Question

This seems like a strange one. Not even sure if it is possible!!

I have a UIWebView that loads a local html page. On this html page I have a button.

I want to click on the button and then call an IBAction in Xcode.

How would I go about this? Or can you even do this???

Thanks guys,

Stefan.

Answer 1

You can do it by using a custom protocol. In you html file, you can link to something like myProtocol://callSomeAction.

Then on your UIWebViewDelegate (probably your UIViewController) you have to implement the method called:

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

(Docs here)

The idea is that on that code, you detect the protocol based on the data in the request parameter. If it is myProtocol, you can call your IBAction and return NO. If it’s something else, you fallback to have the web view load the page, and just return YES.

The code would look something like this:

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

    NSString* scheme = [[request URL] scheme];
    if ([@"myProtocol" isEqual:scheme]) {
        // Call your method
        return NO;
    } else {
        return YES;
    }
}