Jobs’s letter today was a bit in the tone of, “Hey, you kids, get off my lawn! We still have to get rid of the gophers, resod the grass, and finish the main house before we let you on it in a few months, you little…”
At the end, Glenn speculates about a possible “iPhone version of Leopard”, and assumes that the current iPhone OS is based on Tiger, but that’s misguided. iPhone OS X already contains technologies new to the Mac in Leopard. For example, the iPhone has LayerKit, which was an early name for the Cocoa framework now called Core Animation. (In Mac OS X 10.5, Core Animation is part of the QuartzCore umbrella framework, and there isn’t anything called “LayerKit”.) Better to think of Mac OS X and iPhone OS X as two sibling products derived from the same core technologies and frameworks than to think of iPhone OS X as a child of Mac OS X.
I’ll bet Glenn’s right, though, that there will be a signficant iPhone OS update before the SDK appears.
★ Wednesday, 17 October 2007