Preview Macro Bug
🚨 Bug
CompileDylibError: Failed to build ContentView.swift
Compiling failed: main actor-isolated let 'previewContainer' can not be referenced from a non-isolated context
✅ Solution
1.
#Preview {
MainActor.assumeIsolated {
ContentView()
.frame(minWidth: 500, minHeight: 500)
.modelContainer(previewContainer)
}
}
2.
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
.modelContainer(previewContainer)
}
}
3.
#Preview { @MainActor in
ContentView()
.frame(minWidth: 500, minHeight: 500)
.modelContainer(previewContainer)
}
5.
#Preview {
MainActor.assumeIsolated {
ContentView()
.frame(minWidth: 500, minHeight: 500)
.modelContainer(previewContainer)
}
}
[forum link]
https://developer.apple.com/forums/thread/731134
Error after adding previewContaine… | Apple Developer Forums
I asked Chatgpt for this question, and it told me this: #Preview { MainActor.assumeIsolated { ContentView() .frame(minWidth: 500, minHeight: 500) .modelContainer(previewContainer) } } It worked.
developer.apple.com
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