Question

I have created a subclass of UITableViewController that is used as the custom class for a View in my storyboard. The view has a number of sections/rows defined as prototype cells which are instantiated and shown as expected. Most of the UITableView delegate methods simply call the super’s methods that handle section amount, rows, etc.

I have cached content that is used to update the cells on -viewDidLoad and then an asynchronous operation that reloads the content from my server and rebinds the data afterwards (on the main thread, -performSelectorOnMainThread::). It is at this point that, seemingly arbitrarily, some of the cells content (labels primarily) will be cleared of data and not updated to the new data for anywhere between 10-15 seconds. At which point either the content which just show up or sometimes scrolling in the table view will cause the content to appear.

I know the selector is being called and on the main thread, the UI element’s text properties are getting set but randomly they just…don’t update. I’ve tried adding in -setNeedsDisplay on the tableView, controller’s view and -reloadData on the tableView (though the last one seemed unnecessary as they’re prototype cells) all to no avail.

Anyone come across this?

Answer 1

My comment did indeed fix my problem. It seems UILabel‘s are not updated when modified but rather it’s decided internally when to repaint them – regardless if you try to force it with display or setNeedsDisplay.

Solution: Use a UITextView instead of a UILabel