iPhone UIWebView: loadData does not work with certain types (Excel, MSWord, PPT, RTF)

Question

My task is to display the supported document types on an iPhone with OS 3.x, such as .pdf, .rtf, .doc, .ppt, .png, .tiff etc.

Now, I have stored these files

Answer 1

I experienced a very similar issue (i get my files from a server however) and saw your post and thought it was a dead end and then just by chance started to experiment on the device (iPad, in this instance) and it worked when i gave the baseURL as what i used to get it from the server and it worked but does not work on the simulator. I would try that, otherwise I would submit a bug report to Apple.

Answer 2

Here is solution via NSURLProtocol:

class CoreDataFileURLProtocol : NSURLProtocol {
    var connection: NSURLConnection!

    override class func canInitWithRequest(request: NSURLRequest) -> Bool {
        return (request.URL.scheme == "coredatafile")
    }

    override class func canonicalRequestForRequest(request: NSURLRequest) -> NSURLRequest {
        return request
    }

    override func startLoading() {
        if let file_id = self.request.URL.absoluteString?.lastPathComponent {
            if let file = SAFile.MR_findFirstByAttribute("file_id", withValue: file_id) as? SAFile {
                let response = NSURLResponse(URL: request.URL, MIMEType: file.mime, expectedContentLength: Int(file.filesize), textEncodingName: "utf-8")
                client?.URLProtocol(self, didReceiveResponse: response, cacheStoragePolicy: .NotAllowed)
                client?.URLProtocol(self, didLoadData: file.data)
                client?.URLProtocolDidFinishLoading(self)
            }
        }
    }

    override func stopLoading() {
    }
}

Now you need only register class:

NSURLProtocol.registerClass(CoreDataFileURLProtocol.self)

And create a request with file_id:

let url = NSURL(scheme: "coredatafile", host: "myapp.com", path: "/\(file.file_id)")
webView.loadRequest(NSURLRequest(URL: url!))