Question

问题是当我选择按钮时我试图更改按钮的图像，但它只更改了最后一个按钮。我实际上在另一个stackoverflow问题中找到了下面的代码，但它不起作用。（我以编程方式创建了我的按钮）

var buttonSelect = UIButton(frame: CGRect(x: 340, y: 40, width: 40, height: 21))
var s = 1

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    guard let cell  = tableView.dequeueReusableCell(withIdentifier: "FirstSection", for: indexPath) as? ShopTableViewCell else {
        fatalError("error")
    }

    if indexPath.section == 0 {
        buttonSelect.addTarget(self, action: #selector(ShopTableViewController.btnChoose), for: .touchUpInside)
        buttonSelect.tag = indexPath.row

        cell.contentView.addSubview(buttonSelect)
    }
}

@IBAction  func btnAdd (_ sender: UIButton) {
    buttonSelect = UIButton(frame: CGRect(x: 280, y: 10, width: 40, height: 21))
    buttonSelect.setImage(UIImage(named : "buttontick"), for: .normal)

    //I add my button in each cell every time I pressed add button

    //other codes...
}


@IBAction func btnChoose(_ sender: UIButton) {

    if buttonSelect == sender {
        if s % 2 == 0 {
            buttonSelect.setImage(UIImage(named : "notclicked"), for: .normal)
            s = s + 1
        } else {
            buttonSelect.setImage(UIImage(named : "buttontick"), for: .normal)
            s = s + 1
        }
    }
}

Answer 1

  override func awakeFromNib() {
    setImage(#imageLiteral(resourceName: "ic_radio_button_unchecked"), for: .normal)
    setImage(#imageLiteral(resourceName: "ic_radio_button_checked"), for: .selected)

    self.addTarget(self, action: #selector(ToggleButton.tapped), for: .touchUpInside)
  }

  @objc func tapped() {
    self.isSelected = !self.isSelected
  }

Swift中选定/未选定的UIButton

1 个答案: