How do I get the last HTTP Status Code from a UIWebView?

Question

I would like to detect when a page load request give to a UIWebView has returned a status code in the 5xx or 4xx range.

I\'ve setup the delegate for the web view a

Answer 1

Here is a nice example where they use a combination of creating a NSURLConnection for the first loading, and the UIWebView for the next pages:

http://www.ardalahmet.com/2011/08/18/how-to-detect-and-handle-http-status-codes-in-uiwebviews/

Basically this is the main trick, using the YES/NO return value of shouldStartLoadRequest:

- (BOOL) webView:(UIWebView *)webView 
     shouldStartLoadWithRequest:(NSURLRequest *)request 
                 navigationType:(UIWebViewNavigationType)navigationType
{
    if (_sessionChecked) {
        // session already checked.
        return YES;
    }

    // will check session.

    NSURLConnection *conn = [NSURLConnection connectionWithRequest:request delegate:self];
    if (conn == nil) {
        NSLog(@"cannot create connection");
    }
    return NO;
}

This should get you going without using synchronous requests, especially combined with Jeff's answer.