How to Reload a UITableView While I am Looking at It

Question

When I have a UITableView as part of the visible view controller, how can I reload it so that the data I am looking at changes to the new data. Just calling reload doesn't seem to refresh the data until I scroll it.

Answer 1

Calling the reloadData method refreshes the data as soon as the method is called. It does not wait for the table to be scrolled. Make sure the data source (array or dictionary or wherever you've saved the values) is changed before you call reloadData.

Answer 2

Are you refreshing the data off the main thread? If so, you need to call the reloadData method using the following method:

- (void)performSelectorOnMainThread:(SEL)aSelector withObject:(id)arg waitUntilDone:(BOOL)wait

So for a tableView it would be:

[tableView performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:NO];