檢查UIWebview是否正在顯示PDF

Question

要清楚，我的問題是而不是詢問如何在UIWebview中顯示PDF。我想檢查用戶是否從某個網站或鏈接導航到PDF（.pdf）文檔。這樣我可以向用戶顯示更多選項，例如保存PDF或打印它。檢查UIWebView的內容是否爲PDF的最佳方法是什麼？

Answer 1

您可以檢查的MIME類型也稍長的旅程：

@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

這是一個漫長的旅程，但我認爲這會工作...

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