获取带有复选标记的单元格标签 [英] Fetching the checkmarked cell's label

问题描述

我正在使用表格视图。我在第一次点击屏幕时添加了复选标记附件，并在第二次点击时删除了此复选标记。我在表视图的单元格上添加了几个ckeckmarks。现在我希望具有复选标记的单元格的标签应该显示在NSlog上。
请帮我解决这个问题。任何帮助都会非常有用。

I am working with the table view. I added the checkmark Accessory on the first tap of the screen and removed this checkmark on the second tap. I added few ckeckmarks on the cells of table view. Now i want that the labels of the cells having the checkmarks should be displayed on the NSlog. please help me out regarding this issue. Any help will be much appriciable.

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (tableView.tag == 0)
    {
        return [celltitles count];
    }
    else
    {
    return 7;
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }
    if (tableView.tag == 0)
    {
        cell.textLabel.text = [celltitles objectAtIndex:indexPath.row];

        if (indexPath.row == 0)
        {
            habitname = [[UITextField alloc]initWithFrame:CGRectMake(150, 0, 150, 50)];
            habitname.placeholder = @"Habit Name";
            habitname.delegate= self;
            [cell addSubview:habitname];
        }
                else if (indexPath.row == 1)
        {
            timelbl = [[UILabel alloc] initWithFrame:CGRectMake(100, 0, 220, 50)];
            timelbl.text = @"OFF";
            timelbl.textAlignment = NSTextAlignmentCenter;
            [cell addSubview:timelbl];

            timetitlelbl = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 50)];
            timetitlelbl.text = @"Alert";
            timetitlelbl.textAlignment = NSTextAlignmentCenter;
            [cell addSubview:timetitlelbl];

            toggleswitch = [[UISwitch alloc] initWithFrame:CGRectMake(250, 5, 50, 60)];
            toggleswitch.on = NO;
            [toggleswitch addTarget:self action:@selector(toggleSwitch) forControlEvents:(UIControlEventValueChanged | UIControlEventTouchDragInside)];
            [cell addSubview:toggleswitch];

        }
    }
    else if (tableView.tag == 1)
    {
        cell.textLabel.text = [daysarray objectAtIndex:indexPath.row];

    }

    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{
    if (indexPath.row == 1)
    {
        if (toggleswitch.on)
        {
            [self datepickershown:timelbl.text animated:YES];

            if (self.datePickerIsShowing)
            {
                //[self datepickershown];
                //[self hideDatePickerCell];
                [dscptxt resignFirstResponder];
            }
            else
            {
                [dscptxt resignFirstResponder];
                [self.timelbl resignFirstResponder];
                [self showDatePickerCell];
            }
        }
        else
        {
            timelbl.textColor = [UIColor grayColor];
        }

    }
    else if (indexPath.row > 2 && indexPath.row <10)
    {
        NSLog(@"I am Selectin the row");

        UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
        if (cell.accessoryType == UITableViewCellAccessoryNone)
        {
            cell.accessoryType = UITableViewCellAccessoryCheckmark;

        }
        else if (cell.accessoryType == UITableViewCellAccessoryCheckmark)
        {
           // NSLog(@"Selected Accessory Is %d",cell.accessoryType);
            cell.accessoryType = UITableViewCellAccessoryNone;
        }
    }

    [self.tableview deselectRowAtIndexPath:indexPath animated:YES];
}

- (void)savedata:(id)sender
{
}

以上是我正在使用的代码以及我想要日志的保存操作。

Above is the code which i am using and on the save action i want the log.

推荐答案

不要使用 UITableView 来存储数据。单元格被重复使用，因此不是检测您选择的项目的可靠方法。

Don't use the UITableView to store your data. Cells are reused, so that's not a reliable way to detect which items you have selected.

您可以存储是否在某个项目中选择了某个项目例如，数组。然后在 cellForRowAtIndexPath 中确定是否应显示复选标记。在 didSelectRowAtIndexPath 中，您更新模型（您的数组）并请求重新加载特定单元格。

You could store whether an item is selected in an array, for instance. Then in your cellForRowAtIndexPath determine if the checkmark should be displayed. In didSelectRowAtIndexPath you update the model (your array) and request a reload for the specific cell.

这将导致结果在更好的MVC分离中。

This will result in a better MVC separation.

编辑：为 UITableView 添加了<示例

// for this example we'll be storing NSIndexPath objects in our Model
// you might want to use a @property for this
NSMutableSet *model = [NSMutableSet set];


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    ...

    if([model containsObject:indexPath]) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    } 
    else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    }

    ... 
}


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

    ...

    // update the model
    if([model containsObject:indexPath]) {
        [model removeObject:indexPath];
    } 
    else {
        [model addObject:indexPath];
    }

    // request reload of selected cell
    [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation: UITableViewRowAnimationFade];

    ...

}

现在记录所有选定的项目应该相当容易，而不必使用 UITableView ：它现在就在你的模型中了！

Now it should be fairly easy to log all selected items, without having to use the UITableView: it's all in your model now!

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