typesetting by hand compositing, a sort or type is a piece of type representing a particular letter or symbol, cast from a matrix mould and assembled with othe 阅读全文

摘要： Apple的Doc对这个类的描述是这样的：The NSTextContainer class defines a region where text is laid out. An NSLayoutManager uses NSTextContainer to determine where to break lines, lay out portions of text, and so on. NSTextContainer defines rectangular regions, but you can create subclasses that define regions of ot 阅读全文