ios - Received Error in fetching the root view controller

Question

I'm new to IOS Development. I tried to find out a root view controller using the below code :

print("UIApplication.shared.keyWindow?.rootViewController : " , UIApplication.shared.keyWindow?.rootViewController)

I applied this line in two views. one view it's working fine. But another View it's getting the error like below:

Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArray0 objectAtIndex:]: index 0 beyond bounds for empty NSArray

Does anyone know how to solve this error?. Thank you in Advance.

Answer 1

For swift 5 and above use following command

print("UIApplication.shared.windows.first!.rootViewController : " , UIApplication.shared.windows.first!.rootViewController)