When you call <code>-reloadData</code> on a table view instance, does it make all <code>UITableViewDataSource</code> calls async? Thank you.

This method actually just removes all the <code>UITableViewCell</code> views from the table. The data source delegate methods are called when the table is repainted. So, it's asynchronous. Edit: Actually, some calls ARE synchronous. The number of sections & rows and row heights are updated immediately, so, for example <code>contentSize</code> is set correctly after the call. On the other hand, <code>tableView:cellForRowAtIndex:</code> is not called until the table is repainted.

Is -[UITableView reloadData] asynchronous or synchronous?

When you call -reloadData on a table view instance, does it make all UITableViewDataSource calls async? Thank you.

This method actually just removes all the UITableViewCell views from the table. The data source delegate methods are called when the table is repainted.

So, it's asynchronous.

Edit:

Actually, some calls ARE synchronous. The number of sections & rows and row heights are updated immediately, so, for example contentSize is set correctly after the call. On the other hand, tableView:cellForRowAtIndex: is not called until the table is repainted.