blocks|key|739633|text|由于UITableView中单元格的可重用性，在表本身被解除分配之前，实际上不会删除单元格。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|739634|我可能认为“删除”单元格是指从屏幕上消失的细胞。在这种情况下，UITableViewDelegate的以下函数可能会帮助您(当单元格不再可见时调用)：|739635|func+tableView(_+tableView:+UITableView,+didEndDisplaying+cell:+UITableViewCell,+forRowAt+indexPath:+IndexPath)|code-block|syntax|javascript|739636|entityMap^0|2|B|0|V|J|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

Due to the reusability of cells in <code>UITableView</code>, cells are not actually deleted until the table itself is deallocated.

I might assume that by 'deleting' cell you mean cell disappearing from the screen. In this case the following function of <code>UITableViewDelegate</code> might help you (called when the cell is not visible any more):

<pre><code>func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath)
</code></pre>

blocks|key|1850667|text|我能够通过子类UITableView类和重写func+deleteRows(at+indexPaths:+[IndexPath],+with+animation:+UITableView.RowAnimation)方法来解决这个问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1850668|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/documentation/uikit/uitableview/1614960-deleterows^0|7|B|M|2D|M|2D|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

I was able to solve this by subclassing the <code>UITableView</code> class and overriding the <a href="https://developer.apple.com/documentation/uikit/uitableview/1614960-deleterows" rel="nofollow noreferrer"><code>func deleteRows(at indexPaths: [IndexPath], with animation: UITableView.RowAnimation)</code></a> method.

blocks|key|1850690|text|你在评论中说：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1850691|所谓“删除”，是指当单元格从表视图中移除时，就像我们向左滑动单元格以删除它时一样。|blockquote|1850692|由于标记了RxSwift，解决方案是使用itemDeleted，如下所示：|offset|length|style|CODE|1850693|tableView.rx.itemDeleted
++++.subscribe(onNext:+{+print("delete+item+at+index+path+\($0)+from+your+model.")})
++++.disposed(by:+bag)|code-block|syntax|javascript|1850694|如果您不是在寻找Rx解决方案，那么您的问题是dup：|1850695|添加swipe以删除UITableViewCell|1850696|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/24103069/add-swipe-to-delete-uitableviewcell^0|0|0|K|B|0|0|0|0|P|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|12|8|@]|9|@]|A|$]]|$1|E|3|F|5|6|7|13|8|@$G|14|H|15|I|J]]|9|@]|A|$]]|$1|K|3|L|5|M|7|16|8|@]|9|@]|A|$N|O]]|$1|P|3|Q|5|6|7|17|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|18|8|@]|9|@$G|19|H|1A|1|1B]]|A|$]]|$1|T|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|10]]]]

In a comment you said:

<blockquote>
 By 'deleting', I mean when the cell is removed from the tableview like when we swipe the cell to the left to remove it.
</blockquote>

Since you tagged RxSwift, the solution is to use <code>itemDeleted</code> as in:

<pre><code>tableView.rx.itemDeleted
 .subscribe(onNext: { print("delete item at index path \($0) from your model.")})
 .disposed(by: bag)
</code></pre>

If you aren't looking for an Rx solution, then your question is a dup of:

<a href="https://stackoverflow.com/questions/24103069/add-swipe-to-delete-uitableviewcell">Add swipe to delete UITableViewCell</a>

