Update README.md

swiftcodex · swiftcodex · commit c6a0e67e2357 · 2017-10-16T16:38:34.000-04:00
diff --git a/README.md b/README.md
@@ -8,3 +8,6 @@ PaintCode file is included in main directory.
 Resize in Interface Builder!
 
 ![knob in ib](https://i.imgflip.com/1svkul.gif)
+
+For an example of Knobs using callbacks (instead of delegate pattern) see this repo:
+[CallbackKnob](https://github.com/swiftcodex/CallbackKnob)
