UItableview滑动删除iOS 11不刷新/重新加载数据

Question

我对编程很陌生。下面的代码与swipe一起工作，删除一行，但在刷新后，所有行列表将返回。我有以下代码：

- (UISwipeActionsConfiguration *)tableView:(UITableView *)tableView trailingSwipeActionsConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath {
    UIContextualAction *delete = [UIContextualAction contextualActionWithStyle:UIContextualActionStyleDestructive
                                                                         title:@"DELETE"
                                                                       handler:^(UIContextualAction * _Nonnull action, __kindof UIView * _Nonnull sourceView, void (^ _Nonnull completionHandler)(BOOL)) {
                                                                           NSLog(@"index path of delete: %@", indexPath);
                                                                           completionHandler(YES);


                                                                       }];
     delete.backgroundColor = [UIColor  purpleColor]; //arbitrary color

    UISwipeActionsConfiguration *swipeActionConfig = [UISwipeActionsConfiguration configurationWithActions:@[delete]];
    swipeActionConfig.performsFirstActionWithFullSwipe = NO;

    return swipeActionConfig;

}

我使用的方法如下：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    FCell = (favouriteCell *)[tableView dequeueReusableCellWithIdentifier:@"favouriteCell"];
    FCell.selectionStyle=UITableViewCellSelectionStyleNone;
    if (FCell == nil)
    {
        FCell = [[[NSBundle mainBundle]loadNibNamed:@"favouriteCell" owner:nil options:nil] objectAtIndex:0];
    }

    FCell.nameLBL.text=[[favDetails objectAtIndex:indexPath.row] valueForKey:@"name"];
    FCell.poetLBL.text=[[favDetails objectAtIndex:indexPath.row] valueForKey:@"poet"];
    return FCell;

}

Answer 1

在记录删除索引路径的completionHandler中，需要从数据源(数组等)中删除该行。否则，当您的表从数据源重新加载时，它将重新出现。

您的trailingSwipeActionsConfigurationForRowAtIndexPath代码应该如下所示：

    - (UISwipeActionsConfiguration *)tableView:(UITableView *)tableView trailingSwipeActionsConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath {
        UIContextualAction *delete = [UIContextualAction contextualActionWithStyle:UIContextualActionStyleDestructive
                                                                             title:@"DELETE"
                                                                           handler:^(UIContextualAction * _Nonnull action, __kindof UIView * _Nonnull sourceView, void (^ _Nonnull completionHandler)(BOOL)) {
                                                                                NSLog(@"index path of delete: %@", indexPath);
[favDetails removeObjectAtIndex:indexPath.row];                                                  
completionHandler(YES);


                                                                           }];
         delete.backgroundColor = [UIColor  purpleColor]; //arbitrary color

        UISwipeActionsConfiguration *swipeActionConfig = [UISwipeActionsConfiguration configurationWithActions:@[delete]];
        swipeActionConfig.performsFirstActionWithFullSwipe = NO;

        return swipeActionConfig;

    }

这将从数据源中删除对象，因为从表中直观地删除了行。