Determine If iOS Code Is Running On MacOS

Question

Created Nov ’20

Replies 2

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Views 1.1k

Participants 3

How do you determine if your iOS app is running on MacOS?

Currently, I am using the following code:

var weHaveMac = false
if #available(iOS 14.0, *) {
if UIDevice.current.userInterfaceIdiom == .mac {
weHaveMac = true
print ("Mac?: \(weHaveMac), system?: \(UIDevice.current.userInterfaceIdiom)")
}
}

But, the UIDevice.current.userInterfaceIdiom == .Mac test always returns false.

I am using Xcode 12.2 Beta with MacOS 11.0.1 Beta.

Answered by DTS Engineer in 646106022

userInterfaceIdiom only returns Mac when the app opts into using the Mac idiom as a Mac Catalyst app. This situation is discussed in Adapting iOS Code to Run in the macOS Environment.

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Answer 1

Claude31 OP

Nov ’20

it is .mac, not .Mac
So code seems OK, but comment below is not.

What do you get from your print statement ?

Could you print the UIDevice.current.userInterfaceIdiom

Code Block 	print("interface", UIDevice.current.userInterfaceIdiom)
    if UIDevice.current.userInterfaceIdiom == .mac {
      weHaveMac = true
      print ("Mac?: \(weHaveMac), system?: \(UIDevice.current.userInterfaceIdiom)")
    }

When you test if #available(iOS 14.0, *)
on a Mac, it fails most likely

You should probably test like:

Code Block if #available(iOS 14.0, *), #available(macOS 11.0, *)  {

0

Answer 2

DTS Engineer OP

Apple

Nov ’20

Accepted Answer

userInterfaceIdiom only returns Mac when the app opts into using the Mac idiom as a Mac Catalyst app. This situation is discussed in Adapting iOS Code to Run in the macOS Environment.

0