Question

我有这个问题。使用UICollectionView和我的类“myCustomCell”，我插入了一个我必须更改的标签。当我使用该方法时：

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    NSString *CellIdentifier = @"Cell";
    CustomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];

    if (indexPath.section == 0) {
        cell.backgroundColor = [self colorForIndexToBlack:indexPath.item];
        UIColor *colorCell = cell.backgroundColor;
        NSString *strColorCell = [NSString stringWithFormat:@"%@", colorCell.hexStringValue];
        cell.lblCustomCell.text = [NSString stringWithFormat:@"HEX %@", strColorCell];
    } else {
        cell.backgroundColor = [self colorForIndexToWhite:indexPath.item];
        UIColor *colorCell = cell.backgroundColor;
        NSString *strColorCell = [NSString stringWithFormat:@"%@", colorCell.hexStringValue];
        cell.lblCustomCell.text = [NSString stringWithFormat:@"HEX %@", strColorCell];
    }

    return cell;
}

lblCustomCell （这是我要更改的标签）充满了我想要的信息，没关系。但是，当我使用此方法“void”来选择单个单元格并编辑标签的文本时不起作用，并且不会使用我的新文本更改标签。

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    NSString *CellIdentifier = @"Cell";
    CustomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];

    if (indexPath.section == 0) {
        cell.backgroundColor = [self colorForIndexToBlack:indexPath.item];
        UIColor *colorCell = cell.backgroundColor;
        NSString *strColorCell = [NSString stringWithFormat:@"%@", colorCell.hexStringValue];
        cell.lblCustomCell.text = strColorCell;
        NSLog(@"Indice della cella: %i %i %@", indexPath.item, indexPath.section * 2 + indexPath.row, strColorCell);
    } else {
        cell.backgroundColor = [self colorForIndexToWhite:indexPath.item];
        UIColor *colorCell = cell.backgroundColor;
        NSString *strColorCell = [NSString stringWithFormat:@"%@", colorCell.hexStringValue];
        cell.lblCustomCell.text = strColorCell;
        NSLog(@"Indice della cella: %i %i %@", indexPath.item, indexPath.section * 2 + indexPath.row, strColorCell);
    }
}

如何解决？

Answer 1

我现在看到，你没有在didSelectItemAtIndexPath方法中正确获取单元格。要获取单元格，请使用：

- (UICollectionViewCell *)cellForItemAtIndexPath:(NSIndexPath *)indexPath;

并改变你想要的任何东西，例如：

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
     CustomCell *cell = (CustomCell *)[collectionView cellForItemAtIndexPath:indexPath];
      if (indexPath.section == 0) {
         cell.backgroundColor = [self colorForIndexToBlack:indexPath.item];
         UIColor *colorCell = cell.backgroundColor;
         NSString *strColorCell = [NSString stringWithFormat:@"%@",     colorCell.hexStringValue];
        cell.lblCustomCell.text = strColorCell;
         NSLog(@"Indice della cella: %i %i %@", indexPath.item, indexPath.section * 2 + indexPath.row, strColorCell);
     } else {
         cell.backgroundColor = [self colorForIndexToWhite:indexPath.item];
         UIColor *colorCell = cell.backgroundColor;
         NSString *strColorCell = [NSString stringWithFormat:@"%@", colorCell.hexStringValue];
         cell.lblCustomCell.text = strColorCell;
         NSLog(@"Indice della cella: %i %i %@", indexPath.item, indexPath.section * 2 + indexPath.row, strColorCell);
     }
}

Answer 2

您只需要使用以前的方法获取您的单元格对象.-

CustomCell *cell = [self collectionView:collectionView cellForItemAtIndexPath:indexPath];

如何使用“void”didSelectItemAtIndexPath更改自定义单元格中的标签

2 个答案: