failed to find PDF header: `%PDF' not found

I agree, there seems to be a bug (or change of behaviour) in iOS 8 beta 5 which means that your code does not work anymore (and it was valid. I have the same and it worked fine up to iOS 8 beta 4).

I think there is a problem with type detection because if I do the following, it works:

NSLog(@"About to request PDF document loading...");NSData *pdfData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:urlStr]];[self.webView loadData:pdfData MIMEType:@"application/pdf" textEncodingName:@"utf-8" baseURL:nil];

Now that bit of code should not be used "as is" as it is synchronous.

I feel Nithin's answer was valid but it does not answer the problem specifically seen with iOS 8 beta 5. The main code is the same and will hit the same iOS bug.

This worked for me 👊👍

NSURL *targetURL = [NSURL fileURLWithPath:pdfFilePath]; // <pdfFilePath> if full path of your pdf fileNSData *pdfData = [[NSData alloc] initWithContentsOfURL:targetURL];[self.webview loadData:pdfData MIMEType:@"application/pdf" textEncodingName:@"utf-8" baseURL:nil];

Update on SEP 9 2014: iOS8 GM fixed this issue for apps I'm working with.

Response prior to SEP 9 2014It is reported as a known bug by Apple in iOS8 Beta 5 release notes.https://developer.apple.com/library/prerelease/ios/releasenotes/General/RN-iOSSDK-8.0/https://devforums.apple.com/message/1017919#1017919

We should wait next release and see if it is fixed.