I am trying to intercept a URL change when using a UIWebView. I currently open a URL (http://www.google.com). However, I would like to know when the user has changed the URL by clicking any of the buttons on the Google webpage. I would then like to do something before the new page loads.
I have tried:
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
however, it does not seem to get called when the URL changes. I do not receive any log in my console, and it loads the page even if the bool returned is "NO".
I have also tried:
- (void)webViewDidStartLoad:(UIWebView *)webView
However, that selector doesn't seem to be called either. Would anyone know of a way to detect a URL change and do something before the new site is loaded? My code is below:
@synthesize webView;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad {
NSString *urlAddress = @"http://www.google.com";
//Create a URL object.
NSURL *url = [NSURL URLWithString:urlAddress];
//URL Requst Object
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
//Load the request in the UIWebView.
[webView loadRequest:requestObj];
UIView *tabBar = [self.navigationController.view.superview viewWithTag:100];
tabBar.hidden = YES;
self.navigationController.view.frame = RECT_PERSONETICS_FRAME;
}
- (void)webViewDidFinishLoad {
// Other stuff if necessary...
// Could use hidden instead of enabled if you don't even want
// the button to be visible
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
// Release anything that's not essential, such as cached data
}
- (void)webViewDidStartLoad:(UIWebView *)webView
{
NSLog(@"Webview URL: %@",[[[webView request] URL] absoluteString]);
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSLog(@"New URL is: %@", request);
return NO;
}