ios - 'UILabel ?' does not have a member named ' 文本'

Question

这是我要创建的待办事项列表应用程序的代码:

import UIKit

class MyTableViewController: UITableViewController {

var ToDoItems = ["Buy Groceries", "Pickup Laundry", "Wash Car", "Return Library Books", "Complete Assignment"]

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cellIdentifier = "ToDoCell"
    let cell = tableView.dequeueReusableCellWithIdentifier("cellIdentifier", forIndexPath: indexPath) as UITableViewCell

    // Configure the cell...
    cell.textLabel.text = ToDoItems[indexPath.row] //This is where the issue is

    return cell
}

Answer 1

安全的方法是使用可选的绑定(bind):

if let label = cell.textLabel {
    label.text = ToDoItems[indexPath.row]
}

或者您可以使用可选链:

cell.textLabel?.text = ToDoItems[indexPath.row]