Correct way to load image into UIWebView from NSData object

Question

I have downloaded a gif image into an NSData object (I've checked the contents of the NSData object and it's definitely populated). Now I want to load that image into my UIWebView. I've tried the following:

[webView loadData:imageData MIMEType:@"image/gif" textEncodingName:nil baseURL:nil];

but I get a blank UIWebView. Loading the image from the same URL directly works fine:

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:imageUrl]];
[imageView loadRequest:request];

Do I need to set the textEncodingName to something, or am I doing something else wrong?

I want to load the image manually so I can report progress to the user, but it's an animated gif, so when it's done I want to show it in a UIWebView.

Edit: Perhaps I need to wrap my image in HTML somehow? Is there a way to do this without having to save it to disk?

Answer 1

I did not really try to load image to UIWebView but a google search gives me. I think your image string must have a good path and looks like a URL

NSString *imagePath = [[NSBundle mainBundle] resourcePath];
imagePath = [imagePath stringByReplacingOccurrencesOfString:@"/" withString:@"//"];
imagePath = [imagePath stringByReplacingOccurrencesOfString:@" " withString:@"%20"];

NSString *HTMLData = @"
<h1>Hello this is a test</h1>
<img src="sample.jpg" alt="" width="100" height="100" />";
[webView loadHTMLString:HTMLData baseURL:[NSURL URLWithString: [NSString stringWithFormat:@"file:/%@//",imagePath]]];

You can see more details here : Loading local files to UIWebView

Answer 2

You may want to try assigning a delegate to the webview and implementing the method:

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error

To see more specifically what error you're getting. If it doesn't get called, implement the method:

- (void)webViewDidFinishLoad:(UIWebView *)webView

as well, just to make sure something is happening, otherwise there might be an issue with UIWebView (assuming you haven't returned NO from webView:shouldStartLoadWithRequest:navigationType:)