Xcode自定义键绑定命令完整列表及官方API咨询

Hey there! Let's break down what you need to build that handy { } shortcut and unlock more complex key bindings.

1. How to Get the Complete List of Usable Commands #

Check the System's Default DETextKeyBindingSet.plist First #

You can directly inspect the system file to see pre-defined bindings using Terminal:

plutil -p /System/Library/Frameworks/AppKit.framework/Versions/Current/Resources/DETextKeyBindingSet.plist

Or navigate to that path manually (right-click AppKit.framework > "Show Package Contents" to get into Resources) and open the plist with a text editor. But heads up—this only shows a subset of available commands. The real full list comes from the underlying AppKit framework.

Dig Into NSTextView's Methods for All Possible Commands #

Every command you can use in key bindings is actually an Objective-C selector (method name) from NSTextView (and its subclasses, which power almost all text input fields on Mac). Any NSTextView method that takes no arguments or a single id parameter works for key bindings.

To see the full list, look up the NSTextView class reference—you'll find tons of useful commands beyond the ones you've already spotted, like:

• moveToEndOfLine:
• selectToBeginningOfParagraph:
• pasteAsPlainText:
• deleteBackward:
• insertTab:

2. Official API Context #

Apple doesn't have a standalone API doc just for text key bindings, but these commands are rooted in AppKit's Text System. The official resources you want are:

• The NSTextView class reference: This is the source of all your bindable commands—every method listed here that fits the signature is fair game.
• Apple's Text System Programming Guide: It explains how Mac's text handling works under the hood, including how key bindings map to these methods.

3. Example: Build Your { } Shortcut #

To make a shortcut that inserts { } and drops the cursor right in the middle, edit your custom key bindings file (usually ~/Library/KeyBindings/DefaultKeyBinding.dict) and add this:

"^$[" = (
    insertText:"{",
    insertText:"}",
    moveBackward:,
);

• ^$[ is the shortcut for Ctrl+Shift+[—swap this for any combo you prefer.
• The array runs commands in order: insert {, insert }, then call moveBackward: to jump the cursor between them.

For something fancier, like wrapping the current word in brackets, try this:

"^$]" = (
    selectWord:,
    insertText:"{",
    yank:,
    insertText:"}",
    moveBackward:,
);

内容的提问来源于stack exchange，提问作者Charles Bentley