Question

Hi everybody i’m stuck with trying to convert my UIWebView, in which i’m currently displaying a ppt file, to a bitmap image.

I have this code:

UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 768, 708)];

NSString *path = [[NSBundle mainBundle] pathForResource:documentName ofType:nil];
NSURL *targetURL = [NSURL fileURLWithPath:path];
NSURLRequest *request = [NSURLRequest requestWithURL:targetURL];
[webView loadRequest:request];

NSLog(@"Ouverture du contexte image");
UIGraphicsBeginImageContext(webView.bounds.size);
[webView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

The webview is actually well displayed but I didn’t manage to create it’s render to an image,
If anybody knows where is the issue 😉
Thankss

Answer 1

There’s nothing wrong with your screenshot-taking code — you’re just using it prematurely.

[webView loadRequest:request]; initiates an asynchronous client request. That means you’re taking a screenshot of webView before it even loads its contents.

Move your screenshot-taking code to UIWebViewDelegate‘s method webViewDidFinishLoad:. Of course you’re going to have to assign a delegate to your webView to achieve this.