What's the Swift equivalent of Objective-C's “#ifdef __IPHONE_11_0”?

Question

I want to use Xcode 9 to add iOS 11 code to my project while keeping the option to compile the project with Xcode 8 which only supports iOS 10.

In Objective-C I can do t

Answer 1

If you want to put the condition outside of the function, you could do it like below.

@available(iOS 11.0, *)
func functionName() {
 // function contents
}