<view controller> 与协议 'UISearchBarDelegate' - Swift 的冗余一致性 4

Question

我有这个错误

Redundant conformance of 'TodoListViewController' to protocol 'UISearchBarDelegate'

错误在第 1 行 "UISearchBarDelegate" 上弹出。

extension TodoListViewController: UISearchBarDelegate {

func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {

    let request : NSFetchRequest<Item> = Item.fetchRequest()

    let predicate = NSPredicate(format: "title CONTAINS[cd] %@", searchBar.text!)

    request.predicate = predicate

    let sortDescriptor = NSSortDescriptor(key: "title", ascending: true)

    request.sortDescriptors = [sortDescriptor]

    do {
        itemArray = try context.fetch(request)
    } catch {
        print("Error fetching data from context \(error)")
    }

    tableView.reloadData()

  }
}

class TodoListViewController 声明：

class TodoListViewController: UITableViewController, UISearchBarDelegate {

我已经对此进行了研究，没有其他问题对我的错误有效。

Answer 1

您在分机处添加委托 extension TodoListViewController: UISearchBarDelegate {

并在申报时 class TodoListViewController: UITableViewController, UISearchBarDelegate {

从声明中删除它

class TodoListViewController: UITableViewController {

}

<view controller> 与协议 'UISearchBarDelegate' - Swift 的冗余一致性 4

Redundant conformance of <view controller> to protocol 'UISearchBarDelegate' - Swift 4

uisearchbardelegate

swift

swift-protocols