Also experiencing this issue. Xcode 13.1 does not have this warning. Xcode 13.2 does. When the conversion process is ran it does not make any changes.
iRyan8
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On Xcode 12.1, SwiftUI Previewer crashes when it references another swift package it depends on and that swift package uses Bundle.module.
Basic code snippet that crashes:
		import SwiftUI
		import Theme // Import package that uses Bundle.module
		/// This view will crash the previewer
		struct ThisViewCrashesPreview: View {
				var body: some View {
						Text("Hello, World!")
								// If you comment out the following line, the previewer will render
								.foregroundColor(Color.themeGreenFromXCAssets)
								// Or use this line, the preview will also start to work
								.foregroundColor(Color.colorThatDoesNotUseModuleReference)
				}
		}
		struct ThisViewCrashesPreview_Previews: PreviewProvider {
				static var previews: some View {
						ThisViewCrashesPreview()
				}
		}
Code from Theme package:
		import SwiftUI
		public extension Color {
				
				static let themeGreenFromXCAssets = Color("ThemeGreen", bundle: .module)
				
				static let colorThatDoesNotUseModuleReference = Color.init(red: 0.3, green: 0.6, blue: 0.9)
				
		}
Crash Log States:
Application Specific Information: Fatal error: unable to find bundle named ThemeTheme: file Theme/resourcebundle_accessor.swift, line 27 Same issue reported here: https://stackoverflow.com/questions/64540082/xcode-12-swiftui-preview-doesnt-work-on-swift-package-when-have-another-swift/64664692#64664692
To reproduce:
Download code at: https://github.com/ryanholden8?tab=repositories See repo SwiftUI-Preview-Failing-Test-Project
Open PreviewFailingTestProject.xcodeproj
Change Target at the top of the Xcode window from PreviewFailingTestProject to MyUICode
Change deployment device to iPhone 12 mini (or any iOS device)
Open file: LocalPackages > MyUICode > Sources > MyUICode > ThisViewCrashesPreview.swift
Try to use the SwiftUI Previewer
Crash will occur and preview will not render, see lines 8-11 of ThisViewCrashesPreview.swift for more details
NOTE: See file: PreviewFailingTestProject > PreviewFailingTestProjectApp.swift > MainWindow View on lines 13-19. This renders fine on both the SwiftUI Previewer and when deployed to device.
This is possible now via Menu - https://developer.apple.com/documentation/swiftui/menu (iOS 14+)
Menus are covered in this WWDC video - https://developer.apple.com/videos/play/wwdc2020/10052/ at ~11:15.
Playground Example:
import SwiftUI
import PlaygroundSupport
		
		struct ContentView: View {
				
				var body: some View {
						HStack {
								// Other views
								Text("Example View 1")
		
								// Button, that when tapped shows 3 options
								Menu {
										Button(action: {
												
										}) {
												Label("Add", systemImage: "plus.circle")
										}
										Button(action: {
												
										}) {
												Label("Delete", systemImage: "minus.circle")
										}
										Button(action: {
												
										}) {
												Label("Edit", systemImage: "pencil.circle")
										}
								} label: {
										Image(systemName: "ellipsis.circle")
								}
						}
						.frame(width: 300, height: 300, alignment: .center)
				}
		}
		
		PlaygroundPage.current.setLiveView(ContentView())