自定义editingAccessoryView无法正常工作

时间:2011-09-03 20:56:17

标签: ios uitableview uikit

我有一个带有自定义单元格的UITableView的以下代码:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"FolderCellViewController"];
    if (cell == nil) {
        // Load the top-level objects from the custom cell XIB.
        NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"FolderCellViewController" owner:self options:nil];
        // Grab a pointer to the first object (presumably the custom cell, as that's all the XIB should contain).
        cell = [topLevelObjects objectAtIndex:0];
        cell.editingAccessoryView=accessoryView; //accessoryView is a UIView within a UITableViewCell, and it is properly connected in IB
        cell.selectionStyle = UITableViewCellSelectionStyleNone;

    }
    return cell;
}


// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the specified item to be editable.
    return NO; //YES here makes a red delete button appear when I swipe
}


// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        // [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }   
    else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }   
}

但是对于某些人,当我刷卡时没有任何反应。我没有做过任何事情,除了这个 - 我还需要做些什么来实现这个目标吗?

编辑:显然我所做的只是设置整个表处于编辑模式时的编辑样式,而不是当我在每个单独的单元格上滑动时。所以我想要做的是当我在每个单元格上滑动时,为该单元格显示自定义accessoryView。但我不知道该怎么做..

1 个答案:

答案 0 :(得分:10)

当单元格进入编辑模式时,将显示编辑附件视图。实际上看起来有点太难了,但我已经设法了:

为了在进入整个表的编辑模式时以及在滑动单个行时都显示这一点,我在UITableViewController子类中实现了以下内容:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated {

    if (editing)
        self.editingFromEditButton = YES;
    [super setEditing:(BOOL)editing animated:(BOOL)animated];
    self.editingFromEditButton = NO;
    // Other code you may want at this point...
}

editingFromEditButton是子类的BOOL属性。按下标准“编辑”按钮时调用此方法。它用于以下方法,该方法阻止标准删除按钮显示:

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (self.editingFromEditButton)
        return UITableViewCellEditingStyleNone;

    // Otherwise, we are at swipe to delete
    [[tableView cellForRowAtIndexPath:indexPath] setEditing:YES animated:YES];
    return UITableViewCellEditingStyleNone;
} 

如果整个表格视图被设置为编辑模式,那么每个单元格也将被发送setEditing消息。如果我们刷了一行,那么我们需要强制该单元进入编辑模式,然后返回UITableViewCellEditingStyleNone样式以防止出现标准删除按钮。

然后,要关闭自定义编辑附件,您还需要以下代码:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{
    // Cancel the delete button if we are in swipe to edit mode
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    if (cell.editing && !self.editing)
    {
        [cell setEditing:NO animated:YES];
        return;
    }

    // Your standard code for when the row really is selected...
}