Re: Why are the simplest things the hardest?
Re: Why are the simplest things the hardest?
- Subject: Re: Why are the simplest things the hardest?
- From: Allan Odgaard <email@hidden>
- Date: Thu, 05 Jul 2018 10:31:13 +0200
On 5 Jul 2018, at 6:44, Rick Mann wrote:
Annoying I have to have a first responder view just to allow even my
Document to respond to menu commands.
Quoting the
[documentation](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/EventOverview/EventArchitecture/EventArchitecture.html):
For document-based applications, the default responder chain for the
main window consists of the following responders and delegates:
1. The main window’s first responder and the successive responder
objects up the view hierarchy
2. The main window itself
3. The window's NSWindowController object (which inherits from
NSResponder)
4. The main window’s delegate.
5. The NSDocument object (if different from the main window’s
delegate)
6. The application object, NSApp
7. The application object's delegate
8. The application's document controller (an NSDocumentController
object, which does not inherit from NSResponder)
As you can see, both the window’s delegate, application object’s
delegate, and the `NSDocument` instance itself, is part of the responder
chain, which is where you would implement your menu item actions.
Implementing action methods in the view hierarchy should only be used
for view-specific actions such as `copy:` and `paste:` (which would
depend on the first responder, i.e. ⌘C does different things depending
on which view is the first responder, but e.g. ⌘S should always go to
the document’s `saveDocument:` action).
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