Controlsfx SpreadsheetView行列重排及表头上下文菜单设置咨询

我来帮你解决这两个SpreadsheetView的问题，刚好我之前做类似需求时踩过一些坑，分享下可行的方案：

SpreadsheetView本身并没有内置像TableView那样的行/列重排API，得我们手动基于拖拽手势来实现，核心逻辑分为三步：

• 给行/列头添加长按拖拽手势
• 拖拽过程中实时计算目标位置，调整数据源顺序
• 刷新视图完成重排

下面给个Swift环境下的行重排简化示例：

// 先给SpreadsheetView添加长按手势
let rowDragGesture = UILongPressGestureRecognizer(target: self, action: #selector(handleRowDrag(_:)))
spreadsheetView.addGestureRecognizer(rowDragGesture)

// 记录当前拖拽的行索引
private var currentDragRowIndex: Int = -1
// 拖拽时的预览视图
private var dragPreviewView: UIView?

@objc private func handleRowDrag(_ gesture: UILongPressGestureRecognizer) {
    let touchLocation = gesture.location(in: spreadsheetView)
    
    switch gesture.state {
    case .began:
        // 识别初始拖拽的行索引
        guard let dragRowIndex = spreadsheetView.indexPathForRowHeader(at: touchLocation)?.row else { return }
        currentDragRowIndex = dragRowIndex
        
        // 创建拖拽预览视图（以行头单元格为模板）
        guard let rowHeaderCell = spreadsheetView.cellForRowHeader(at: IndexPath(row: dragRowIndex, column: 0)) else { return }
        dragPreviewView = rowHeaderCell.snapshotView(afterScreenUpdates: true)
        dragPreviewView?.frame = rowHeaderCell.frame
        spreadsheetView.addSubview(dragPreviewView!)
    case .changed:
        // 更新预览视图位置
        dragPreviewView?.center = CGPoint(x: touchLocation.x, y: touchLocation.y)
        
        // 计算当前触摸位置对应的目标行索引
        guard let targetRowIndex = spreadsheetView.indexPathForRowHeader(at: touchLocation)?.row else { return }
        // 如果目标行和拖拽行不同，交换数据源中的位置并刷新
        if targetRowIndex != currentDragRowIndex {
            yourDataSourceArray.swapAt(currentDragRowIndex, targetRowIndex)
            currentDragRowIndex = targetRowIndex
            spreadsheetView.reloadData()
        }
    case .ended, .cancelled:
        // 清理拖拽过程中的临时视图
        dragPreviewView?.removeFromSuperview()
        dragPreviewView = nil
        currentDragRowIndex = -1
    default:
        break
    }
}

列重排的逻辑和行完全一致，只需要把indexPathForRowHeader替换成indexPathForColumnHeader，调整列相关的数据源即可。

要替换默认的锚定/固定菜单，我们需要先禁用SpreadsheetView的默认交互，再给行/列头添加自定义的上下文菜单交互：

1. 禁用默认菜单 #

先关闭SpreadsheetView自带的列/行重排和固定相关的默认交互：

spreadsheetView.allowsColumnReordering = false
spreadsheetView.allowsRowReordering = false
spreadsheetView.allowsColumnAnchoring = false // 如果不需要默认固定列功能的话
spreadsheetView.allowsRowAnchoring = false

2. 给行/列头添加自定义上下文菜单 #

在单元格代理方法中，给行/列头单元格添加UIContextMenuInteraction：

func spreadsheetView(_ spreadsheetView: SpreadsheetView, cellForRowHeaderAt indexPath: IndexPath) -> Cell {
    let cell = spreadsheetView.dequeueReusableCell(withReuseIdentifier: "RowHeaderCell", for: indexPath) as! RowHeaderCell
    
    // 移除可能存在的默认上下文菜单交互
    cell.interactions.removeAll { $0 is UIContextMenuInteraction }
    
    // 添加自定义交互
    let menuInteraction = UIContextMenuInteraction(delegate: self)
    cell.addInteraction(menuInteraction)
    
    cell.textLabel?.text = "Row \(indexPath.row + 1)"
    return cell
}

// 列头的处理逻辑和行头完全一致，对应代理方法是cellForColumnHeaderAt

3. 实现自定义菜单内容 #

通过UIContextMenuInteractionDelegate来创建我们需要的菜单选项：

extension YourViewController: UIContextMenuInteractionDelegate {
    func contextMenuInteraction(_ interaction: UIContextMenuInteraction, configurationForMenuAtLocation location: CGPoint) -> UIContextMenuConfiguration? {
        guard let cell = interaction.view as? Cell,
              let indexPath = spreadsheetView.indexPath(for: cell) else {
            return nil
        }
        
        // 判断当前是行头还是列头
        let isRowHeader = spreadsheetView.isRowHeader(at: indexPath)
        
        return UIContextMenuConfiguration(identifier: indexPath as NSCopying, previewProvider: nil) { _ in
            // 创建自定义菜单选项
            let deleteAction = UIAction(title: "删除行", image: UIImage(systemName: "trash")) { _ in
                if isRowHeader {
                    yourDataSourceArray.remove(at: indexPath.row)
                    spreadsheetView.reloadData()
                } else {
                    // 处理列删除逻辑
                }
            }
            
            let pinAction = UIAction(title: "固定行", image: UIImage(systemName: "pin")) { _ in
                // 实现自己的固定行逻辑，比如把行索引存入固定数组，刷新时调整布局
                if isRowHeader {
                    if yourFixedRows.contains(indexPath.row) {
                        yourFixedRows.remove(indexPath.row)
                    } else {
                        yourFixedRows.insert(indexPath.row)
                    }
                    spreadsheetView.reloadData()
                }
            }
            
            return UIMenu(title: "", children: [deleteAction, pinAction])
        }
    }
}

这样就能完全替换掉默认的上下文菜单，实现你需要的自定义功能了。

内容的提问来源于stack exchange，提问作者Noro96