[BUG] Terminating app due to uncaught exception 'NSGenericException'

[FranklinSamboni]

Describe the bug The framework is generate an app crash when the superview of the custom drop down view is nil.

To Reproduce

• Create an project with two ViewControllers embebed in a NavigationViewController
• In the first one just put a segue to the SecondViewController.
• In the SecondViewController implement the CustomDropDown framework
• Run and navigate to SecondViewController.
• Tap on Back button of Navigation Item, then app crash.

Expected behavior

• An app should be navigated back successfully and the framework shouldn't generate this crash.

Screenshots

Smartphone (please complete the following information):

• Device: Simulator iPhone 11 Pro Max
• OS: iOS 14
• Xcode: 12.0.1

Additional context Copy of error: Terminating app due to uncaught exception 'NSGenericException', reason: 'Unable to activate constraint with anchors <NSLayoutYAxisAnchor:0x6000003b3b80 "TtGC14CustomDropDown14CustomDropDownSS:0x7fb7a340f320.top"> and <NSLayoutYAxisAnchor:0x60000038c000 "TtGC14CustomDropDown18CustomDropDownViewSS:0x7fb7a340e1e0.bottom"> because they have no common ancestor. Does the constraint or its anchors reference items in different view hierarchies? That's illegal.'

[FranklinSamboni]

Yes, I would like.

[tejuamirthi]

I have assigned this to you. Complete this early as there's a crash happening

[tejuamirthi]

Will update the repo tomorrow. Would be great if you could do it by morning tomorrow. Thanks @FranklinSamboni It's just a couple of lines of code

[FranklinSamboni]

Of course, but here in Colombia is morning hehe, so I will fixed soon.

[tejuamirthi]

Please share a screen recording of the working app after the fix. It'd really help. Thanks!

[FranklinSamboni]