Ios 如何在customcell中使用"；“无效”；didSelectItemAtIndexPath

我有这个问题。将UICollectionView与我的类“myCustomCell”一起使用，我在其中插入了必须更改的标签。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）已填充了我想要的信息，并且没有问题。但是，当我使用此方法“void”选择单个单元格并编辑标签文本时，标签不起作用，也不会用新文本更改标签

- (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);
    }
}

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如何修复？

我现在明白了，您在

didSelectItemAtIndexPath

方法中没有正确获取单元格。 要获取单元格，请使用以下命令：

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

并更改您想要的任何内容，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);
     }
}

---

您只需要使用前面的方法获取单元对象-

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

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使用void是什么意思？使用此方法时，您应该使用didSelectItemAtIndexPath“void”，如下：-（void）CollectionView:（UICollectionView*）CollectionView didSelectItemAtIndexPath:（NSIndexPath*）InExpath我缺少一些东西。。。我不知道要更改什么，在哪里更改，我不工作…我正在尝试，但说：不兼容的指针类型初始化“CustomCell*”和类型为“UICollectionViewCell*”的表达式我忘记添加第一行的强制转换，请参阅我的编辑：CustomCell*cell=（CustomCell*）[collectionView cellForItemAtIndexPath:indexPath]；好的，清楚了，完成了。但是你只能接受一个答案，对吗？