Swift 3 – 支持“刷卡删除”的iOS 10 UITableView

更新的答案：

只需将FUITableViewDataSource子类化为实现自定义UITableViewDataSource功能,然后将子类绑定到UITableView.

FUITableViewDataSource子类：

import UIKit
import FirebaseDatabaseUI

class EditableTableDataSource: FUITableViewDataSource {

    /// Called to populate each cell in the UITableView.
    typealias PopulateCellBlock = (UITableView,FIRDataSnapshot) -> UITableViewCell

    /// Called to commit an edit to the UITableView.
    typealias CommitEditBlock = (UITableView,UITableViewCellEditingStyle,IndexPath) -> Void

    private let commitEditBlock: CommitEditBlock?

    /// A wrapper around FUITableViewDataSource.init(query:view tableView:populateCell:),with the
    /// addition of a CommitEditBlock.
    public init(query: FIRDatabaseQuery,populateCell: @escaping PopulateCellBlock,commitEdit: @escaping CommitEditBlock)
    {
        commitEditBlock = commitEdit
        super.init(collection: FUIArray.init(query: query),populateCell: populateCell)
    }

    override func tableView(_ tableView: UITableView,forRowAt indexPath: IndexPath)
    {
        if (commitEditBlock != nil) {
            commitEditBlock!(tableView,editingStyle,indexPath)
        }
    }

}

extension UITableView {

    /// Creates a data source,binds it to the table view,and returns it. Note that this is the
    /// `EditableTableViewDataSource` equivalent of the 
    /// `FUITableViewDataSource.bind(to:populateCell:)` method.
    ///
    /// - parameters:
    ///   - to:             The Firebase query to bind to.
    ///   - populateCell:   A closure that's called to populate each cell.
    ///   - commitEdit:     A closure that's called when the user commits some kind of edit. Maps to
    ///                     `tableView(:commit:forRowAt:)`.
    func bind(to query: FIRDatabaseQuery,populateCell: @escaping EditableTableDataSource.PopulateCellBlock,commitEdit: @escaping EditableTableDataSource.CommitEditBlock)
        -> EditableTableDataSource
    {
        let dataSource = EditableTableDataSource(query: query,populateCell: populateCell,commitEdit: commitEdit)
        dataSource.bind(to: self)
        return dataSource
    }

}

用法：

import UIKit
import FirebaseDatabaseUI

class ScheduleViewController: UITableViewController {

    private let TAG = String(describing: ScheduleViewController.self)

    private var dataSource: FUITableViewDataSource!
    private var dataManager: DataManager!

    override func viewDidLoad() {
        super.viewDidLoad()

        dataManager = AppManager.defaultInstance.dataManager()

        dataSource = tableView.bind(
            to: dataManager.scheduledHabitsQuery(),populateCell: populateCellBlock(),commitEdit: commitEditBlock())
    }


    // MARK: TableView Data Source

    func populateCellBlock() -> EditableTableDataSource.PopulateCellBlock {
        return { tableView,snapshot in
            let cell = ScheduledHabitTableViewCell.from(tableView: tableView,at: indexPath)
            cell.set(habit: ScheduledHabit(fromSnapshot: snapshot))
            return cell
        }
    }

    func commitEditBlock() -> EditableTableDataSource.CommitEditBlock {
        return { tableView,indexPath in
            if (editingStyle != .delete) {
                return
            }

            // Delete the data from Firebase.
            let snapshot = self.dataSource.snapshot(at: indexPath.row)
            self.dataManager.moveToTrash(ScheduledHabit(fromSnapshot: snapshot))

            // Deleting the table view row is done automatically by the FirebaseUI data source.
        }
    }


    // MARK: - Navigation

    override func prepare(for segue: UIStoryboardSegue,sender: Any?) {
    }

}

原始答案：

解决方案是子类化FUITableViewDataSource并覆盖您想要的UITableViewDataSource方法.之后一切都很完美.

import UIKit
import FirebaseDatabaseUI

class FUIEditableTableViewDataSource: FUITableViewDataSource {

    /// Called to populate each cell in the UITableView.
    typealias PopulateCellBlock = (UITableView,tableView: UITableView,commitEdit: @escaping CommitEditBlock)
    {
        commitEditBlock = commitEdit
        super.init(query: query,view: tableView,indexPath)
        }
    }

}