使用javascript在UIWebView中隐藏div

我正在尝试使用java脚本从网页中隐藏一些div，但是它似乎不起作用，有人能帮我吗，这是我的代码

- (void)viewDidLoad
{

[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

NSString *urlAddress = @"http://tvmdn.org/";

//Create a URL object.
NSURL *url = [NSURL URLWithString:urlAddress];

//URL Requst Object
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];

//Load the request in the UIWebView.
[webView loadRequest:requestObj];

[self.webView stringByEvaluatingJavaScriptFromString:@"var script = document.createElement('script');"  

 "script.type = 'text/javascript';"  

 "script.text = \"function hideID(idName) { "  

 "var id = document.getElementById(idName);"  

 "id.style.display = 'none';"

 "}\";" 

 "document.getElementsByTagName('head')[0].appendChild(script);"];  

[self.webView stringByEvaluatingJavaScriptFromString:@"hideID('headerbar');"];  

}

---

谢谢，Sami。

您不需要像那样注入javascript（通过动态创建脚本元素）。您应该可以这样做：

- (void)webViewDidFinishLoad:(UIWebView *)webview{
    NSString *js = @"var element = document.getElementById('headerbar');  element.style.dislay = 'none';";
    NSString *res = [webview stringByEvaluatingJavaScriptFromString:js];
   [super webViewDidFinishLoad:webview];
}

将您的类设为a

UIWebViewDelegate

（请参见：）并按如下方式实现javascript：

- (void)webViewDidFinishLoad:(UIWebView *)webview{
    NSString *js = @"var element = document.getElementById('headerbar');  element.style.dislay = 'none';";
    NSString *res = [webview stringByEvaluatingJavaScriptFromString:js];
   [super webViewDidFinishLoad:webview];
}

---

布伦丹的回答是正确的，但这是对上述问题的一个微妙的转变

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

    [webView stringByEvaluatingJavaScriptFromString:@"(\".classIdToHide\").hide();"];
}