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

This is the solution suggested by Apple:

if #available(iOS 11.0, *) {
    // iOS 11 specific stuff here
} else {
    // non iOS 11 stuff here
}

Please refer to this resource (watch video on mark 6:50 for more details)