The Jump Bar in Xcode, is extremely useful, for any dev to quickly jump to different spots in the same file:
A really great thing you can do, is to add different marks to this bar. Like this:
You can add these to your code:
// MARK: // TODO: // FIXME: // ???: // !!!:
You can also read this (more extensive and not entirely related) article about the role of #pragma mark on the Clang Manual.