It wasn't clearly explained in the blog post, but that .lldbinit command should be all on one line. It creates a new command, ”rd”, that can be used in two way

It wasn't clearly explained in the blog post, but that .lldbinit command should be all on one line. It creates a new command, ”rd”, that can be used in two ways. Typing “rd” by itself does “po [[UIApp keyWindow] recursiveDescription]”, so it dumps your entire on-screen view hierarchy. Typing “rd someview” does “po [someview recursiveDescription]”, so it dumps the view hierarchy starting at a specific view. For Mac (Cocoa) apps, the equivalent message is _subtreeDescription, but since a window is not a view, the entire-hierarchy command needs to be “po [[[NSApp frontWindow] contentView] _subtreeDescription]”.