Xcode 9 does not support building or migrating Swift 2.x targets

[tensafefrogs]

After High Sierra upgrade, I'm seeing this with a project (which built successfully before the upgrade). This is when opening the Runner.xcworspace file in XCode.

The target “location” contains source code developed with Swift 2.x. Xcode 9 does not support building or migrating Swift 2.x targets.

Use Xcode 8.x to migrate the code to Swift 3.

Any chance we could get a quick upgrade to Swift 3?

[Lyokone]

Hi !
Do you have this error when building the actual app for deployment or just when you run your app on a device ? I cannot reproduce this error when using flutter run on iOS simulator.

[tensafefrogs]

This is just when opening the Runner.xcworkspace in my project which includes this plugin.

I'll try cloning the example app here and see if it happens there as well.

[tensafefrogs]

Ok, the example app opens and builds, must be something in my project.

I do see a red flutter error view when running it on an iPhone X simulator, something about an assert failing about children not being null, but perhaps that's another issue.

Cheers!