类型'_'的值没有成员

In the cb.check(self.rowChecked[indexPath.row]) line under cellForRowAt I'm getting a "Value of type 'LolFirstTableViewController' has no member 'rowChecked'" even though I set up rowChecked to be an array of Booleans with tasks.count number of items. Do I need to initialize rowChecked somewhere else besides cellForRowAt or what am I doing wrong here? The point of this code is to make a checkbox show up in each cell of a table where you can click it to change the accessory to a check mark, and click it again to uncheck it. The check box itself is a separate custom class called CheckButton. I'm still learning Swift so any help would be greatly appreciated! Thank you!

在cellForRowAt下的cb.check(self.rowChecked [indexPath.row])行中,我得到一个“类型值为'LolFirstTableViewController'没有成员'rowChecked'”,即使我将rowChecked设置为一个布尔数组tasks.count项目数。我是否需要在除了cellForRowAt之外的其他地方初始化rowChecked,或者我在这里做错了什么?此代码的要点是在表格的每个单元格中显示一个复选框,您可以在其中单击它以将附件更改为复选标记,然后再次单击它以取消选中它。复选框本身是一个名为CheckButton的独立自定义类。我还在学习Swift,所以任何帮助都会非常感激!谢谢!

import UIKit

class LoLFirstTableViewController: UITableViewController {

    var tasks:[Task] = taskData

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.rowHeight = UITableViewAutomaticDimension
        tableView.estimatedRowHeight = 60.0
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return tasks.count
    }

    @IBAction func cancelToLoLFirstTableViewController(_ segue:UIStoryboardSegue) {
    }

    @IBAction func saveAddTask(_ segue:UIStoryboardSegue) {
        if let AddTaskTableViewController = segue.source as? AddTaskTableViewController {

            if let task = AddTaskTableViewController.task {
                tasks.append(task)

                let indexPath = IndexPath(row: tasks.count-1, section: 0)
                tableView.insertRows(at: [indexPath], with: .automatic)
            }
        }
    }

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "TaskCell", for: indexPath) as! TaskCell

    let task = tasks[indexPath.row]
        cell.task = task

        var rowChecked: [Bool] = Array(repeating: false, count: tasks.count)

    if cell.accessoryView == nil {
                let cb = CheckButton()
                cb.addTarget(self, action: #selector(buttonTapped(_:forEvent:)), for: .touchUpInside)
                cell.accessoryView = cb
    }
            let cb = cell.accessoryView as! CheckButton
            cb.check(self.rowChecked[indexPath.row])

            return cell
    }

func buttonTapped(_ target:UIButton, forEvent event: UIEvent) {
            guard let touch = event.allTouches?.first else { return }
            let point = touch.location(in: self.tableView)
            let indexPath = self.tableView.indexPathForRow(at: point)
        var tappedItem = tasks[indexPath!.row] as Task
        tappedItem.completed = !tappedItem.completed
        tasks[indexPath!.row] = tappedItem
            tableView.reloadRows(at: [indexPath!], with: UITableViewRowAnimation.none)
    }

2 个解决方案

#1

You are declaring rowChecked as a local variable and calling it with self.rowChecked as if it were a class property.

您将rowChecked声明为局部变量并使用self.rowChecked调用它,就好像它是一个类属性一样。

To solve this issue, remove the self. before rowChecked.

要解决此问题,请删除self。在rowChecked之前。

Old:

cb.check(self.rowChecked[indexPath.row])

New:

cb.check(rowChecked[indexPath.row])

There might be further issues, but that's the reason for the error as your code currently stands.

可能还有其他问题,但这就是您的代码目前存在错误的原因。

#2

You have the line: var rowChecked: [Bool] = Array(repeating: false, count: tasks.count) inside the tableView:cellForRowAt method, so it's a local variable, it's not a property of the LolFirstTableViewController class.

你有一行:var rowChecked:[Bool] = tableView:cellForRowAt方法中的数组(重复:false,count:tasks.count),所以它是一个局部变量,它不是LolFirstTableViewController类的属性。

That means you need to change this line: cb.check(self.rowChecked[indexPath.row]) to cb.check(rowChecked[indexPath.row]) (Removed self.).

这意味着你需要更改这一行:cb.check(self.rowChecked [indexPath.row])到cb.check(rowChecked [indexPath.row])(删除自己。)。

#1