Presents the panel as a sheet modal to the specified window.
- macOS 10.6+
The window in which the panel will be presented.
The block called after the user dismisses the panel. The argument passed in will be
NSFileif the user chose the OK button or
Handling Panel OKButton
NSFileif the user chose the Cancel button.
Handling Panel Cancel Button
Configure all the relevant properties of the panel before you call this method. The completion handler block runs after the user dismisses the panel, but while the panel may still be onscreen. If you need to dismiss the panel from the screen—for example, if the completion block displays an alert—close the panel by calling its
order method with the value