1、给webView 添加手势方法

ios 5以后要重写这个方法并加上手势协议才能点击  把协议委托给控制器 在webView上加手势

UIWebViewDelegate

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{

return YES;

}

2、获取webView的高度

-(void)webViewDidFinishLoad:(UIWebView *)webView{

int webViewHeight = [[webView stringByEvaluatingJavaScriptFromString: @"document.documentElement.scrollHeight"] intValue];

}

3、获取标题、当前页面的URL 

NSString*currentURL=[webViewstringByEvaluatingJavaScriptFromString:@"document.location.href"];

NSString*title=[webviewstringByEvaluatingJavaScriptFromString:@"document.title"];

4、修改界面元素的值

NSString*js_result=[webViewstringByEvaluatingJavaScriptFromString:@"document.getElementsByName('q')[0].value='中国';"];