检查UIWebview是否显示PDF

Question

要清楚,我的问题不是询问如何在UIWebview中显示PDF.我想检查用户是否从某个网站或链接导航到PDF(.pdf)文档.这样我就可以向用户显示更多选项,例如保存PDF或打印它.检查UIWebView内容是否为PDF的最佳方法是什么？

Answer 1

您也可以检查MIME类型,以获得稍长的旅程:

@property (nonatomic, strong) NSString *mime;

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{
   mime = [response MIMEType];
}

- (BOOL)isDisplayingPDF {
    NSString *extension = [[mime substringFromIndex:([mime length] - 3)] lowercaseString];

    return ([[[self.webView.request.URL pathExtension] lowercaseString] isEqualToString:@"pdf"] || [extension isEqualToString:@"pdf"]);
}