iphone - UITableView didSelectRowAtIndexPath 在点击时添加额外的复选标记

Question

当我在“didSelectRowAtIndexPath”中选择一个玩家并在所选行上添加复选标记时，它会添加一个额外的复选标记。

如果我点击 row = 0，它会在 row = 0 和 row = 11 上添加复选标记。这意味着只需点击一下即可标记两行。如果我点击 row = 1 ，它会在 row = 10 上添加一个额外的复选标记，因此它会向前添加 10 行复选标记。看起来它只是添加了复选标记，因为玩家没有进入实际的玩家列表。

任何帮助将不胜感激。

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

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

NSLog(@"indexPath: %i", indexPath.row);

// To many players selected
if (nrOfSelectedPlayers == 6) { //This is max players allowed
    UIAlertView *alertPlayer = [[UIAlertView alloc] initWithTitle:@"VARNING"
                                                          message:@"Du kan maximalt spela \n med sex spelare!" 
                                                         delegate:self 
                                                cancelButtonTitle:@"Tillbaka" 
                                                otherButtonTitles:nil];

    [alertPlayer show];
    [alertPlayer release];
    nrOfSelectedPlayers--;
    checkDeletePlayer = YES;
}
else { 

    // Handle the number of selected players to be able to delete player +6
    if (checkDeletePlayer == YES) {
        checkDeletePlayer = NO;
        nrOfSelectedPlayers++;
    }


    if (cell.accessoryType == UITableViewCellAccessoryNone) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        [selectedPlayersArray addObject:cell.textLabel.text];
        nrOfSelectedPlayers++;
    } 
    else {
        cell.accessoryType = UITableViewCellAccessoryNone;
        selectedPlayer = cell.textLabel.text;

        for (int oo = 0; oo < nrOfSelectedPlayers; oo++) {
            if ([selectedPlayersArray objectAtIndex:oo] == cell.textLabel.text) {
                [selectedPlayersArray removeObjectAtIndex:oo];
                nrOfSelectedPlayers--;
            }
        }
        //nrOfSelectedPlayers--;
    }
}
}

Answer 1

我正在使用带有动态原型(prototype)单元的 Storyboard来显示状态列表，在找到此解决方案之前我使用了上面的一些想法

第 1 步

@interface StateViewController : UITableViewController
{
    NSMutableArray *checkedIndexPaths;
}

步骤 2

(void)viewDidLoad
{
    [super viewDidLoad];
    self.states = [[GAIGStateStore sharedInstance]allStates];

    //Setup default array to keep track of the checkmarks
    checkedIndexPaths = [NSMutableArray arrayWithCapacity:self.states.count];
    for (int i = 0; i < self.states.count; i++) {
        [checkedIndexPaths addObject:[NSNumber numberWithBool:NO]];
    }
}

第3步

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

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

    if (cell.accessoryType == UITableViewCellAccessoryNone)
    {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        //This sets the array
        [checkedIndexPaths replaceObjectAtIndex:indexPath.row withObject:[NSNumber numberWithBool:YES]];

    } else
    {
        cell.accessoryType = UITableViewCellAccessoryNone;
         //This sets the array
        [checkedIndexPaths replaceObjectAtIndex:indexPath.row withObject:[NSNumber numberWithBool:NO]];

    }


}

第 4 步

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:stateCell forIndexPath:indexPath];

    UILabel *stateLabel = (UILabel *)[cell viewWithTag:1000];

    StateProvince *myState = [self.states objectAtIndex:indexPath.row];

    stateLabel.text = myState.label;

    //Now set the check marks
    // Assume cell not checked;
    [cell setAccessoryType:UITableViewCellAccessoryNone];

    NSNumber *num = [checkedIndexPaths objectAtIndex:indexPath.row];


    if (num == [NSNumber numberWithBool:YES]) {
           [cell setAccessoryType:UITableViewCellAccessoryCheckmark];
    }


    return cell;
}