How to interrupt, delay or stop a MacOS SwiftUI App from terminating
To show an alert pop-up that delays a MacOS app from closing (i.e. closing when a user quits), create a custom App Delegate and implement in the App struct.
To show an alert pop-up that delays a MacOS app from closing (i.e. closing when a user quits), create a custom App Delegate and implement in the App struct.
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Step One: Create the Delegate
In your app, create a new file called AppDelegate and paste in the code below.
Step Two: Implement the Delegate in the App
Within the main App struct of the project, add the line below to implement the delegate.
@NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegateStep Three: Test
Run the code and attempt to quit the app.
The alert should show up when you do.
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