UITableViewCell checkmark change on select

问题:

Am I correct in thinking that to change the checkmark for "on" to "off", I must change the CellAccessoryType between none and checkmark on the didSelectRowAtIndexPath?

Because I have done this but I have noticed the behaviour is not perfectly identical to like the checkmark cells on the auto lock settings on the iphone.

Or is there some other way checkmarks are meant to be handled?

回答1:

1. Keep a property in your view controller called selectedRow, which represents the index of a row that represents the checked item in a table section.

2. In your view controller's -tableView:cellForRowAtIndexPath: delegate method, set the accessoryType of the cell to UITableViewCellAccessoryCheckmark if the cell's indexPath.row equals the selectedRow value. Otherwise, set it to UITableViewCellAccessoryNone.

3. In your view controller's -tableView:didSelectRowAtIndexPath: delegate method, set the selectedRow value to the indexPath.row that is selected, e.g.: self.selectedRow = indexPath.row

回答2:

Another solution:

-(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSIndexPath *oldIndex = [self.tableView indexPathForSelectedRow];
    [self.tableView cellForRowAtIndexPath:oldIndex].accessoryType = UITableViewCellAccessoryNone;
    [self.tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;
    return indexPath;
}

And yeah: you don't have to check if oldIndex is nil :)

---

Swift 3 and later:

override func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
    if let oldIndex = tableView.indexPathForSelectedRow {
        tableView.cellForRow(at: oldIndex)?.accessoryType = .none
    }
    tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark

    return indexPath
}

回答3:

Zyphrax suggested a great solution that worked great for me! And if you need to clear the previous selected row, just use:

[self.tableView reloadData]; 

in

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

回答4:

It should be

didHighlightRowAtIndexPath

instead of

tableView:didSelectRowAtIndexPath

回答5:

Alex answer worked for me only after adding reload table , in .h

{
  int selectedCell;
}
@property(nonatomic,readwrite)int selectedCell;

in .m *cellForRowAtIndexPath*

if(indexPath.row == selectedCell)
    {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        cell.selected = YES;
    }
    else
    {
        cell.accessoryType = UITableViewCellAccessoryNone;
        cell.selected = NO;
    }

and in anywhere didHighlightRowAtIndexPath or didSelectRowAtIndexPath

 self.selectedCell = indexPath.row;
    [self.tableView reloadData]; 

回答6:

swift:

var selectedCell:UITableViewCell?{
    willSet{
        selectedCell?.accessoryType = .None
        newValue?.accessoryType = .Checkmark
    }
}

then:

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    selectedCell = self.tableView.cellForRowAtIndexPath(indexPath)
    self.mapView.selectAnnotation(self.mapView.annotations[indexPath.row], animated: true)
}

回答7:

If you want to use your custom image as accessoryType use below code

-(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    UIImageView *imgCheckMark = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"select_icon.png"]];
    [imgCheckMark setFrame:CGRectMake(self.view.frame.size.width - 30, 25, 14, 18)];
    imgCheckMark.tag = 1000+indexPath.row;

    NSIndexPath *oldIndex = [self.tblSelectService indexPathForSelectedRow];
    [self.tblSelectService cellForRowAtIndexPath:oldIndex].accessoryView = UITableViewCellAccessoryNone;
    [self.tblSelectService cellForRowAtIndexPath:indexPath].accessoryView = imgCheckMark;
    return indexPath;
}

回答8:

For swift

  func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark
  }

  func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        tableView.cellForRow(at: indexPath)?.accessoryType = .none
  }