如何在iOS中检查损坏的PDF？ [英] How to check for a corrupted PDF in iOS?

问题描述

我有一个PDF文件，我从服务器下载，有时用户上传损坏的PDF，我需要检查我的应用程序是否可以打开这样的文件。

I have a PDF file which I downloaded from a server, sometimes the users uploads a corrupted PDF and I need to check if my application can open such a file or not.

那么我可以使用内置方法来检查PDF损坏吗？如果没有，我可以使用免费的轻量级PDF框架来查看或检查损坏？

So is there a built-in way I could use to check for the PDF corruption ? If not is there a free lightweight PDF framework that I could use to view or checking the corruption ?

注意：目前我在UIWebView上打开PDF文件。

推荐答案

我使用CoreGraphics PDF绘图API找到了解决方案。
感谢您此答案。

I've found the solution using the CoreGraphics PDF drawing APIs. Thanks for this answer.

NSString *path = [[NSBundle mainBundle] pathForResource:@"A_Corrupted_PDF" ofType:@"pdf"];
NSData *data = [[NSFileManager defaultManager] contentsAtPath:path];

CGDataProviderRef provider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
CGPDFDocumentRef document = CGPDFDocumentCreateWithProvider(provider);

if (document == nil) {
    NSLog(@"The PDF is corrupted");
}
CGDataProviderRelease(provider);
CGPDFDocumentRelease(document);

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