I get this warning in my iOS project: (iOS7, XCode 5 GM)
Warning: Unable to create restoration in progress marker file
I am working on a viewcontroller that turns all black when I get this warning on startup. Deleting the app and restarting XCode sometimes seems to help. I am returning NO on both
-(BOOL)application:(UIApplication *)application shouldRestoreApplicationState:
-(BOOL)application:(UIApplication *)application shouldSaveApplicationState:
Update1: I tested on iPhone4s. Same result. Warning and black screen on my view controller.
Update2: Answered my own question for the black screen. The warning just disappeared in latest iOS 7.0.x versions.
I have not found why this message is printed in the console but I think it was some kind of bug in iOS. With the latest iOS 7 updates I do not get "Warning: Unable to create restoration in progress marker file" anymore.
The more interesting part is the black screen. It happens when you have a normal ViewController and a TableView inside. I had to create TWO outlets between view property of the ViewController and the base view (except the table view there is more views, that is the reason I had to use a generic view controller). There is one connection automatically with every ViewController so that was really strange. I assume it is again some kind of iOS bug.