iOS如何获取PDF页面中的所有单词坐标 [英] iOS How to get all words coordinates in PDF page

问题描述

我浏览了许多教程，通常堆栈用户会向pdfkitten链接，但是在测试时，我对结果不满意.因此，搜索不适用于乘以单词等.

I have looked through many tutorials and usually stack users trow links to the pdfkitten, but as I've tested it I have not satisfied with result. So the search does not work with multiply word and etc.

所以我要寻找的是从pdf页面获取所有单词，并在单词越过某个矩形时突出显示该单词.

So what I am looking for I need to get all words from the pdf page and highlight it if the words cross some rectangle.

推荐答案

我也使用PDFKitten.

I used PDFKitten for the same.

• 我所做的是在扫描PDF时-识别分开的单词 按空格.
• 保存RenderingState(PDFKitten代码中的模型)一词为 遇到的将其保存在当前模型中 RenderingState(PDFKitten代码中的Model)，它将是初始状态. 找到完整的单词(以空格分隔)后，再次保存 当前的RenderingState作为最终状态.
• 使用以下命令将RenderingState转换为实际视图的框架的代码 PDFKitten中提供了高于初始状态和最终状态的信息.你可以 请参阅该代码.
• 将当前媒体盒变换应用到帧.
• 最后不要忘记 将结果框架转换为用户的坐标系.否则 您会看到相反的效果.

• What I did was while scanning the PDF - Identify the words separated by spaces.
• Save the RenderingState(Model in PDFKitten code)word is encountered save that word in a model with it's current RenderingState (Model in PDFKitten code) which will be initial state. When the complete word is found(space separated) again save the current RenderingState as final state.
• The code for converting RenderingState to actual view's frame using above initial state and final state, is present in PDFKitten. You can refer to that code.
• apply current media box transform to frame.
• And finally don't forget to convert resulted frame into user's co-ordinate system. Otherwise you will observe the reverse effect.

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