https://developer.apple.com/library/archive/documentation/IDEs/Conceptual/CustomClassDisplay_in_QuickLook/CH01-quick_look_for_custom_objects/CH01-quick_look_for_custom_objects.html#//apple_ref/doc/uid/TP40014001-CH2-SW2

Enabling Quick Look for Custom Types

Shows how to enable custom object types for display with the Xcode variables Quick Look feature.

8:40 AM

ObjectiveCとして - (id)debugQuickLookObject メソッドで実現されてるので無理そうじゃない？