首先，使用以下命令修改文件修改权限
sudo chmod 666 /Applications/Xcode.app/Contents/Frameworks/IDEKit.framework/Resources/IDETextKeyBindingSet.plist
sudo chmod 777 /Applications/Xcode.app/Contents/Frameworks/IDEKit.framework/Resources/
然后打开
open /Applications/Xcode.app/Contents/Frameworks/IDEKit.framework/Resources/IDETextKeyBindingSet.plist
添加以下属性
<key>My Custom Keys</key>
<dict>
<key>Move Line Up</key>
<string>selectLine:, cut:, moveUp:, moveToBeginningOfLine:, paste:, moveUp:</string>
<key>Move Line Down</key>
<string>selectLine:, cut:, moveDown:, moveToBeginningOfLine:, paste:, moveUp:</string>
<key>Duplicate Line</key>
<string>moveToBeginningOfLine:, deleteToEndOfLine:, yank:, insertNewline:, moveToBeginningOfLine:, yank:</string>
<key>Delete Line</key>
<string>selectLine:, delete:</string>
</dict>
最后，重启Xcode，在Xcode Key Bindings里找到相应的条目，设置可用的快捷键
image.png
