Seems like I’ve figured out what you can do
-
I used
NSClassFromString()
to check if class is available on device, i.e.if NSClassFromString("UIBlurEffect") { let blur = UIBlurEffect(...) //... } else { //... }
-
It’s needed to make
UIKit.framework
(or another corresponding framework) optional. If you create Swift-based application in XCode6-BetaX, all the frameworks wouldn’t be explicitly added to the link build phase so you need to go to your target settings, addUIKit.framework
as a linked framework (in ‘Link Binary With Libraries’ section) and to change its status toOptional
. This step does the trick and I’ve managed to run version specific code without a problem.
Update: You don’t need to make it optional anymore, since Xcode 6 beta 6 (via @user102008)
Update 2: You can’t actually perform implicit if statement checks for nil (since Xcode 6 Beta 5). You need to assert it like that:
if NSClassFromString("UIBlurEffect") != nil {
let blur = UIBlurEffect(...)
//...
}
else {
//...
}
(via @daniel-galasko)