UITableView 的 indexPathsForVisibleRows 更新除一个单元格之外的所有单元格

Question

我有一个 UITableView，它使用 NSFetchedResultsController 填充它的单元格。我还使用 indexPathsForVisibleRows 来更新可见单元格，但我点击和编辑的单元格除外。但是 UI 使用正确的计算更新所有单元格，除了一个。如果我滚动该 tableView，那么该单元格会在下次可见时重新计算。

有问题的GIF：CLICK

我定义了要编辑的单元格，并为除我正在编辑的单元格之外的所有单元格重新加载行：

    func textFieldDidChangeSelection(_ textField: UITextField) {
    let tapLocation = textField.convert(textField.bounds.origin, to: tableView)
    guard let indexPath = tableView.indexPathForRow(at: tapLocation) else { return }
    pickedCurrency = fetchedResultsController.object(at: indexPath)
    
    let visibleIndexPath = tableView.indexPathsForVisibleRows ?? []
    var nonActiveIndexPaths = [IndexPath]()
    
    for index in visibleIndexPath where index != indexPath {
        nonActiveIndexPaths.append(index)
    }
    
    tableView.reloadRows(at: nonActiveIndexPaths, with: .none)
}

为什么 UI 更新除一个单元格之外的所有单元格？找不到原因...

Answer 1

以下是我设法解决问题的方法。我理解的是，我应该避免在我的案例中使用 tableView.indexPathsForVisibleRows，因为正如@ShawnFrank 所说，它只会重新加载可见的单元格：

func textFieldDidChangeSelection(_ textField: UITextField) {

     //Code for defining an active cell (on which I clicked to edit its textField)
    let tapLocation = textField.convert(textField.bounds.origin, to: tableView)
    guard let pickedCurrencyIndexPath = tableView.indexPathForRow(at: tapLocation) else { return }
    pickedCurrency = fetchedResultsController.object(at: pickedCurrencyIndexPath)
    
    //Array for all IndexPaths which is not selected, i.e. not active
    var nonActiveIndexPaths = [IndexPath]()
    
    //Define all rows tableView has at the moment for particular section 
    //In my case it can be only 1 section which starts at 0 index
    let tableViewRows = tableView.numberOfRows(inSection: 0)
    for i in 0..<tableViewRows {
    //Create indexPath with the rows and section
        let indexPath = IndexPath(row: i, section: 0)
    //Add all IndexPaths to previously created array, except the one that is active now
        if indexPath != pickedCurrencyIndexPath {
            nonActiveIndexPaths.append(indexPath)
        }
    }
    //Reload only rows from the array
    tableView.reloadRows(at: nonActiveIndexPaths, with: .none)
}

UITableView 的 indexPathsForVisibleRows 更新除一个单元格之外的所有单元格

UITableView's indexPathsForVisibleRows updates all cells except one

swift

uitableview

uikit

tableview

nsfetchedresultscontroller