Support if-else ios 15 or lower than ios 15

Question

I have specific line of code which only execute if ios version is lower than 15.

I could if-else if ios is great 15 by these.

if #available(iOS 15.0, *) {} else {}

I would to do opposite of it. If ios version is lower than 15 then execute specfic line of code. I know I can write code in else part and it should have work but looking for more ideas and faster way for app

asyncawait · Accepted Answer · 2022-08-26T00:18:54.763

7

For older versions of Swift, that's exactly how you do it.

Swift 5.6 (i.e. Xcode 13.3 or newer) added the condition you're asking for, as #unavailable, so you can now do this:

if #unavailable(iOS 15.0) {
    // only runs if <iOS 15
}

All the details are here: https://github.com/apple/swift-evolution/blob/main/proposals/0290-negative-availability.md

edited Aug 26 '22 at 00:18

answered Aug 25 '22 at 23:48

asyncawait

575
1
9

You gave the right approact but its giving error for me. – EN_Tech Aug 26 '22 at 00:10
Error - "Platform wildcard '*' is always implicit in #unavailable" – EN_Tech Aug 26 '22 at 00:10
Oops, my bad, you don't put the wildcard in. I edited my answer so that it works. – asyncawait Aug 26 '22 at 00:19
so doing like this. if #unavailable(iOS 15.0) {} – EN_Tech Aug 26 '22 at 00:21
Will it support in ios 16. Im sure it wont exectute block of code for ios 15 – EN_Tech Aug 26 '22 at 00:21
I'm not sure I understand what you're asking, but `#unavailable(iOS 15)` will only execute on iOS versions OLDER than 15, so it will also exclude iOS 16. – asyncawait Aug 26 '22 at 00:24

Support if-else ios 15 or lower than ios 15

1 Answers1