concept network activity indicator in category ios

This is an excerpt from Manning's book iOS Development with Swift. Login to get full access to this book.

14.12. Displaying the network activity indicator

If a networking task can take more than a couple of seconds, it’s a good idea to indicate this to the user with a network activity indicator in the status bar (see figure 14.10).

Figure 14.10. Network activity indicator

Displaying the network activity indicator is straightforward—all that’s needed is to set the isNetworkActivityIndicatorVisible property of the UIApplication to true.