Question

我已经阅读了很多关于我的问题，但我仍然无法指出确切的问题。我已经尝试了一些如果这里的代码在堆栈但我不断收到错误。下面的代码有效，但在滚动时消失了文本。

有什么想法吗？

GetQuestionsCustomCell.h：

@interface GetQuestionsCustomCell : UITableViewCell <UITextFieldDelegate>

@property (strong, nonatomic) IBOutlet UILabel *labelQuestion;
@property (strong, nonatomic) IBOutlet UITextField *textFieldAnswer;
@property (strong, nonatomic) IBOutlet UILabel *labelQuestionNumber;
- (IBAction)KeyDown:(id)sender;

@end

GetQuestionsCustomCell.m：

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Initialization code
        NSArray *nibArray = [[NSBundle mainBundle] loadNibNamed:@"GetQuestionsCustomCell" owner:self options:nil];
        self = [nibArray objectAtIndex:0];
        self.textFieldAnswer.delegate = self;
    }
    return self;
}

SecurityQuestions.m：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    GetQuestionsCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {
        cell = [[GetQuestionsCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }


    NSInteger nextIndexPathRow = indexPath.row;
    nextIndexPathRow++;
    cell.labelQuestion.text = [arrayOfQuestions objectAtIndex:indexPath.row];
    cell.labelQuestionNumber.text = [NSString stringWithFormat:@".%d", nextIndexPathRow];

    switch (indexPath.row) {
        case 0:
            tfA1 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 1:
            tfA2 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 2:
            tfA3 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 3:
            tfA4 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 4:
            tfA5 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 5:
            tfA6 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 6:
            tfA7 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 7:
            tfA8 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 8:
            tfA9 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 9:
            tfA10 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 10:
            tfA11 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 11:
            tfA12 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
    }

    return cell;
}

Answer 1

确切的问题是你既没有保存文本字段的值，也没有在cellForRowAtIndexPath上设置它们

当用户在文本字段中输入内容时，您需要将值追踪到某处，也可以在ViewController中以问号编号索引的数组中。一种方法是跟踪cellForRowAtIndexPath中的单元格：

cell.textFieldAnswer.tag = indexPath.row;
cell.textFieldAnswer.delegate = self;

然后你需要在viewcontroller中实现- (void)textFieldDidEndEditing:(UITextField *)textField。将值保存为：

[self.answers replaceObjectAtIndex:textField.tag withObject: textField.text];

然后，您需要在cellForRowAtIndexPath中再次将值设置为[cell.textFieldAnswer setText:[self.answers objectAtIndex:indexPath.row]]

原因是，如果您有1000个问题，iOS将不会创建1000个单元格。它将重用细胞。您需要更多地了解tableView：TableView Programming Guide

希望这有帮助。

Answer 2

更改CellForRowatIndexPath ...

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    GetQuestionsCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {
        cell = [[GetQuestionsCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;

    switch (indexPath.row) {
        case 0:
            tfA1 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 1:
            tfA2 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 2:
            tfA3 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 3:
            tfA4 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 4:
            tfA5 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 5:
            tfA6 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 6:
            tfA7 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 7:
            tfA8 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 8:
            tfA9 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 9:
            tfA10 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 10:
            tfA11 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
        case 11:
            tfA12 = (UITextField*)[cell.contentView viewWithTag:nextIndexPathRow];
            break;
    }


    NSInteger nextIndexPathRow = indexPath.row;
    nextIndexPathRow++;
    cell.labelQuestion.text = [arrayOfQuestions objectAtIndex:indexPath.row];
    cell.labelQuestionNumber.text = [NSString stringWithFormat:@".%d", nextIndexPathRow];

[tfA1 setText:[self.answers objectAtIndex:indexPath.row]];
[tfA2 setText:[self.answers objectAtIndex:indexPath.row]];
[tfA3 setText:[self.answers objectAtIndex:indexPath.row]];
[tfA4 setText:[self.answers objectAtIndex:indexPath.row]];
[tfA5 setText:[self.answers objectAtIndex:indexPath.row]];
[tfA6 setText:[self.answers objectAtIndex:indexPath.row]];
[tfA7 setText:[self.answers objectAtIndex:indexPath.row]];
  }
   return cell;
}

Answer 3

这是一个使用removeFlashCard(pos: number) { this.flashCards.removeAt(pos); }的简单解决方法，您可以在此方法中保存tableView delegate method的值，

UITextview.text

在自定义单元格（xib）中滚动时，UITextField中的文本消失

3 个答案: