在UITableView IOS中选择行时多个复选标记

问题描述

我有一个当选择显示复选标记的行.问题是，当我在didSelectRowAtIndexPath中选择一行并在选中的行上添加一个选中标记时，它会添加一个额外的选中标记.这是我的代码

I have a UITableView that displays checkmarks when a row is selected. The problem is that When i select a row in didSelectRowAtIndexPath and add a checkmark on the selected row it adds an additional checkmark. Here's my code

任何帮助将不胜感激.

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    // Configure the cell...

    cell.textLabel.text=[[Model.category objectAtIndex:indexPath.row] categoryName];

    cell.imageView.image=[[Model.category objectAtIndex:indexPath.row]categoryImage];

    //cell.detailTextLabel.text =@"Breve Descripción de la categoria";

    return cell;

}

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

    if ([self.tableView cellForRowAtIndexPath:indexPath].accessoryType == UITableViewCellAccessoryCheckmark) {

 [self.tableView cellForRowAtIndexPath:indexPath].accessoryType =UITableViewCellAccessoryNone;

 [self.cellSelected removeObject:indexPath];

    }else {

     [tableView cellForRowAtIndexPath:indexPath].accessoryType=UITableViewCellAccessoryCheckmark;

        [self.cellSelected addObject:indexPath];

    }

   [self checkMark];

   [tableView reloadData];
}

- (void)checkMark{

    for (NSIndexPath * indexPath in self.cellSelected) {

       [self.tableView cellForRowAtIndexPath:indexPath].accessoryType=UITableViewCellAccessoryCheckmark;

    }


}

在didSelectRowAtIndexPath中调用

推荐答案

[self.tableView cellForRowAtIndexPath:indexPath]不会返回确切的单元格.它可以是同一单元格，新单元格或重复使用的单元格.如果它是一个重复使用的单元格，在其辅助视图中带有复选标记，那么您最终将拥有两个带有复选标记的单元格.

[self.tableView cellForRowAtIndexPath:indexPath] call in the didSelectRowAtIndexPath will not return the exact cell. It can be same cell, new cell or reused cell. If it is a reused cell at its accessory view has a checkmark, you will end up having two cells with checkmark.

最好将其存储在数组中并相应地使用它.如果您打算有多个选择，请使用下面的代码示例.

Its better to store in the array and use it accordingly. If you are planning to have multiple selections, Use the code example below.

- (void)viewDidLoad
{
    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.
    self.cellSelected = [NSMutableArray array];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   //Cell Initialisation here

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

    }
    return cell;
}


 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    //if you want only one cell to be selected use a local NSIndexPath property instead of array. and use the code below
   //self.selectedIndexPath = indexPath;

    //the below code will allow multiple selection
    if ([self.cellSelected containsObject:indexPath])
    {
      [self.cellSelected removeObject:indexPath];
    }
    else
    {
       [self.cellSelected addObject:indexPath];
    }
    [tableView reloadData];
}

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