swift - UITableview 单元格值不会 swift 改变

Question

我有一个表格 View ，其中每个单元格包含两个按钮 + 和 - 以及一个在按钮值更改时更新值的标签

但是当我点击标签集 1 中的第一行添加按钮但是当我点击第二行时点击添加按钮然后标签值集 2 而不是 1

这是代码

    func btnAddAction(sender : UIButton)
{
    let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow: 0, inSection: sender.tag)) as! DetailTableViewCell
    k++
    cell.lblCount.text = "\(k)"

    if k * item_priceArr[sender.tag] >= 1000
    {
        lblCartCount.frame = CGRectMake(289, lblCartCount.frame.origin.y, 28, 15);
    }
    else if k * item_priceArr[sender.tag] >= 100 && j != 2
    {
        lblCartCount.frame = CGRectMake(291, lblCartCount.frame.origin.y, 22, 15);
        j = 2
    }
    else if k * item_priceArr[sender.tag] <= 99 && j != 1
    {
        lblCartCount.frame = CGRectMake(293, lblCartCount.frame.origin.y, 15, 15);
        j = 1
    }

    print("\(cou! + (k * item_priceArr[sender.tag]))")
    lblCartCount.text = "\(cou! + (k * item_priceArr[sender.tag]))"
}

func btnMinusAction(sender : UIButton)
{
    let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow: 0, inSection: sender.tag)) as! DetailTableViewCell
    k--
    if k * item_priceArr[sender.tag] >= 1000
    {
        lblCartCount.frame = CGRectMake(289, lblCartCount.frame.origin.y, 28, 15);
    }
    else if k * item_priceArr[sender.tag] >= 100 && j != 2
    {
        lblCartCount.frame = CGRectMake(291, lblCartCount.frame.origin.y, 22, 15);
        j = 2
    }
    else if k * item_priceArr[sender.tag] <= 99 && j != 1
    {
        lblCartCount.frame = CGRectMake(293, lblCartCount.frame.origin.y, 15, 15);
        j = 1
    }
    if  k >= 0
    {
     cell.lblCount.text = "\(k)"

     lblCartCount.text = "\(cou! + (k * item_priceArr[sender.tag]))"
     defaults.setInteger(Int(lblCartCount.text!)!, forKey: appDelegate.device_id)
     defaults.setInteger(k, forKey: "Device_Key")
    }
    else
    {
     k = 0
     JLToast.makeText("0").show()
    }
}

Answer 1

似乎变量 k 的作用域遍及整个 viewController。因此，当 k 在任何单元格中更新时，它的值对于 k 显示的所有单元格都会发生变化。每个单独的单元格都需要一个 k 变量。这可以通过在自定义单元格类中声明 var k = 0

来实现

DetailTableViewCell.swift

 class DetailTableViewCell : UITableViewCell {
       var k = 0 //Add this variable to the individual cell.


 }

TableViewController.swift

func btnAddAction(sender : UIButton)
{
    let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow: 0, inSection: sender.tag)) as! DetailTableViewCell
    cell.k++ //Now use cell.k to get increment/decrement for each individual cell.
}