ios - 无法将类型 'to_do_list.AddItemViewController' (0x1009f3970) 的值转换为 'to_do_list.ListDetailViewController' (0x1009f3850)

Question

我创建了一个列表，其中我提供了一个用于编辑列表的详细信息披露按钮，但是当我点击这个按钮时它显示了一个错误

Could not cast value of type.

这是我的代码:

  override func tableView(tableView: UITableView, accessoryButtonTappedForRowWithIndexPath indexPath: NSIndexPath)
{

    let navigationController = storyboard!.instantiateViewControllerWithIdentifier("ListNavigationController") as! UINavigationController

    let controller = navigationController.topViewController as! ListDetailViewController

    controller.delegate = self

    let checklist = dataModel.lists[indexPath.row]

    controller.checklistToEdit = checklist

    presentViewController(navigationController, animated: true, completion: nil)

}

Answer 1

我分析了您的项目并建议您删除所有不需要的导航 Controller 并将此代码添加到您的 accessoryButtonTappedForRowWithIndexPath 方法中:

let VC = storyboard!.instantiateViewControllerWithIdentifier("ListNavigationController") as! ListDetailViewController

self.navigationController?.pushViewController(VC, animated: true)