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I need to load some data in a table view and while this is going on in the background I want to add an activity indicator in order to show that there is a process going on and will hide once the process finishes. What would be the most efficient way to implement something like this?
Depends, whether you want to block your user or not and also how important is the activity indication.
If you don’t want to block user, use
Application.networkActivityIndicatorVisible, if you want to have larger activity indicator and still not to block user, animate UIView with text and UIActivityIndicator below the table view (tableview.height -= activityview.height) and then hide on complete or if you would like to block user, use blocking activity indicator.