How can i click button and change label text in tablewviewcell

问题

I want to change label text when i was click button in every TableViewCell

I mean have 2(-,+) button and 1 label, When I click on the button, the label will increase or decrease.

I have no idea How to do it?

回答1:

you need to maintain a quantityArray to store current quantity of every index

var quantityArray:[Int] = [] //initialize quantity array

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)
}

then in your tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath)

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)

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
}

If you use like this even after scroll tableview also quantity in the cell will be populated from quantity array

Hope this will help you

回答2:

All you have to do is to add an action to your button and do your job.

@IBAction func increase() {
    quantityLabel.text = "\(quantity)" // increase the quantity number and set it
}

btw. before getting any help you should consider posting your code.

来源：https://stackoverflow.com/questions/47527937/how-can-i-click-button-and-change-label-text-in-tablewviewcell

标签

swift

uitableview

uibutton

uilabel