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

You can achieve, by doing this for function like below

@available(iOS 11.0, *)
func myFunction() {
 // function defination 
}

Or if you want check inside function write this

if #available(iOS 11.0, *) {
    // iOS 11 specific stuff here
} else if #available(iOS 10.0, *) {
   // iOS 10 specific stuff here
} else {
    // non iOS 11 & 10 stuff here
}