How to show the Network Activity Indicator (spinning wheel in the iOS status bar)

Here’s how you start it:

UIApplication *application = [UIApplication sharedApplication];
application.networkActivityIndicatorVisible = YES;

And this is how you stop it:

UIApplication *application = [UIApplication sharedApplication];
application.networkActivityIndicatorVisible = YES;

Comes in handy when displaying a UIWebView or performing any other activity that requires the user to “hang in there for a bit”. If you want to create the same effect within a view see here.

Note that you need to conform to the UIWebViewDelegate protocol for this method to be called.