Question

- (IBAction)saveButton:(id)sender
{
    NSURL *yourURL = [NSURL URLWithString: webpageURLLabel.text ];
    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:yourURL];
    if ([self checkURL] == YES) {
        [webpagePreview loadRequest:request];
        webpagePreview.scalesPageToFit = YES;
    }
}

- (BOOL)checkURL
{
    NSString *arrayOfStrings = [NSArray arrayWithObjects:@"http://", @"https://", nil];
    NSString *stringToSearchWithin = webpageURLLabel.text;

    BOOL found=NO;
    for (NSString *s in arrayOfStrings)
    {
        if ([stringToSearchWithin rangeOfString:s].location != NSNotFound)
        {
            found = YES;
            break;
        } else
        {
            webpageURLLabel.text = [NSString stringWithFormat:@"http://%@", webpageURLLabel.text];
            found = YES;
            break;
        }
    }
    return found;
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    webpageTitleLabel.text = [webpagePreview stringByEvaluatingJavaScriptFromString:@"document.title"];
}

I debugged it and it looks like it is suppose to load. But for some reason, when you tap the button the first time, nothing happens.

If the user taps the button a second time, it works fine. Any suggestions?

Answer 1

Looks to me like the first time the button is clicked, webpageURLLabel.text may not have a valid URL, and so the request is not valid. Then when [self checkURL] is called, webpageURLLabel.text gets set to a valid URL, and so the next click works.

Maybe you should be calling -checkURL before you create the NSURLRequest?