ios - 如何通过拖放 UITableview Cell Swift 启用前导和尾随滑动

Question

我正在尝试启用 Leading 和 Trailing 使用长按 tableview 单元格滑动到 drag 和 drop 选项使用 Swift。在这里，我使用下面的代码我可以拖放它但不能长按也不能同时启用前导和尾随 swipe。应用启动时需要默认启用三项功能。

TableView 委托(delegate)

override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        let deleteAction = UIContextualAction(style: .normal, title:  "Delete", handler: { (ac:UIContextualAction, view:UIView, success:(Bool) -> Void) in
            print("OK, marked as Delete")
            success(true)
        })
        deleteAction.backgroundColor = .orange
        return UISwipeActionsConfiguration(actions: [deleteAction])
    }

    override func tableView(_ tableView: UITableView,trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        let modifyAction = UIContextualAction(style: .normal, title:  "Edit", handler: { (ac:UIContextualAction, view:UIView, success:(Bool) -> Void) in
            print("Update action ...")
            self.showaddMilestone()
            success(true)
        })
        modifyAction.image = UIImage(named: "edit")
        modifyAction.backgroundColor = .red
        return UISwipeActionsConfiguration(actions: [modifyAction])
    }

 override func tableView(_ tableView: UITableView, shouldIndentWhileEditingRowAt indexPath: IndexPath) -> Bool {
        return false
    }

    override func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
        let movedObject = self.milestoneTitles[sourceIndexPath.row]
        milestoneTitles.remove(at: sourceIndexPath.row)
        milestoneTitles.insert(movedObject, at: destinationIndexPath.row)
        debugPrint("\(sourceIndexPath.row) => \(destinationIndexPath.row)")
        // To check for correctness enable: self.tableView.reloadData()
    }

Answer 1

你可以通过以下方式做到这一点......

func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
    return true
}

@available(iOS 11.0, *)
func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {

    //EDIT
    let actionEDIT =  UIContextualAction(style: .normal, title: "", handler: { (action,view,completionHandler ) in
        //do stuff
        completionHandler(true)
    })
    actionEDIT.image = UIImage(named: "icn_edit")
    actionEDIT.backgroundColor = UIColor.UIColorFromHex(hex: "F7F7F7")

    //PDF
    let actionPDF =  UIContextualAction(style: .normal, title: "", handler: { (action,view,completionHandler ) in
        //do stuff
        completionHandler(true)
    })
    actionPDF.image = UIImage(named: "icn_pdf")
    actionPDF.backgroundColor = UIColor.UIColorFromHex(hex: "F7F7F7")

    //SHARE
    let actionSHARE =  UIContextualAction(style: .normal, title: "", handler: { (action,view,completionHandler ) in
        //do stuff
        completionHandler(true)
    })
    actionSHARE.image = UIImage(named: "icn_shareGreen")
    actionSHARE.backgroundColor = UIColor.UIColorFromHex(hex: "F7F7F7")

    let configuration = UISwipeActionsConfiguration(actions: [actionSHARE,actionPDF,actionEDIT])

    return configuration
}

//leftAction 前导

func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
    let leftAction = UIContextualAction(style: .normal, title:  "Edit", handler: { (ac:UIContextualAction, view:UIView, success:(Bool) -> Void) in
        print("leftAction tapped")
        success(true)
    })

    leftAction.image = UIImage(named: "")
    leftAction.backgroundColor = UIColor.red

    return UISwipeActionsConfiguration(actions: [leftAction])
}