Swift 在快照中捕获整个tableview单元格范围以进行打印和共享

我试图快照整个scrollview，“scrollview”是一个tableview，它是一个电子表格视图吊舱。电子表格视图实际上是一个滚动视图/表格视图。我设置的方式是dequereusablecell。真的，我不知道还有什么别的办法，因为我对这一切都不熟悉。问题是，这会导致图像仅在保存的快照图像的一部分上渲染

如何捕获整个电子表格视图/表格视图

我搜索了又搜索，但没有任何结论性的方法可以让我理解或调整

共享功能：

// Share function for share button
@objc func shareTapped() {
    
    UIGraphicsBeginImageContext(spreadsheetView.contentSize)

    let savedContentOffset = spreadsheetView.contentOffset
    let savedFrame = spreadsheetView.frame

    spreadsheetView.contentOffset = CGPoint.zero
    spreadsheetView.frame = CGRect(x: 0, y: 0, width: spreadsheetView.contentSize.width, height: spreadsheetView.contentSize.height)

    spreadsheetView.layer.render(in: UIGraphicsGetCurrentContext()!)
    let image = UIGraphicsGetImageFromCurrentImageContext()

    spreadsheetView.contentOffset = savedContentOffset
    spreadsheetView.frame = savedFrame

    UIGraphicsEndImageContext()
    
    // Give sharing functionality
    let vc = UIActivityViewController(activityItems: [image!], applicationActivities: [])
    vc.excludedActivityTypes = [.assignToContact, .addToReadingList]
    vc.popoverPresentationController?.barButtonItem = navigationItem.rightBarButtonItem
    present(vc, animated: true)
    
}

电子表格视图设置：

// First initialize column and row headers & add grid data
func spreadsheetView(_ spreadsheetView: SpreadsheetView, cellForItemAt indexPath: IndexPath) -> Cell? {
    let cell = spreadsheetView.dequeueReusableCell(withReuseIdentifier: CellStyle.identifier, for: indexPath) as! CellStyle
    cell.printable(with: "0")
    cell.backgroundColor = .white
    if case 0 = indexPath.row {
        cell.printable(with: columnHeaders[indexPath.section])
        return cell
    } else if case 0 = indexPath.section {
        cell.printable(with: rowHeaders[indexPath.row])
        return cell
// Spreadsheet setup
func numberOfColumns(in spreadsheetView: SpreadsheetView) -> Int {
    columnHeaders.count }
func numberOfRows(in spreadsheetView: SpreadsheetView) -> Int {
    rowHeaders.count }
func spreadsheetView(_ spreadsheetView: SpreadsheetView, widthForColumn column: Int) -> CGFloat {
    if case 0 = column {
        return 90
    } else {
        return 60
    }
}
func spreadsheetView(_ spreadsheetView: SpreadsheetView, heightForRow row: Int) -> CGFloat {
    18  }
func frozenColumns(in spreadsheetView: SpreadsheetView) -> Int {
    1   }
func frozenRows(in spreadsheetView: SpreadsheetView) -> Int {
    1   }

编辑：这也不起作用：

UIGraphicsBeginImageContextWithOptions(spreadsheetView.contentSize, false, UIScreen.main.scale)

    for section in 0..<spreadsheetView.numberOfColumns {
        for row in 0..<spreadsheetView.numberOfRows {
            let indexPath = IndexPath(row: row, section: section)
            guard let cell = spreadsheetView.cellForItem(at: indexPath) else { continue }
            cell.contentView.drawHierarchy(in: cell.frame, afterScreenUpdates: true)
        }
    }
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

UIGraphicsBeginImageContextWithOptions（spreadsheetView.contentSize，false，UIScreen.main.scale）
对于0..中的部分，由于
UITableView
仅呈现可见的单元格，您可以尝试创建一个新的表视图，该视图的框架与其内容相同，以便所有单元格都可见，但我不确定这会对性能造成多大影响。您还可以在
ui视图中构建自己的“电子表格”，并对其进行快照。
我认为这超出了我的知识水平：(