Question

我的cellForRow方法中有以下崩溃报告。

这不是我在xCode中运行时可以重现的东西。

viewWillDisappear

我读到有问题的错误与NSNotificationCenter相关联，我需要删除override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) NotificationCenter.default.addObserver(self, selector:#selector(checkTimeout), name: NSNotification.Name(rawValue: "appOpened"), object: nil) } deinit { NotificationCenter.default.removeObserver(self) } override func viewDidDisappear(_ animated: Bool) { super.viewDidDisappear(animated); NotificationCenter.default.removeObserver(self) } override func viewWillDisappear(_ animated: Bool) { //should I add NotificationCenter.default.removeObserver(self) here and remove it from the other two places above? if let answers = Helper_EQI_Answer.getAnswers(inspectionID) { inspection?.answers = answers; } }中的观察者。

我已经在deinit和viewDidDisappear中删除了我的观察者。如果我将观察者的删除添加到viewWillDisappear中，这应该解决我的问题吗？

此外，如果我将观察者删除添加到viewWillDisappear，我应该在deinit和viewDidDisappear中删除此代码吗？

上一个代码：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        if let item: = insp_Questions?[indexPath.row]{

            if 1...12 ~= item.type && answerIDs != nil
            {
                switch (EQI_QuestionType(rawValue: item.type)!)
                {
                case .true_false:
                    if let cell = tableView.dequeueReusableCell(withIdentifier: "IQ_FlipCell") as? IQ_FlipCell
                    {
                        cell.table = questionTable;
                        cell.delegate = self;
                        cell.qID = answerIDs![indexPath.row];
                        cell.selectionStyle = .none
                        //this empty line is 610
                        if questionNA[indexPath.row]
                        {
                            cell.NABox.setImage(#imageLiteral(resourceName: "checkbox_selected"), for: .normal);
                            cell.questionItem.isHidden = true;
                        } else {
                            cell.NABox.setImage(#imageLiteral(resourceName: "checkbox_up"), for: .normal);
                            cell.questionItem.isHidden = false;
                        }

                        let cell2 = cell.formatCell(with: item, for: cell, at: indexPath, qtype: 0)
                        textHeight[indexPath.row] = cell.questionText.numberOfVisibleLines;
                        if item.question.characters.count > 40
                        {
                            textHeight[indexPath.row] += 1
                        }
                        return cell2;
                    }
                }
            }
         }
    return UITableViewCell();
}

CellForRow片段：我包含了指向第610行的switch语句的情况.EQI_Question类型是枚举。所有案例都在开关中得到满足

<?php  if (!empty($this->product->customfieldsSorted['youtube'])) {
        $this->position = 'youtube';
        echo '<button class="shop_tablinks tab2"  onclick="openSpecs(event, \'Specs3\')">';
        echo JText::_('Video'); 
       echo '</button>';
   } // Product Custom ontop end
    ?>

在cellForRow中崩溃：__ CRLUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION

0 个答案: