iPhone SDK: Check validity of URLs with NSURL not working?

Question

I\'m trying to check if a given URL is valid and i\'m doing it like this:

- (BOOL)urlIsValid:(NSString *)address {
    NSURL *testURL = [NSURL URLWithString:         


        

Answer 1

check this method works fine for me

- (BOOL) validateUrl: (NSString *) candidate {
NSString *urlRegEx =
@"(http|https)://((\\w)*|([0-9]*)|([-|_])*)+([\\.|/]((\\w)*|([0-9]*)|([-|_])*))+";
NSPredicate *urlTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", urlRegEx];
return [urlTest evaluateWithObject:candidate];

}

if (![self validateUrl:strRSSurl]) {
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Invalid url" message:[NSString stringWithFormat:@"\"%@\"",strRSSurl] delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
        [alert show ];
        [alert setTag:7];
    }
    else
    {
      valid url
    }