Compiler can, after opening the emulator does not show too will automatically quit.

Conditions such as the title suggests, the command line prompt as follows:
terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '- [UIViewController _loadViewFormNibNamed: bundle:] loaded the "Day3viewController" nib but the view outlet was not set'
terminate called after throwing an instance of 'NSException'
As the figures can not be directly, so only put so much, there are a bunch of tips above things posted here only a key part.
Would like to ask what it is that way.
Reply:
I just would like a view associated with the view. But I do not know why.