如何单击按钮并更改 tablewviewcell 中的标签文本
我想在每个 TableViewCell 中单击按钮时更改标签文本
I want to change label text when i was click button in every TableViewCell
我的意思是有 2(-,+) 个按钮和 1 个标签,当我点击按钮时,标签会增加或减少.
I mean have 2(-,+) button and 1 label, When I click on the button, the label will increase or decrease.
我不知道怎么做?
你需要维护一个quantityArray
来存储每个索引的当前数量
you need to maintain a quantityArray
to store current quantity of every index
var quantityArray:[Int] = [] //initialize quantity array
然后将初始数量值添加到 quantityArray
例如:如果您的列表数组数为 10,并且所有项目的初始数量将是一种方法向数组添加初始值
then add initial quantity values to quantityArray
For example : If your list array count 10 and initial quantity of all item will be one means
add initial values to the array
for i in 0 ..< 10 {
quantityArray.append(1)
}
然后在你的 tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath)
从quantityArray分配数量值
assign quantity value from quantityArray
cell.qtyLbl.text = "\(quantityArray[indexPath.row])"
cell.incrementBtn.tag = indexPath.row
cell.incrementBtn.addTarget(self, action: #selector(self.incrementBtnClicked(_:)), for: .touchUpInside)
cell.decrementBtn.tag = indexPath.row
cell.decrementBtn.addTarget(self, action: #selector(self.decrementBtnClicked(_:)), for: .touchUpInside)
将以下函数添加到您的 viewcontroller
add below functions into your viewcontroller
func incrementBtnClicked(_ sender:UIButton){
let increasedQty = quantityArray[sender.tag]+1
self.quantityArray.replaceSubrange(sender.tag, with: increasedQty)
self.tableView.reloadData
}
func decrementBtnClicked(_ sender:UIButton){
let decreasedQty = quantityArray[sender.tag]-1
self.quantityArray.replaceSubrange(sender.tag, with: decreasedQty)
self.tableView.reloadData
}
如果你这样使用,即使在滚动 tableview 之后,单元格中的数量也会从数量数组中填充
If you use like this even after scroll tableview also quantity in the cell will be populated from quantity array
希望对你有帮助