Question

I am having trouble in calling a method that I defined screenCap by a UIWebView. Basically, I have two UIWebView declared: firstWebView and secondWebView.

I ran a javascript to extract some HTML loaded by the firstWebView and display it to the secondWebView by calling [secondWebView loadHTMLString: extractString baseURL:nil];

What I want to do is after secondWebView is loaded, I want to call
[secondWebView screenCap: self];

The screenCap method is defined by:

-(void) screenCap: (UIWebView *)webView; {

    UIGraphicsBeginImageContext(webView.frame.size);
    [webView.layer renderInContext: UIGraphicsGetCurrentContext()];
    viewImage; = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    theImageView.image = viewImage;
    NSLog(@"write Image done!");

I, however got a warning “UIWebView may not respond to ‘-screenCap’ and of course the screenCap never got called. can anyone direct me how to fix this problem?

Answer 1

There’s nothing wrong in the code of the ScreenCap method.

But instead of doing

[secondWebView screenCap: self];

write

[self screenCap:secondWebView];