Enable Undo CoreData SwiftUI

Question

Created Aug ’22

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Does anyone know how to have the Undo command in the menu bar enable when CoreData UndoManager has items to undo?

Here’s what I’ve done:

At app init I’m setting the Core Data PersistanceController UndoManager()

persistenceController.container.viewContext.undoManager = UndoManager()

I can confirm the CoreData undoManager is set because I can programmatically call undo and it works (for instance after deletion)
HOWEVER the Undo command in the menuBar remains disabled.

As a side-note, the Undo command in the menuBar works correctly when I’m writing text in a TextField (it does automatically enable to undo text changes).

Huge thanks in advance, been trying things for a while and can’t find anything online

Answered by MarcMV in 724693022

Here's the solution, via -> https://stackoverflow.com/questions/73422048/enable-undo-coredata-swiftui

@Environment(\.undoManager) var undoManager

// ...

var body: some View {
  // ...
  .onAppear {
     viewContext.undoManager = undoManager
  }
}

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Answer 1

MarcMV OP

Aug ’22

Accepted Answer

Here's the solution, via -> https://stackoverflow.com/questions/73422048/enable-undo-coredata-swiftui

@Environment(\.undoManager) var undoManager

// ...

var body: some View {
  // ...
  .onAppear {
     viewContext.undoManager = undoManager
  }
}

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