When developing for iPhone, the IDE coming in mind is XCode and it’s a good thing cause XCode is a good piece of software. I use XCode everyday but I never found the search functionality good enough. That’s why I switched to ack-grep. It’s a little perl script way faster than grep or any other search functionality. And the result presentation is clear and efficient.
Recently, I had to work on an complex iPhone application developed by another company. ack-grep helped me a lot to dig in the hairy code. Since I’m using this tool I can’t work without it.