3

I'm using Xcode 11.1 and all of my swift previews show the following errors:

swiftui preview pane error

Cannot preview in this file -- current target needs adjusted build settings

along with

"ProjectTests.xctest' failed to get build settings: unsupportedProductType("com.apple.product-type.bundle.unit-test", <Xc..."

Clicking the diagnostics button generates the following popup:

enter image description here

Open file has supported build settings "ProjectTests.xctest" failed to get build settings: unsupportedProductType("com.apple.product-type.bundle.unit-test", <Xcode3TargetProduct:0xblahblahblahProjectTests.xctest blueprint:< Xcode3Target:0xblahblahProjectTests>>)

My previews still render fine, but is there some way to remove this error?

Voltron
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2 Answers2

2

Change Destination to some Simulator instead of "iOS Generic Device" or in preview provider specify preview device explicitly, like

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
        .previewDevice("iPhone 11")
    }
}

Xcode Version 11.1 (11A1027)

Asperi
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    Thanks @Asperi! I have tried both `.previewLayout(.device)` and `.previewDevice("iPhone 11")` as well as choosing a specific device rather than "Generic iOS Device" and haven't noticed a change. – Voltron Nov 02 '19 at 20:17
0

This error no longer exists in Xcode Version 11.2 (11B52).

Voltron
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