didFailLoadWithError is called with UIWebView even though page later loads

Question

I have a UIViewController which is a UIWebViewDelegate and has a UIWebView inside of it. I am trying to load a particular URL

    NSURL *url = [NSURL URLWithString:urlAddress];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
    [webView loadRequest:requestObj];
    [self.view addSubview:webView];
    [webView release];

But the didFailLoadWithErrordelegate method is almost instantly called, and the error object is:

Did fail load with error: Error Domain=NSURLErrorDomain Code=-999 "The operation couldn’t be completed. (NSURLErrorDomain error -999.)" UserInfo=0x1a66c0 {NSErrorFailingURLKey=www.somewebsite.com, NSErrorFailingURLStringKey=www.somewebsite.com}

However a short time after, you can see that the website loads just fine.

Why is the fail method being called? And how do I know when it has actually failed versus when the method was called regardless of if the website actually failed or not?

I got same error because first time I was use url and second time I load url1. Maybe it will help to anyone. — Mihir Oza, Oct 07 '16 at 05:34

score 38 · Accepted Answer · edited May 23 '17 at 10:31

38

You can get this error when the page is instantly redirected via javascript or somehow else

You can avoid showing the error by answer from here: How do I fix NSURLErrorDomain error -999 in iPhone 3.0 OS

like

if ([error code] != NSURLErrorCancelled) { //show error alert, etc. }

but I don't know how to recognize where it was invoked.

edited May 23 '17 at 10:31

Community

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answered Aug 11 '11 at 15:24

Marek Sebera

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`if ([error code] != NSURLErrorCancelled) { //show error alert, etc. }' URL should be all caps :) – Yas Tabasam Oct 31 '13 at 04:26

score 0 · Answer 2 · edited May 23 '17 at 12:18

0

So according to another StackOverflow question from a while back, the error code you're getting is being caused by a request being made before the previous request has been completed.

What may be happening is you are making multiple calls at the same time / very rapidly, and one is succeeding (so your web page loads) but the other is failing.

edited May 23 '17 at 12:18

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answered Aug 11 '11 at 15:23

lxt

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score -1 · Answer 3 · answered Jun 19 '15 at 07:10

Use TapGesture on the web view using tapcount of 1. Using a function for handling TapGesture, check if the URL returns status code of 200, if so, call the below function

-(void)animateme{
    NSString *urlAddress = Connecting_URL
    NSURL *url = [NSURL URLWithString:urlAddress];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
    [self.webview loadRequest:requestObj];
}

And, using delegate function,

-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{
    UIAlertView  *alert = [[UIAlertView alloc] initWithTitle:@"Device in offline" message:@"Please check your internet connection" delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];
        [alert show];
}

Hope it helps :)

This doesn't answer the question – miniBill May 11 '17 at 10:54 — miniBill, May 11 '17 at 10:54

didFailLoadWithError is called with UIWebView even though page later loads

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