swizzlevixen/gist:1889278

## gistfile1.m
//
//  by Mark Boszko
//
//  Expanded from code by DAMIEN LE BERRIGAUD
//  http://meliondesign.blogspot.com/2010/02/mapping-uiwebview-links-to.html
//
//
//  Sample code to return a method call,
//  with or without argument, from UIWebView
//  links with format:
//  selector://selectorString#argument [#argument is optional]
//
//  This would go in your controller/delegate file.
//
//  for instance:
//
//  selector://linkIntercept
// 	will call
//  - linkIntercept
//
//  selector://linkInterceptWithArgument#arg
//  will call
//  - linkInterceptWithArgument:arg
//
//  You might want to change the selector:// scheme to
//  something with random characters, like qa7cf3xr://
//  to avoid overriding another app's registered scheme
//  on the user's device, and provide minimal protection
//  against malicious URLs.
//  In fact, you could generate the random scheme string
//  at runtime, if you really want to go nuts.
//
//  Mike Ash suggested security improvements
//


- (void)viewDidLoad
{
    [super viewDidLoad];

    self.webView.delegate = self;

    NSString *htmlString = @"<!DOCTYPE HTML><html><body><p><a href=\"selector://linkIntercept\">Log me!</a></p><p><a href=\"selector://linkInterceptWithArgument#arg\">Log me with argument!</a></p></body></html>";

    [self.webView loadHTMLString:htmlString baseURL:nil];
}


#pragma mark - Web view delegate method

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    NSLog(@"%@ %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd));

    NSString *scheme, *selectorString, *argumentString = nil;

	// Intercept the link
    if (navigationType == UIWebViewNavigationTypeLinkClicked) {
	       [webView stopLoading];

        // Grab the parts of the URL we need
		// <scheme>://<host>#<fragment>
		scheme = [[request URL] scheme];
        selectorString = [[request URL] host];
        argumentString = [[request URL] fragment];

		// Check for our selector:// scheme, then match it to a method we'll allow (thanks Mike Ash)
		if ([scheme isEqualToString: @"selector"]) {
			if ([selectorString isEqual: @"linkIntercept"]) {
				[self linkIntercept];
			} else if ([selectorString isEqual: @"linkInterceptWithArgument"]) {
				[self linkInterceptWithArgument: argumentString];
			} else {
                NSLog(@"Could not match selector: %@", selectorString);
            }
		}

        return NO;
    }

    //  Let other links be handled by the webview.
    return YES;
}

#pragma mark - methods called from web links

- (void)linkIntercept {
    NSLog(@"%@ %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd));
}

- (void)linkInterceptWithArgument:(NSString *)argument {
	// insert code here to make sure argument is something valid for your method
	// and won't cause a crash or load unwanted data (thanks again Mike Ash)
    NSLog(@"%@ %@ %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), argument);
}
	//
	// by Mark Boszko
	//
	// Expanded from code by DAMIEN LE BERRIGAUD
	// http://meliondesign.blogspot.com/2010/02/mapping-uiwebview-links-to.html
	//
	//
	// Sample code to return a method call,
	// with or without argument, from UIWebView
	// links with format:
	// selector://selectorString#argument [#argument is optional]
	//
	// This would go in your controller/delegate file.
	//
	// for instance:
	//
	// selector://linkIntercept
	// will call
	// - linkIntercept
	//
	// selector://linkInterceptWithArgument#arg
	// will call
	// - linkInterceptWithArgument:arg
	//
	// You might want to change the selector:// scheme to
	// something with random characters, like qa7cf3xr://
	// to avoid overriding another app's registered scheme
	// on the user's device, and provide minimal protection
	// against malicious URLs.
	// In fact, you could generate the random scheme string
	// at runtime, if you really want to go nuts.
	//
	// Mike Ash suggested security improvements
	//


	- (void)viewDidLoad
	{
	[super viewDidLoad];

	self.webView.delegate = self;

	NSString *htmlString = @"<!DOCTYPE HTML><html><body><p><a href=\"selector://linkIntercept\">Log me!</a></p><p><a href=\"selector://linkInterceptWithArgument#arg\">Log me with argument!</a></p></body></html>";

	[self.webView loadHTMLString:htmlString baseURL:nil];
	}


	#pragma mark - Web view delegate method

	- (BOOL)webView:(UIWebView )webView shouldStartLoadWithRequest:(NSURLRequest )request navigationType:(UIWebViewNavigationType)navigationType {
	NSLog(@"%@ %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd));

	NSString scheme, selectorString, *argumentString = nil;

	// Intercept the link
	if (navigationType == UIWebViewNavigationTypeLinkClicked) {
	[webView stopLoading];

	// Grab the parts of the URL we need
	// <scheme>://<host>#<fragment>
	scheme = [[request URL] scheme];
	selectorString = [[request URL] host];
	argumentString = [[request URL] fragment];

	// Check for our selector:// scheme, then match it to a method we'll allow (thanks Mike Ash)
	if ([scheme isEqualToString: @"selector"]) {
	if ([selectorString isEqual: @"linkIntercept"]) {
	[self linkIntercept];
	} else if ([selectorString isEqual: @"linkInterceptWithArgument"]) {
	[self linkInterceptWithArgument: argumentString];
	} else {
	NSLog(@"Could not match selector: %@", selectorString);
	}
	}

	return NO;
	}

	// Let other links be handled by the webview.
	return YES;
	}

	#pragma mark - methods called from web links

	- (void)linkIntercept {
	NSLog(@"%@ %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd));
	}

	- (void)linkInterceptWithArgument:(NSString *)argument {
	// insert code here to make sure argument is something valid for your method
	// and won't cause a crash or load unwanted data (thanks again Mike Ash)
	NSLog(@"%@ %@ %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), argument);
	}