ios - deselectRowAtIndexPath 什么都不做

Question

我一直在编写一个小型 Swift 应用程序。我现在正在使用 tableview 并尝试选择一行，更改图像并取消选择该行。

我的自定义 UITableViewCell 类如下所示:

class SelectFriendTableViewCell: UITableViewCell {

@IBOutlet weak var friendNameLabel: UILabel!

@IBOutlet weak var friendSelectedImage: UIImageView!

override func awakeFromNib() {
    super.awakeFromNib()

}

override func setSelected(selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
}

我的 TableViewController 有这些功能:

构建细胞:

//Build the cell
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("SelectFriend", forIndexPath: indexPath) as! SelectFriendTableViewCell

    //Default image is unselected
    cell.friendSelectedImage.image = UIImage(named: "unselected")
    //Get the label text
    cell.friendNameLabel.text = friendList[indexPath.row]

    return cell
}

选择单元格时执行操作(didSelectRowAtIndexPath)

 //Cell was selected
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let cell = tableView.dequeueReusableCellWithIdentifier("SelectFriend", forIndexPath: indexPath) as! SelectFriendTableViewCell

    //Check wheter the cell is or not selected
    if(cell.friendSelectedImage.image == UIImage(named: "unselected"))
    {
        //if it's unselected, select it and add the user to the invited list
        cell.friendSelectedImage.image = UIImage(named: "selected")
        //Add to the invited list, the label can't be null
        invitedList += [cell.friendNameLabel.text!]
    }

    else if(cell.friendSelectedImage.image == UIImage(named: "selected"))
    {
        //if it's selected, unselect it and remove the user from the invited list
        cell.friendSelectedImage.image = UIImage(named: "unselected")
        //Find the invited in the array and remove it
        for(var i=0; i < invitedList.count; i++)
        {
            if(invitedList[i] == cell.friendNameLabel.text!)
            {
                invitedList.removeAtIndex(i)
                break
            }
        }
    }
    else
    {
        print("error geting image")
    }

    //Trying to deselect the row, doesn't seem to be working
    tableView.deselectRowAtIndexPath(indexPath, animated: false)
}

我所看到的:

还有标签消失的问题。

Answer 1

dequeueReusableCellWithIdentifier 没有得到之前的cell，应该使用cellForRowAtIndexPath

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    //get the cell,
    let cell = tableView.cellForRowAtIndexPath(indexPath) as! SelectFriendTableViewCell
    //do some work
}