Coordinator Cleanup

[heyltsjay]

A few things here:

• Simplifies Coordinator down to class Coordinator: NSObject {}
• Moves presentation style to be determined by parents
• Adopts a pattern to attach to children so that Coordinator lifecycles are ultimately determined by the View/Navigation hierarchy. This reduces the need to hold any reference to children and eliminates the need to hold strong references to children, which is now forbidden.
• Removes some noise from the demo code to just demonstrate the pattern and little else.

[chrisballinger]

Is this something that should be revisited soon?

[heyltsjay]

Hey @chrisballinger, Rob V and I are currently taking the pattern for a spin. We're curious if the attach pattern in combination with style rules (only holding weak references to children) will help iron out some common ownership issues that come from typical Coordinator/Controller patterns.

[heyltsjay]

Seems a little too opinionated to merge into the template before someone gets some insight by using it in a client project. Open to feedback!