Swift Style Guide - Protocol Conformance

[mrschroeder]

I suggest we add the following (from Wenderlich)

Protocol Conformance

When adding protocol conformance to a class, prefer adding a separate class extension for the protocol methods. This keeps the related methods grouped together with the protocol and can simplify instructions to add a protocol to a class with its associated methods.

Also, don't forget the // MARK comment to keep things well-organized!

Preferred:

class MyViewcontroller: UIViewController {
// class stuff here
}

// MARK: - UITableViewDataSource
extension MyViewcontroller: UITableViewDataSource {
// table view data source methods
}

// MARK: - UIScrollViewDelegate
extension MyViewcontroller: UIScrollViewDelegate {
// scroll view delegate methods
}
Not Preferred:

class MyViewcontroller: UIViewController, UITableViewDataSource, UIScrollViewDelegate {
// all methods
}