Swift-继承并遵循协议的泛型

Question

I basically have this protocol

  protocol ReusableView {
     static var reuseIdentifier: String { get }
  }

and this generic class

  class ListController<Item: Equatable, Cell: UITableViewCell>: UIViewController where Cell: ReusableView {

      private var items: [Item]

      init(items: [Item]) {
         self.items = items
         super.init(nibName: nil, bundle: nil)
         print(Cell.reuseIdentifier)
      }
  }

When I try to print the reuseIdentifier, I get this compiler error

Instance member 'reuseIdentifier' cannot be used on type 'Cell'

I should be able to access the property since the Cell Object conforms to the ReusableView protocol.

I don't know what the problem is. Any help would be appreciated.

Thanks

Answer 1

The problem is occurring because Cell must inherit from UITableViewCell which already defines an instance variable reuseIdentifier . Simply changing the name of reuseIdentifier to reusableViewIdentifier or something will cause the error to go away.