Negate #available statement

Question

I want to execute a code block only on devices running with an OS older than iOS8. I can\'t do:

if #available(iOS 8.0, *) == false {
    doFoo()         


        

Answer 1

simple way to check is to create the function

func isNewFeatureAvailable() -> Bool {
    if #available(iOS 9, *) {
        return true
    } else {
        return false
    }
}

Use:

if isNewFeatureAvailable() {
    // use new api
} else {
    // use old api
}

OR just use inline

if #available(iOS 9, *) {
   // use new api
} else {
   // use old api
}