“ AppDelegate”仅在iOS 10.0或更高版本上可用

Question

I am declaring AppDelegate instance for calling method reside in AppDelegate but it is giving me error as 'AppDelegate' is only available on iOS 10.0 or newer , but I want to use AppDelegate instance in iOS 9 also. If I will change my deployment target as iOS 10 then the code is working fine for me but I can not able to run project with deployment target 9.0. I am using Xcode 10.1 and Swift 4.2 in my Xcode project.

Please check my below code and let me know if I am doing something wrong .

let appDelegate = UIApplication.shared.delegate as! AppDelegate
appDelegate.ShowErrorPopUpWithErrorCode(strError:"This is test error message")

Appreciated your help.

Thanks.

Answer 1

You probably have something like this on you're app delegate:

And obviously this way you cannot call app delegate

Either change your minimum deployment target or use frameworks that work with every iOS version you're targeting.