在 Swift 中选择 UITableViewController 中的第一行

问题描述

我试图在 UITableViewController 出现后选择第一行(通过 segue).

I am trying to select the first row in the UITableViewController once it appears (through a segue).

我正在使用从我之前的 Objective C 项目中继承的以下代码:

I am using the following code which I inherited from my previous Objective C project:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
    {
        let customCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! IGANavlistTableCustomViewCell

        // Code that sets the custom view cell

        // Then...
        // Selecting the first row by default
        if(indexPath.row == 0)
        {
            let rowToSelect:NSIndexPath = NSIndexPath(forRow: 0, inSection: 0)

            tableView.selectRowAtIndexPath(rowToSelect, animated: true, scrollPosition: UITableViewScrollPosition.None)

            tableView.delegate?.tableView!(tableView, didSelectRowAtIndexPath: rowToSelect)
        }

        return customCell;
    }

我收到以下错误:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[IGANavlistTableVC tableView:didSelectRowAtIndexPath:]: unrecognized selector sent to instance 0x79e21040'

如果有人能提供帮助，我将不胜感激.

I would appreciate if someone could help.

谢谢！

这是我的 didDeselectRowAtIndexPath 方法:

This is my didDeselectRowAtIndexPath method:

var navaidSelected = [String]()
var listOfNavPoints = [[String]]()

override func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath)
    {
        // The selected object of the Array with all navaids data (i.e., the selected navaid) is converted to a string
        self.navaidSelected = self.listOfNavPoints[indexPath.row]
    }

推荐答案

你忘记实现 func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 方法.

调用didSelectRowAtIndexPath时不需要使用delegate:

if(indexPath.row == 0)
        {
            let rowToSelect:NSIndexPath = NSIndexPath(forRow: 0, inSection: 0)

            tableView.selectRowAtIndexPath(rowToSelect, animated: true, scrollPosition: UITableViewScrollPosition.None)

           self.tableView(tableView, didSelectRowAtIndexPath: rowToSelect)
        }

=== 编辑 ===

将您的 didDeselectRowAtIndexPath 更改为 didSelectRowAtIndexPath.

这篇关于在 Swift 中选择 UITableViewController 中的第一行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！