Black blank screen and crash on iPhone 4 for any app

Question

This has happened with Xcode Beta (7.0) and Xcode (6.4).

I'm trying to debug my app with my iPhone 4 (iOS 7.1.2) and I set my Deployment Target under iOS 7.0. When I run my app, I can't see the LaunchScreen but instead it's a black blank screen and then it crashes.

I'm not giving any piece of code, because when I create a new default project , setting the Deployment Target right, I get the same crash .

2015-09-13 16:06:07.026 GafasApp2[243:60b] -[MasterViewController topViewController]: unrecognized selector sent to instance 0x14d83420 2015-09-13 16:06:07.033 GafasApp2[243:60b] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MasterViewController topViewController]: unrecognized selector sent to instance 0x14d83420' * First throw call stack: (0x30a57f83 0x3b208ccf 0x30a5b917 0x30a5a203 0x309a9768 0x85cc3 0x332e4587 0x332e3edb 0x332de56b 0x3327a6e9 0x33279851 0x332ddca9 0x35892aed 0x358926d7 0x30a22a67 0x30a22a03 0x30a211d7 0x3098bebf 0x3098bca3 0x332dced1 0x332d814d 0x86fbd 0x3b715ab7) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)

I've been always developing with iPad air 2 but now I need my iPhone 4 to test some things, but I can't use it as I mentioned.

Do you have any clue?

Thank you very much.

Answer 1

First, try running the app in a different device and one of the simulators. This will let you know if the problem is one specific device.

Second, the main problem appears to be that your are calling a method that does not exist. Add an exception brreakpoint . This should break where the unrecognized selector is called.