在以下代码中,我得到了错误。
将非转义参数“ completion”传递给期望 @转义闭包。
protocol DetailViewControllerDelegate: AnyObject {
func detailViewController(_ controller: DetailViewController, doneButtonPressed button: UIBarButtonItem)
}
final class DetailViewControllerDelegateHandler: DetailViewControllerDelegate {
typealias DismissComplete = () -> Void
typealias Action = (DismissComplete) -> Void
var dissmissScene: Action?
private let model = Model()
func detailViewController(_ controller: DetailViewController, doneButtonPressed button: UIBarButtonItem) {
dissmissScene? { [unowned self] in
let value = controller.value
self.model.update(with: value)
}
}
}
final class HomeViewController: UIViewController {
private let delegateHandler = DetailViewControllerDelegateHandler()
override func viewDidLoad() {
super.viewDidLoad()
delegateHandler.dissmissScene = { completion in
// error here
self.dismiss(animated: true, completion: completion)
}
}
func buttonAction(_ sender: UIButton) {
let controller = DetailViewController.instantiateFromStoryboard()
controller.delegate = delegateHandler
present(controller, sender: self)
}
}
对此我该怎么办?
答案 0 :(得分:0)
completion
闭包未转义。因为dismissScene
是一个接受非转义闭包的函数。请注意,dismissScene
的类型是Action
,它是(DismissComplete) -> Void
,而它又是(() -> Void) -> Void
。内部() -> Void
未标记为@escaping
。
您只需将其标记为:
typealias Action = (@escaping DismissComplete) -> Void