swift – 如何使struct和typealias符合@objc

public typealias SwiperData = (image: UIImage,title: String)

public struct SwiperPeekViewControllers{
  public var parentViewController: UIViewController!
  public var contentViewController: UIViewController!
  public init(parentVC: UIViewController,contentVC: UIViewController){
    parentViewController = parentVC
    contentViewController = contentVC
  }
}

协议

@objc public protocol SwiperPeekViewDelegate: class{
      func didUndoAction(index: Int,dataSource: SwiperData) 
// Method cannot be a member of an @objc protocol because the type of the parameter 2 cannot be represented in Objective-C
      func swiperPeekViewControllers()->SwiperPeekViewControllers
      func swiperPeekViewSize()->CGSize
    }