Xcode Previews are a great new feature, and I've been adding #Preview blocks to some of my more complex UIKit files so I can tweak their UI without running the app. It's been a blast so far.
The only problem is that I apparently have to set my project deployment target to iOS 17.0 to use them at all. If I set it to iOS 16.0, I get these errors:
- 'Preview' is only available in iOS 17.0 or newer
- 'init (_:traits:body:' is only available in iOS 17.0 or newer
- 'UVPreviewRegistry' is only available in iOS 17.0 or newer
- 'Preview' is only available in iOS 17.0 or newer
- 'init (_:traits:body:' is only available in iOS 17.0 or newer
I tried surrounding #Preview with an @availability block for iOS 17, but got the same errors.
My goal is to be able to leave useful #Preview blocks in my source code, but still set my deployment target to iOS 16.
Is this possible?
Hi,
Sorry to hear you are having problems with previews. It is a known issue that currently using the #Preview macro does not allow building in projects with a deployment target < 17.0 or running on a device running a version of iOS < 17.0. The workaround is to revert to using a PreviewProvider. You can still preview UIKit things using that older API, but it requires you to use UIViewRepresentable to bridge it to a SwiftUI view.
