如何从PDF.js iframe获取当前的PDF页码? [英] How can I get the current PDF page number from PDF.js iframe?

问题描述

我将查看器托管在本地Web服务器上，并且iframe指向并加载了pdf.

I have the viewer hosted on my local webserver and the iframe points and loads up the pdf.

然后我想按一个将页码记录"到文本文件中的按钮，我读到

I then want to press a button that 'logs' the page number to a text file, I read this question and answer which seems to suggest you can use pdf.getPage to get the page number but how can i access the PDFJS when it is being ran from inside of the iframe?

谢谢.

推荐答案

var iFrame =  document.getElementById('iframe_id');
if ( iFrame.contentDocument ) {
    currentPageNum= iFrame.contentDocument.getElementById('pageNumber').value;
}
alert(currentPageNum);

这将访问iframe，然后在viewer.html中搜索包含页码的元素.现在需要做的就是将currentPageNum传递给表单.

This will access the iframe and then search the viewer.html for the element that contains the page number. All that needs doing now is to pass currentPageNum to the form.

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