Question

我在Signup控制器上设置了五个字段。用户名，显示名称，密码，确认密码和电子邮件地址。

它们设置如下：

static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    cell.textLabel.textColor = [UIColor colorWithRed:14.0f/255.0f green:62.0f/255.0f blue:178.0f/255.0f alpha:0.8f];
    cell.textLabel.font = [UIFont boldSystemFontOfSize:13.0f];


    switch ( indexPath.row ) {
        case 0: {
            cell.textLabel.text = NSLocalizedString(@"UsernameFieldLabel", @"Username field label");
            [cell addSubview:self.usernameField];
            break ;
        }
        case 1: {
            cell.textLabel.text = NSLocalizedString(@"DisplayNameFieldLabel", @"Displayname field lael");
            [cell addSubview:self.displayNameField];
            break ;
        }
        case 2: {
            cell.textLabel.text = NSLocalizedString(@"PasswordFieldLabel", @"Password field lael");
            [cell addSubview:self.passwordField];
            break ;
        }
        case 3: {
            cell.textLabel.text = NSLocalizedString(@"ConfirmPasswordFieldLabel", @"Confirm Password field lael");
            cell.textLabel.lineBreakMode = UILineBreakModeWordWrap;
            cell.textLabel.numberOfLines = 2;
            [cell addSubview:self.confirmPasswordField];
            break ;
        }
        case 4: {
            cell.textLabel.text = NSLocalizedString(@"EmailFieldLabel", @"Email field lael");
            [cell addSubview:self.emailField];
            break ;
        }
    }

    return cell;

细胞本身工作正常。然后我对一个检查有效电子邮件地址等的按钮进行了一些验证，这也可以正常工作。

我希望能够更新验证代码中的cell.textLabel.textColor属性。例如，如果电子邮件地址无效，我想将标签文本颜色更新为红色，以便它突出（我也对响应者进行排序等）。

如何在单元格设置之外获取对此特定单元格的引用？

修改这是答案后的变化。我需要访问第1节中的第5个cll（索引路径4）（表格视图中只有一个部分）：

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:4 inSection:1];

UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:indexPath];
cell.textLabel.textColor = [UIColor redColor];
[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];

Answer 1

你可以使用NSIndexPath获得UITableViewCell。

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:YOUR_ROW inSection:YOUR_SECTION];

UITableViewCell* cell = [yourTable cellForRowAtIndexPath:indexPath];
cell.textLabel.textColor = YOUR_COLOR;
[yourTable reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];

希望它对你有所帮助。

Answer 2

只需致电[self tableView:self.tableView cellForRowAtIndexPath:indexPath]即可。它将返回给定索引路径的单元格。

Answer 3

在UiTableView中访问自定义标签＆＃34; didselectRow＆＃34;

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
UILabel *label = (UILabel*)[cell viewWithTag:101]; // you can get label like
label.backgroundColor=[UIColor redColor];

从按钮

获取索引路径

- (void) cellEditAction:(UIButton *)sender {

  CGPoint buttonPosition = [sender convertPoint:CGPointZero toView:FriendsTable];
NSIndexPath *indexPath = [FriendsTable indexPathForRowAtPoint:buttonPosition];
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
UILabel *label = (UILabel*)[cell viewWithTag:101]; // you can get label like
label.backgroundColor=[UIColor redColor];

}

Answer 4

您可以使用代码创建。

in cellForRowAtIndexPath

static NSString *cellId = @"Cell";
CustomCell *cell = (CustomCell *)[self.tblView dequeueReusableCellWithIdentifier:cellId];
if (cell == nil) {
    NSArray * myNib;
    myNib =[[NSBundle mainBundle]loadNibNamed:@"CustomCell" owner:self options:nil];
    cell = (CustomCell *)[myNib lastObject];
}
[cell.deleteBtn addTarget:self action:@selector(cellDeleteAction:) forControlEvents:UIControlEventTouchUpInside];
cell.deleteBtn.tag = indexPath.row;
[cell.editBtn addTarget:self action:@selector(cellEditAction:) forControlEvents:UIControlEventTouchUpInside];
cell.editBtn.tag = indexPath.row;

之后你可以创建像这样的按钮动作方法，

- (void) cellEditAction:(UIButton *)sender {
UIButton *button = (UIButton *)sender;
NSString *rateId = [[resDict valueForKey:@"value"]objectAtIndex:button.tag];
}

Answer 5

更新了Swift，

let cell = tableView.cellForRow(at: indexPath) as! <Insert tableviewcell Controller here>

然后您可以像访问cellforrowat时一样访问单元格内的所有对象

let displayname = cell.labelfordisplayname.text!
print("This is the displayname -> \(displayname)")

访问cellForRowAtIndexPath之外的单元属性

5 个答案: