How to Download Files from Uiwebview and Open Again

How to download files from UIWebView and open again

Use the method - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType in your UiWebView's delegate to determine when it wants to load resource.

When the method get's called, you just need to parse the URL from the parameter (NSURLRequest *)request, and return NO if it's one of your desired type and continue with your logic (UIActionSheet) or return YES if the user just clicked a simple link to a HTML file.

Makes sense?

Edit_: For better understanding a quick code example

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
     if(navigationType == UIWebViewNavigationTypeLinkClicked) {
          NSURL *requestedURL = [request URL];
          // ...Check if the URL points to a file you're looking for...
          // Then load the file
          NSData *fileData = [[NSData alloc] initWithContentsOfURL:requestedURL;
          // Get the path to the App's Documents directory
          NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
          NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
          [fileData writeToFile:[NSString stringWithFormat:@"%@/%@", documentsDirectory, [requestedURL lastPathComponent]] atomically:YES];
     } 
}

Edit2_: I've updated the code sample after our dicussion about your issues in the chat:

- (IBAction)saveFile:(id)sender {
    // Get the URL of the loaded ressource
    NSURL *theRessourcesURL = [[webView request] URL];
    NSString *fileExtension = [theRessourcesURL pathExtension];

    if ([fileExtension isEqualToString:@"png"] || [fileExtension isEqualToString:@"jpg"]) {
        // Get the filename of the loaded ressource form the UIWebView's request URL
        NSString *filename = [theRessourcesURL lastPathComponent];
        NSLog(@"Filename: %@", filename);
        // Get the path to the App's Documents directory
        NSString *docPath = [self documentsDirectoryPath];
        // Combine the filename and the path to the documents dir into the full path
        NSString *pathToDownloadTo = [NSString stringWithFormat:@"%@/%@", docPath, filename];

        // Load the file from the remote server
        NSData *tmp = [NSData dataWithContentsOfURL:theRessourcesURL];
        // Save the loaded data if loaded successfully
        if (tmp != nil) {
            NSError *error = nil;
            // Write the contents of our tmp object into a file
            [tmp writeToFile:pathToDownloadTo options:NSDataWritingAtomic error:&error];
            if (error != nil) {
                NSLog(@"Failed to save the file: %@", [error description]);
            } else {
                // Display an UIAlertView that shows the users we saved the file :)
                UIAlertView *filenameAlert = [[UIAlertView alloc] initWithTitle:@"File saved" message:[NSString stringWithFormat:@"The file %@ has been saved.", filename] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [filenameAlert show];
                [filenameAlert release];
            }
        } else {
            // File could notbe loaded -> handle errors
        }
    } else {
        // File type not supported
    }
}

/**
    Just a small helper function
    that returns the path to our 
    Documents directory
**/
- (NSString *)documentsDirectoryPath {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectoryPath = [paths objectAtIndex:0];
    return documentsDirectoryPath;
}

Downloading a file using web view

SwiftHTTP (https://github.com/daltoniam/swiftHTTP) made it possible to me!

Open downloaded files in iOS app

Try this

NSString* pdfFile = @""; //path of file here

NSURL *url = [NSURL fileURLWithPath:pdfFile];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[webView setScalesPageToFit:YES];
[webView loadRequest:request];

[self.view addSubview:webView];

Downloading files from uiwebview in iphone sdk

You can provide webView:shouldStartLoadWithRequest in your UIWebViewDelegate so that each time the user is about to move to another web page, you have the chance to check what the link looks like:

 - (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {

     if ([[[request URL] scheme] isEqual:@"http"] && 
         [[[request URL] pathExtension]...])
            <your download/save code here>
            return NO;  //-- no need to follow the link
     }
     return YES; //-- otherwise, follow the link
  }

View Downloaded PDF on UIWebView

You code looks ok but the path is not

 let downloadedFilePath = "///var/mobile/Containers/Data/Application/DBC9AFAB-3FD4-4D06-82F5-0577251001A7/Library/Caches/RewardMe-Presentation-at-NVIDIA-Auditorium.pdf"
        let filePathURL = NSURL(fileURLWithPath: downloadedFilePath);
        webView.loadRequest(NSURLRequest(URL: url));

Try this hope it works.

For checking that the file exist Open a new finder and press Command+Shift+G after that copy and paste the file path and press enter
If the file load then the file exist. File path in your case is " ///var/mobile/Containers/Data/Application/DBC9AFAB-3FD4-4D06-82F5-0577251001A7/Library/Caches/RewardMe-Presentation-at-NVIDIA-Auditorium.pdf "

Download PDF via UIWebView

-initWithContentsOfURL: method of NSData does a simple HTTP GET, but you needed to set some Authorization params that's why it fails.

To avoid downloading twice the data, you could use NSURLSession to download it, save it, and use the -loadData:MIMEType:textEncodingName:baseURL: of UIWebView to load it.

NSMutableURLRequest *mutableRequest = //Your Custom request with URL and Headers
[[[NSURLSession sharedSession] dataTaskWithRequest:mutableRequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) 
{
    if (data) 
    { 
        //SaveDataIntoDisk
        dispatch_async(dispatch_get_main_queue(), ^(){ 
            [_webView loadData:data MIMEType:@"application/pdf" textEncodingName:@"UTF-8" baseURL:nil]; 
        }); 
    } 
}] resume];

How can I download files from UIWebView using ASIHTTPRequest?

ASIWebPageRequest is the answer. It's a class included with ASIHTTPRequest that makes it easy to download whole pages, with all their associated dependencies.

You'd probably want to create a custom cache to store your downloaded webpages in, and then load them out of that cache when requested by the user.

IOS - Download file then showing it on UIWebView

[[NSBundle mainBundle] URLForResource:file.nameWithoutExtension withExtension:@"pdf"] will give you file from your xcode project folder.

Use this

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *fileName = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"yourFileName.pdf"];

It will get you a file from Documents folder.

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