如何在我的子类NSTextField / NSTextFieldCell中使用“全选”？

Question

Generally, when editing text in a text field/input/area/editor, pressing ⌘A will select all of the current text in said field/input/area/editor. I've subclassed NSTextField and NSTextFieldCell, and no matter what I try, I can't seem to get basic "Select All" functionality working. I've tried implementing delegate protocols, intercepting events, manipulating commands made by selectors, and every other thing I can think of. What gives? (I can already hear the "Ever heard of Google?" refrains because of how simple this probably is, but I haven't found a single answer out there. I guess I can thank iOS for that.)

And before I forget to mention it, I also dragged a standard NSTextField into my nib to see if a non-subclassed NSTextField implements Select All behavior by default, and to my shock, it doesn't. Am I going crazy here, or am I completely overlooking something? Isn't Select All almost a requirement when implementing a text field? Apple's First Responder proxy handles everything under the sun (including two versions of selectAll ( selectAll and selectAll: ), but the n00b is strong with me, and I can't seem to make sense of any of this.

Any help/ideas would be immensely appreciated. Cheers!

Answer 1

The application menu handles sending the keyboard shortcut actions to the application's current first responder. The missing connection would explain why your regular NSTextField objects are missing this functionality as well.