1.获取整页的html
NSString * htmlString = [webViewstringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName('html')[0].innerHTML"];
2.获取网页的title
NSString *title = [webViewstringByEvaluatingJavaScriptFromString:@"document.title"];
http://www.360doc.com/content/11/1124/18/5699910_167089904.shtml