by on 30. Sep, 2009 in Early this summer I started playing around with MacRuby, which lets Rubyists create native OS-X applications. While I love Objective-C, scripting languages have speed-of-development, memory management simplicity, and other advantages. Getting Ruby running on the iPhone is challenging; while I’m sure it’ll get there, I wanted something sooner. I started investigating how I might wire up — and then write native iPhone apps from — a scripting language. Lua was on my radar already. It’s compact, expressive, fast enough, and was designed to be embedded. Took only about 20 minutes to get the Lua interpreter running on the iPhone. The real work was to bridge Lua and all the Objective-C/CocoaTouch classes. The bridge had to work in two directions: it would need to be able to create CocoaTouch objects and also be able to respond to callbacks as part of the familiar delegate/protocol model. I Read More