I picked but it did not stick

This last section with the custom picker did some neat things, really neat things. It basically built a working slot machine which gave the user a winning message as well as some neat sounds. When you hit the spin button it makes a cool sound and when you win it makes a cool sound. There is the motion of the spinner which is neat too.

All of the stuff that got me there is wild. There are selectors, audio components, and this wild sentence:

AudioServicesCreateSystemSoundID((__bridge CFURLRef)soundURL, &soundID);

... and there is this &soundID that is from the "C" stuff that I learned a few months back. There is that __bridge thing, the CFURLRef, too much going on. Have no idea what he is saying -- intimidated again. There is so much to learn.

I am debating to go forward to chapter 8 or go back and review this stuff from chapter 7. I guess I could do both -- I just want to move to the next chapter already as it has been a long time already.