blocks|key|2693463|text|您必须实现UITableView的一个委托方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2693464|trailingSwipeActionsConfigurationForRowAt|unordered-list-item|2693465|这很容易实现。此委托方法将被调用两次，一次是在滑动时调用，另一次是在按下删除行时调用。|2693466|`enter+code+here`
func+tableView(_+tableView:+UITableView,+trailingSwipeActionsConfigurationForRowAt+indexPath:+IndexPath)+->+UISwipeActionsConfiguration?+{
++++++++
++++++++let+config+=++UISwipeActionsConfiguration(actions:+[makeDeleteContextualAction(forRowAt:+indexPath)])
++++++++config.performsFirstActionWithFullSwipe+=+true
++++++++
++++++++return+config
++++}
++++
++++private+func+makeDeleteContextualAction(forRowAt+indexpath:IndexPath)+->+UIContextualAction+{
++++++++
++++++++let+deleteAction+=+UIContextualAction(style:+.destructive,+title:+LocalizableConstants.constLS_global_delete())+{+(action,+swipeButtonView,+completion)+in
++++
++++++++++++let+product+=+self.products[indexpath.row]
++++++++++++if+let+quantity+=+product.vo_quantity(),+let+amount+=+product.vo_priceFide()+{
++++++++++++++++self.totalProducts+-=+Int(truncating:+quantity)
++++++++++++++++self.totalAmount+-=+amount.doubleValue+*+quantity.doubleValue
++++++++++++}
++++++++++++
++++++++++++DispatchQueue.main.async+{
++++++++++++++++self.lbBasketNumber.text+=+String(self.totalProducts)
++++++++++++++++self.lbTotalAmount.text+=+String(self.totalAmount)
++++++++++++}
++++++++++++
++++++++++++self.products.remove(at:+indexpath.row)
++++++++++++self.tableView.deleteRows(at:+[indexpath],+with:+.fade)
++++++++++++
++++++++++++if+#available(iOS+13.0,+*)+{
++++++++++++++++action.image+=+ImagesConstants.constIMG_XCA_mini_icon_red_trash()
++++++++++++++++action.image?.withTintColor(ConstantsColor.const_COLOR_RED())
++++++++++++++++action.backgroundColor+=+ConstantsColor.const_COLOR_WHITE()
++++++++++++}+else+{
++++++++++++++++action.title+=+LocalizableConstants.constLS_global_delete()
++++++++++++}
++++++++++++
++++++++++++completion(true)
++++++++}
++++++++
++++++++return+deleteAction
++++}|code-block|syntax|javascript|2693467|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|O|8|@]|9|@]|A|$]]|$1|E|3|F|5|6|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|Q|8|@]|9|@]|A|$J|K]]|$1|L|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|M|$]]

You have to implement 1 delegate method of UITableView.
<ul>
<li>trailingSwipeActionsConfigurationForRowAt</li>
</ul>
It's easy to implement. This delegate method will be called twice, one when you swipe and again when you press to delete a row.
<pre><code>`enter code here`
func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -&gt; UISwipeActionsConfiguration? {
 
 let config = UISwipeActionsConfiguration(actions: [makeDeleteContextualAction(forRowAt: indexPath)])
 config.performsFirstActionWithFullSwipe = true
 
 return config
 }
 
 private func makeDeleteContextualAction(forRowAt indexpath:IndexPath) -&gt; UIContextualAction {
 
 let deleteAction = UIContextualAction(style: .destructive, title: LocalizableConstants.constLS_global_delete()) { (action, swipeButtonView, completion) in
 
 let product = self.products[indexpath.row]
 if let quantity = product.vo_quantity(), let amount = product.vo_priceFide() {
 self.totalProducts -= Int(truncating: quantity)
 self.totalAmount -= amount.doubleValue * quantity.doubleValue
 }
 
 DispatchQueue.main.async {
 self.lbBasketNumber.text = String(self.totalProducts)
 self.lbTotalAmount.text = String(self.totalAmount)
 }
 
 self.products.remove(at: indexpath.row)
 self.tableView.deleteRows(at: [indexpath], with: .fade)
 
 if #available(iOS 13.0, *) {
 action.image = ImagesConstants.constIMG_XCA_mini_icon_red_trash()
 action.image?.withTintColor(ConstantsColor.const_COLOR_RED())
 action.backgroundColor = ConstantsColor.const_COLOR_WHITE()
 } else {
 action.title = LocalizableConstants.constLS_global_delete()
 }
 
 completion(true)
 }
 
 return deleteAction
 }
</code></pre>

I am showing a <code>UITableView</code> which is driven by <a href="https://github.com/RxSwiftCommunity/RxRealmDataSources" rel="nofollow noreferrer">RxRealmDataSources</a>.

I need to perform some actions when a row in the table gets deleted.

Is there a way such that whenever a row gets deleted from the table, a function gets called with the indexpath of the deleted row?

Edit - 

The UI of a cell of the <code>UITableView</code> in my app depends on 2 things -

<ul>
<li>A data object that is fetched from the realm db ( <a href="https://github.com/RxSwiftCommunity/RxRealmDataSources#binding-to-a-table-view" rel="nofollow noreferrer">info</a> )</li>
<li>The index position of the row </li>
</ul>

Whenever, a cell gets deleted, I need to update the UI of its next cell.

If the only way the db ever got updated was by the direct action of the user, then I could have used <a href="https://developer.apple.com/documentation/uikit/uitableviewdatasource/1614871-tableview" rel="nofollow noreferrer"><code>func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath)</code></a> method to get the <code>indexPath</code> of the cell that should be deleted and update the UI of the next cell.

However, the db is synced to cloud and the db is binded to the table view so that I do not have control on when cells gets added or deleted. It is for this reason, I wanted to know if there is a way to know when a cell is removed from <code>UITableView</code>

Is there a way to know when a UITableViewCell is removed from UITableView?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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