gistfile1.m

- (void)mobilizerButtonPressed:(id)sender {
    UIButton *mobilizerButton = (UIButton *)sender;
    NSString *mobilizerURLString = kMobilizerURL;
    
    NSURL *requestURL;
    
    if ([_currentURL.absoluteString hasPrefix:mobilizerURLString]) {
        requestURL = _mobilizedURL;
        [mobilizerButton setSelected:NO];
    } else if (!_currentURL || [_currentURL.absoluteString isEqualToString:@""]) {
        return;
    } else {
        _mobilizedURL = _webView.request.URL;
        NSString *encodedURLString = (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)_currentURL.absoluteString, NULL, CFSTR("!*'();:@&=+$,/?%#[]"), kCFStringEncodingUTF8));
        NSString *mobilizerURL = [NSString stringWithFormat:[mobilizerURLString stringByAppendingString:@"%@"], encodedURLString];
        requestURL = [NSURL URLWithString:mobilizerURL];
        [mobilizerButton setSelected:YES];
        
        [MBProgressHUD showHUDAddedTo:self.webView animated:YES];
    }
    
    [_webView stopLoading];
    
    NSURLRequest *request = [NSURLRequest requestWithURL:requestURL];
    [_webView loadRequest:request];
}