检查UIWebview是否正在显示PDF

Question

要清楚，我的问题是而不是询问如何在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。这样我可以向用户显示更多选项，例如保存PDF或打印它。检查UIWebView的内容是否为PDF的最佳方法是什么？

Answer 1

您可以检查的MIME类型也稍长的旅程：

@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"]); 
} 

Answer 2

这是一个漫长的旅程，但我认为这会工作...

BOOL isPdf = [[[self.webView.request.URL pathExtension] lowercaseString] 
       isEqualToString:@"pdf"];