是否可以在iphone或ipad上查看数字签名的pdf文件？
[英]Is it possible to view digitally signed pdfs on the iphone or ipad?
问题描述
When I try to view a sample digitally signed pdf in a UIWebView, I get blank pages. 
当我尝试在UIWebView中查看数字签名的pdf示例时，我得到了空白页面。 The number of pages is correct, but they are all blank. 页数是正确的，但它们都是空白的。
Normal pdfs show up correctly. 正常的pdf正确显示。
I am not looking for signing a pdf, just viewing a signed pdf. 我不是在寻找签署pdf，只是查看签名的pdf。
1 个解决方案
解决方案1
1 2011-04-15 07:22:00
Standard digital signatures in PDF have no influence over page content, they do not encrypt the page content or change it in some way. PDF中的标准数字签名对页面内容没有影响，它们不会加密页面内容或以某种方式更改页面内容。 It is possible that the files have other problems that prevent them from being displayed. 文件可能存在阻止其显示的其他问题。 Or they are signed and encrypted with a custom security handler and the viewer cannot decrypt them. 或者使用自定义安全处理程序对它们进行签名和加密，并且查看器无法解密它们。
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