IOS project showing error “An internal error occurred. Editing functionality may be limited” on xcode 7.1

Question

I just created one new cordova ios project via CLI, and i opened that project in Xcode 7.1 and while running on simulator am getting some error on mainViewController.xib, if

Answer 1

FWIW, here's what fixed this for me:

I was performing an operation on a value in a dictionary:

_outcomes[key] *= multiplier

I didn't realize that Swift would treat the value as an optional even though the dictionary is not an optional in this class.

changing to the following worked:

_outcomes[key]! *= multiplier