Question

这是错误...

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'attempt to delete row 4 from section 0 which only contains 0 rows before the update'

发生此错误的代码如下。

cell.imageView?.sd_setImage(with: fileUrl as URL?, placeholderImage: placeholderImage,
                                    options: [],
                                    progress: nil,
        completed: { (image, error, cacheType, imageURL) in

            guard let image = image else { return }
            //print("Image arrived!")
            cell.imageView?.image = self.resizeImage(image: image, newWidth: 50)

            let indexPath = NSIndexPath(row: self.usersArray.count-1, section: 0)

            self.tableview.reloadRows(at: [indexPath as IndexPath], with: .none)

            cell.isHidden = false

        })

当我删除这两行时，不会发生错误

let indexPath = NSIndexPath(row: self.usersArray.count-1, section: 0)

self.tableview.reloadRows(at: [indexPath as IndexPath], with: .none)

但是我需要在单元格中加载图像之后重新加载TableView。

如何解决？，希望您能为我提供帮助，非常感谢。

Answer 1

我认为这是ViewController中的一条鳕鱼。也许可以用

cell.imageView?.sd_setImage(with: fileUrl as URL?, placeholderImage: placeholderImage,
                                options: [],
                                progress: nil,
    completed: { [weak self] (image, error, cacheType, imageURL) in
        guard let 'self' = self else { return }
        guard let image = image else { return }
        //print("Image arrived!")
        cell.imageView?.image = self.resizeImage(image: image, newWidth: 50)

        DispatchQueue.main.async {
          let indexPath = IndexPath(row: self.usersArray.count-1, section: 0)

          self.tableview.reloadRows(at: [indexPath], with: .none)
        }
        cell.isHidden = false

    })

Answer 2

尝试使用开始更新开始更新特定单元格，并使用结束更新结束特定单元格，希望这可以解决您的问题：

__tableView.beginUpdates()
let rowToReload = IndexPath(row: usersArray.count - 1, section: 0)
__tableView.reloadRows(at: [rowsToReload], with: .none)
__tableView.endUpdates()

重新加载TableView时出错（更新前删除行）

2 个答案: