gistfile1.txt

        // There is a bug in WebKit
        // Local files cannot be read unless they are in the tmp/www/ directory!
        
        // Example: read "file.pdf" into WKWebView
        var fileManager = NSFileManager.defaultManager()
        var srcPath = NSBundle.mainBundle().pathForResource("file", ofType: "pdf")
        var tmpPath = NSTemporaryDirectory().stringByAppendingPathComponent("www")
        // TODO: handler errors correctly
        fileManager.createDirectoryAtPath(tmpPath, withIntermediateDirectories: true, attributes: nil, error: nil)
        var dstPath = tmpPath.stringByAppendingPathComponent("file.pdf")
        if !fileManager.fileExistsAtPath(dstPath) {
            // TODO: handle errors correctly
            fileManager.copyItemAtPath(srcPath!, toPath: dstPath, error: nil)
        }
        // End of

        let request = NSURLRequest(URL: NSURL.fileURLWithPath(dstPath)!)
        self.webView.loadRequest(request)