Question

I load a portion of data from server and show it in UITableView. When the user scrolls tableView to the bottom of tableView (last cell), I load next portion of data and show it in new cells in tableView (add new cells).

My goal is to show in the bottom cell activity indicator while the data is loading from the server. Is there any standard beautiful and elegant way of implementation? I searched a lot, but found no answer.

Thanks a lot for the answer!

Answer 1

I keep a BOOL isLoadingData in my data model that tracks when data is loading. My tableViewController observes this property via KVO and updates the tableView. I’ve used the following methods to show the activity indicator.

1. in tableView:viewForFooterInSection:, if isLoadingData = YES return a view that contains a UIActivityIndicatorView and a UILabel indicating that data is loading. Otherwise return nil.

2. if isLoadingData = YES, in numberOfSectionsInTableView: add additional section to the count and return 1 for this section in tableView:numberOfRowsInSection:. In tableView:cellForRowAtIndexPath return a “loading” cell that contains a UIActivityIndicatorView and a UILabel.