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Apple 的CGPDFOperatorTable Reference说 PDFOperatorCallback 应该如下所示:

void MyCGPDFOperatorCallback (
   CGPDFScannerRef scanner,
   void *info
);

参数

扫描器

A CGPDFScanner object. Quartz passes the scanner to your callback function. The scanner contains the PDF content stream that has the PDF operator that corresponds to this callback.

信息

A pointer to data passed to the callback.

我很困惑信息将指向什么数据。这是我可以以某种方式设置的东西吗?还是扫描仪自动设置?如果是这样,对什么?

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1 回答 1

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info是您传递给CGPDFScannerCreate函数的参数。

于 2011-08-28T16:33:11.163 回答