How can i get the contents of javascript alert message on UIWebView? - ios

Question

i've been trying to get a message of "javascript alert" on UIWebView.
although it's possible to get the one on Android WebView using by the "onJsAlert" event,
UIWebView doesn't have a kind of the method...
if anyone know the way to do it, please let me know.

Answer 1

You can't do it in simple way(ASAIK).
Let's hack it!
Try to re-define your alert function, remember to pass your alert message of the js alert in
I AM A SPECIAL URL FOR detecting
- (void) webViewDidFinishLoad: (UIWebView *) webView
{
[webView stringByEvaluatingJavaScriptFromString:#"window.alert = function(message) { window.location = \"I AM A SPECIAL URL FOR detecting\"; }"];
}
And get what you want in the alert url:
- (BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSURL* url = request.URL;
// look for our custom action to come through:
if ( [url.host isEqualToString: #"I AM A SPECIAL URL FOR detecting"] )
{
// parsing the url and get the message, assume there is a '='for value, if you are passing multiple value, you might need to do more
NSString* message = [[[[url query] componentsSeparatedByString: #"="] lastObject] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
// show our alert
UIAlertView* alertView = [[UIAlertView alloc] initWithTitle: #"My Custom Title"
message: message
delegate: nil
cancelButtonTitle: #"OK"
otherButtonTitles: nil];
[alertView show];
return NO;
}
return YES;
}