用UIWebView显示https的方法

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType;
{
    NSLog(@"Did start loading: %@ auth:%d", [[request URL] absoluteString], _authenticated);
    
    if (!_authenticated) {
        _authenticated = NO;        
        _urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];        
        [_urlConnection start];        
        return NO;
    }    
    return YES;
}

#pragma mark - NSURLConnection Delegate

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge;
{
    NSLog(@"WebController Got auth challange via NSURLConnection");
   
    if ([challenge previousFailureCount] == 0)
    {
        _authenticated = YES;
        NSURLCredential *credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];        
        [challenge.sender useCredential:credential forAuthenticationChallenge:challenge];
    } else {
        [[challenge sender] cancelAuthenticationChallenge:challenge];
    }
}


- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
{
    NSLog(@"WebController received response via NSURLConnection");
   
    // remake a webview call now that authentication has passed ok.    
    _authenticated =YES;
    [self.webView loadRequest:_request];
   
    // Cancel the URL connection otherwise we double up (webview + url connection, same url = no good!)    
    [_urlConnection cancel];    
}

// We use this method is to accept an untrusted site which unfortunately we need to do, as our PVM servers are self signed.

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace
{
    return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}

就是利用NSURLConnection连接去跳过webview本身的加载。