Question

所以，UICollectionView现在对我来说真是痛苦。考虑我有一个UIViewController，其中嵌入了一个UICollectionView。好吧，CollectionView的每个单元几乎都是UIViewController的整个宽度。每个单元包含一些按钮和图像。当我选择一个按钮并倾向于使按钮保持其状态时，CollectionView会重用该单元格，并且也会在其他单元格之间重复该单元格状态。但是，当我尝试将单元格放入数组中并且想要检查该数组中单元格的状态时，cellForItemAt方法将覆盖这些单元格。我感到很困惑。请帮忙。即使prepareForReuse中的UICollectionViewCell也无济于事。这是一些代码：

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! AddressCollectionViewCell
    cell.shopAddressDetailLbl.text = ""
    cell.addressObj = addresses[indexPath.row]
    cell.configureCellForAddress(cell.addressObj)
    cell.cellTag = indexPath.row
    cell.cellDelegate = self
    if addressCells.contains(cell) == false {
        addressCells.append(cell)
    } else {
        if cell.isAddressConfirmed == true {
            cell.confirmAddress.setTitle("CONFIRMED", for: .normal)
            cell.confirmAddress.isEnabled = false
            cell.confirmAddress.backgroundColor
                = UIColor(red: 0, green: 100/255, blue: 0, alpha: 1)
            addressCells[indexPath.row] = cell
        }
    }
    return cell
}

extension AddressesCollectionViewController: AddressCollectionViewCellDelegate {
    func confirmBtnPressed(confirmAddressObj: Address, cell:AddressCollectionViewCell) {
        for cellTemp in addressCells {
            if cellTemp == cell && cellTemp.isAddressConfirmed == false {
                if let dele = addressCollectionViewDelegate {
                    cellTemp.isAddressConfirmed = true
                    dele.configureCellsAccordingToChanges(cell: cellTemp)
                }
            }
        }
    }
}

override func prepareForReuse() {
    super.prepareForReuse()

    cellTag = 0
    confirmAddress.setTitle("Confirm Address", for: .normal)
    confirmAddress.backgroundColor = APP_UNIVERSAL_COLOR
    confirmAddress.isEnabled = true
}

任何帮助都倍受赞赏。

Answer 1

@ Vadian，@ Abu Ul Hassan

非常漂亮！对于在这方面需要帮助的其他人。 Vadian在评论中建议我只需要更新和监视模型，这就是我所做的。这样就可以了：

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! AddressCollectionViewCell
    cell.shopAddressDetailLbl.text = ""
    cell.addressObj = addresses[indexPath.row]
    cell.configureCellForAddress(cell.addressObj)
    cell.cellTag = indexPath.row
    cell.cellDelegate = self

    if addresses[indexPath.row].isConfirmed! == true {
        cell.confirmAddress.setTitle("CONFIRMED", for: .normal)
        cell.confirmAddress.isEnabled = false
        cell.confirmAddress.backgroundColor = UIColor(red: 0, green: 100/255, blue: 0, alpha: 1)
    } else {
        cell.confirmAddress.setTitle("Confirm Address", for: .normal)
        cell.confirmAddress.isEnabled = true
        cell.confirmAddress.backgroundColor = APP_UNIVERSAL_COLOR
    }
    return cell
}

extension AddressesCollectionViewController: AddressCollectionViewCellDelegate {
    func confirmBtnPressed(confirmAddressObj: Address, cell:AddressCollectionViewCell) {
        if confirmAddressObj.isConfirmed! == false {
            if let dele = addressCollectionViewDelegate {
                cell.isAddressConfirmed = true
                dele.configureCellsAccordingToChanges(cell: cell)
            }
        }
    }
}

及其活着的：D

UICollectionView |可重复使用的单元格

1 个答案: