wait_fences: failed to receive reply: 10004003 error - UIAlert WITHOUT UITextField present

Question

I am working on an app where a UIAlert pops up the first time the user begins using it to ask if they want to use their current location. This happens within the main contro

Answer 1

I had a similar problem. I was adding an observer in the ViewDidLoad for a reachability notification, which was getting posted before the ViewDidAppear was finished.

So the ViewController was trying to display one UIAlertView before its own View was drawn completely.

I moved the adding of Observers to the ViewDidAppear, and started the startNotifier of reachability in the ViewDidAppear. Also the call to [super viewDidAppear] was missed from the code. Both these issues corrected, the app became working fine again.

If you get this wait_fences: failed to receive reply: 10004003 error once, you may not be able to present any modal ViewControllers in the app further. This was the problem I had in my app. Sometimes when trying to present one modal ViewController, the app would go into an infinite loop.

As Alan said, always remember to "Try showing the UIAlert in -viewDidAppear:(BOOL)animated. -viewDidLoad is called when your view is loaded, but before it is on screen."