Continuing a dive into Xcode's support for debugging, here's a look at other powerful breakpoint features. We start by looking at the console, which you might think is just for logging output, but actually offers a command line interface to LLDB, the low-level debugger. And by using the ability to arbitrarily execute code on that command line, we gain the remarkable ability to change an app's behavior *while* it's running. Plus, for something more visual, we'll see how the QuickLook button can show previews of graphic objects like images (provided you don't crash Xcode like I do in the video).
Xcode on the Mac App Store: geo.itunes.apple.com/us/app/xcode/id497799835?mt=12&at=10l4Gc
Xcode Treasures eBook: pragprog.com/book/caxcode/xcode-treasures