ios - 选择另一个表行时如何删除 UITableViewCellAccessoryCheckmark 的自定义图标

Question

我使用以下代码将自定义图标添加到 UITableViewCellAccessoryCheckmark。问题是当触摸/选择另一行时，单元格复选标记不会取消选择

这是我的代码:

 - (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

    int index = indexPath.row; id obj = [listOfItems objectAtIndex:index];


    //This toggles the checkmark
    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];


    if (cell.accessoryType == UITableViewCellAccessoryNone)
    {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;

        UIImage *image = [UIImage imageNamed:@"icon-tick.png"];

        UIButton *downloadButton = [UIButton buttonWithType:UIButtonTypeCustom];

        [downloadButton setImage:image forState:UIControlStateNormal];
        [downloadButton setFrame:CGRectMake(0, 0, 19, 19)];
        [downloadButton setBackgroundColor:[UIColor clearColor]];
        [self.tableView cellForRowAtIndexPath:indexPath].accessoryView = downloadButton;

        //This sets the array

    } else
    {
        cell.accessoryType = UITableViewCellAccessoryNone;

        UIButton *downloadButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [downloadButton setTitle:@"" forState:UIControlStateNormal];
        [downloadButton setFrame:CGRectMake(0, 0, 0, 0)];
        [self.tableView cellForRowAtIndexPath:indexPath].accessoryView = downloadButton;

    }

    NSMutableData *data = [NSMutableData data];
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    // Customize archiver here
    [archiver encodeObject:obj forKey:@"keyForYourArrayOfNSIndexPathObjects"];
    [archiver finishEncoding];
    [[NSUserDefaults standardUserDefaults] setObject:data forKey:@"keyForYourArrayOfNSIndexPathObjects"];


    NSKeyedUnarchiver *unarchiver;
    unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:
                  [[NSUserDefaults standardUserDefaults] objectForKey:@"keyForYourArrayOfNSIndexPathObjects"]];
    // Customize unarchiver here
    countryItemSelected = [unarchiver decodeObjectForKey:@"keyForYourArrayOfNSIndexPathObjects"];
    [unarchiver finishDecoding];

    NSLog(@"list of items %@", countryItemSelected);

    // Navigation logic may go here. Create and push another view controller.

     CitiesViewController *detailViewController = [[CitiesViewController alloc] init];
     // ...
     // Pass the selected object to the new view controller.
     [self.navigationController pushViewController:detailViewController animated:YES];

}

谢谢你的帮助

Answer 1

“复选标记不会取消选择”到底是什么意思？无论如何:您可以使用委托(delegate)方法 tableView:didDeselectRowAtIndexPath: 并在取消选择单元格时将附件更改为不同的东西。