如果您正在使用WebView，则在ViewDidLoad中编写startAnimating ActivityIndi​​cator，此代理方法将在您加载数据时自行调用

If you are using WebView then write startAnimating ActivityIndicator in ViewDidLoad and this delegate method will call by itself when your data will be loaded

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
   //[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
   [ActivityIndicator stopAnimating];    
}

希望有所帮助。谢谢：）

Hope it helps.Thanks :)