在 didSelectRowAtIndexPath 时更改视图控制器

Posted 2023-03-04

【中文标题】在 didSelectRowAtIndexPath 时更改视图控制器

【英文标题】：Changing View Controller when didSelectRowAtIndexPath

【发布时间】：2016-07-11 20:10:39

【问题描述】：

我目前正在为 iPhone 开发一个错误处理服务应用程序的项目。在我的应用程序中，我有一个表格视图，当用户从 Adob​​e reader 或其他地方共享文档并重新打开应用程序时，系统会提示他们使用附件视图来说明他们希望如何附加文件。他们可以将文件添加到表视图上的现有项目或创建新工单。如果用户选择将附件添加到现有项目，他们必须选择该选项，然后单击表格中他们想要添加附件的单元格。单击单元格时，应将另一个视图控制器添加到当前视图子视图中。我不展示它的原因是因为我的标签栏不会显示在展示的视图上，因为它不是标签栏项目。但是，当我单击单元格以附加文件时，出现致命错误：索引超出范围

 func tableView(threadTableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 

    let topic = thread[indexPath.row]
    let selectedCell = threadTableView.cellForRowAtIndexPath(indexPath)

    if(importFileMode) 

        findChildrenOfParent(thread, childsIndex: indexPath.row)

        let replyView = self.storyboard?.instantiateViewControllerWithIdentifier("replyView")
        self.addChildViewController(replyView!)
        self.view.addSubview(replyView!.view)
        replyView!.didMoveToParentViewController(self)

    
    else 

        if(topic.canBeExpanded) 

            if(topic.isExpanded) 

                self.collapseCellsFromIndexOf(topic, indexPath: indexPath, threadTableView: threadTableView)
                selectedCell?.accessoryView = self.viewForDisclosureForState(false)

            
            else 

                self.expandCellsFromIndexOf(topic, indexPath: indexPath, threadTableView: threadTableView)
                selectedCell?.accessoryView = self.viewForDisclosureForState(true)


            
        
        else 

            // present the detailed view of entries
            selectedEntryIndex = 0

            findChildrenOfParent(thread, childsIndex: indexPath.row)

            let entryDetailView = self.storyboard?.instantiateViewControllerWithIdentifier("EntryDetailScene")

            self.addChildViewController(entryDetailView!)
            self.view.addSubview(entryDetailView!.view)
            entryDetailView!.didMoveToParentViewController(self)

        

    

错误恰好发生在

replyView!.didMoveToParentViewController(self)

奇怪的是，最后一个 else 语句中显示 entryDetailView 的代码运行良好。

这是我在加载时的回复 ViewController 并且确实出现了

override func viewDidLoad() 
    super.viewDidLoad()

    fileButtons = [attachmentButton1, attachmentButton2, attachmentButton3, attachmentButton4]

    self.entryTopicLabel.text? = topicTitle
    self.commentTextView.text? = entryList[selectedEntryIndex].etext!

    replyTextView.layer.borderColor = textViewBorderColor.CGColor
    replyTextView.layer.cornerRadius = 20
    replyTextView.layer.borderWidth = 0.5
    replyTextView.layer.masksToBounds = true
    replyTextView.spellCheckingType = UITextSpellCheckingType.Yes

    replyTextView.delegate = self

    self.cancel = UIBarButtonItem(title: "Cancel ", style: .Plain, target: self, action: #selector(cancelReply))

    self.cancel.tintColor = UIColor.whiteColor()
    self.cancel.setTitleTextAttributes([
        NSFontAttributeName: myFontNormal]
        , forState: UIControlState.Normal)

    self.navItems.rightBarButtonItem = self.cancel
    self.navigationBar.items = [navItems]

    attachmentButton1.hidden = true
    attachmentButton2.hidden = true
    attachmentButton3.hidden = true
    attachmentButton4.hidden = true



override func didReceiveMemoryWarning() 
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.


override func viewDidDisappear(animated: Bool) 

    filesToUpload.removeAll()



override func viewWillAppear(animated: Bool) 

    if(haveImportedFile) 

        attachImport()

    




func attachImport() 

    let defaults = NSUserDefaults(suiteName: userDefaultsGroup)
    let file = defaults?.objectForKey("file")

    if(filesToUpload.count < 5) 

        filesToUpload.append(file!)

    
    else 

        singleActionAlert(self, title: "Too Many Attachments", message: "You are only allowed a maximum of four file attachments.", action: "OK")

    

    defaults?.setObject(nil, forKey: "file")

我已经在这个问题上停留了几个小时，所以任何帮助都将不胜感激！ :) 顺便说一句，使用 xcode 7.3 和 swift 2.2

【问题讨论】：

另外，表格视图是自定义表格视图，因此单元格可以展开和折叠

【参考方案1】：

你忘了调用超类：super.viewWillAppear(animated) super.viewDidDisappear r(动画)

【参考方案2】：

我发现了问题，我没有在回复视图中更新用于我的主题数组的索引