How do we know if ios app is crashed in last launch?
I would like to reset some settings when app is launched and finds that app was crashed in last session. Like not to prompt for rating.
One way would be to create an empty file, say, lock_file.tmp, in the documents folder from the applicationDidBecomeActive: app delegate method, and delete that file inside the applicationWillResignActive: method.
Normally, the app should see no lock_file.tmp file in applicationDidBecomeActive: in the documents folder, because applicationWillResignActive: deletes it. If the app crashes, however, the file would remain there, so your program would be able to detect that the previous run has been interrupted due to a crash.