runModal()
Runs the alert as an app-modal dialog and returns the constant that identifies the button clicked.
Declaration
func runModal() -> NSApplication.ModalResponseReturn Value
A response to the alert. See this method’s “Special Considerations” section for details.
Discussion
You can create the alert either through the standard allocation and initialization procedure or, if necessary in your app, by using the deprecated compatibility method alertWithMessageText:defaultButton:alternateButton:otherButton:informativeTextWithFormat:.
Special Considerations
This method can return values other than those specific to the alert buttons (alertFirstButtonReturn, alertSecondButtonReturn, and so on) if the alert is canceled programatically.
If you use alertWithMessageText:defaultButton:alternateButton:otherButton:informativeTextWithFormat: to create an alert, the NSAlertDefaultReturn, NSAlertAlternateReturn, and NSAlertOtherReturn constants identify the button used to dismiss the alert. Otherwise, the constants used are the ones described in addButton(withTitle:).