http://www.developers-life.com/touchbegantouchend-in-custom-uiwebview.html I am trying to detect a double tap on UIWebView as per link mentioned above. The problem is that it compiles and runs well, but when it executes [self __touchesBegan:touches withEvent:event]; it crashes with unrecognised selector. when i put mouse over self, i see it to be pointing to UIWebBrowserView * Where does this class come from ? What is that term "UIWebDocumentView" meaning here in the code ? please help, thanks in advance.