重新加载 UIButton 以更改自定义徽章

Question

我创建了一个带有徽章的自定义 UIButton，我设置当徽章编号为 0 时，红色圆圈应该消失。

 open class ButtonWithBadge: UIButton {

   open func addBadgeIcon(badgeNumber: Int, color: UIColor) {
      let sizeThatFits = self.sizeThatFits(CGSize(width: bounds.width, height: CGFloat.greatestFiniteMagnitude))
      let badgeCount = UILabel(frame: CGRect(x: sizeThatFits.width - 15, y: -07, width: 18, height: 18))
      badgeCount.layer.borderColor = UIColor.clear.cgColor
      badgeCount.layer.borderWidth = 2
      badgeCount.layer.cornerRadius = badgeCount.bounds.size.height / 2
      badgeCount.textAlignment = .center
      badgeCount.layer.masksToBounds = true
      badgeCount.textColor = .white
      badgeCount.font = badgeCount.font.withSize(9)
      badgeCount.backgroundColor = badgeNumber == 0 ? .clear : color
      badgeCount.text = badgeNumber == 0 ? "" : "\(badgeNumber)"
      addSubview(badgeCount)
   }

我调用这个函数来改变徽章号码。当数字越来越小时，此函数可以完美运行，但是当我将 0 传递给它时，它无法制作背景徽章的 clear 并将其文本替换为 " "。它仅在您再次打开页面时有效，然后当徽章编号为 0 时，它不会添加该徽章计数视图。我应该以某种方式在按钮的编号为 0 时重新加载按钮以删除该徽章视图。谁能帮我解决这个问题。谢谢

Answer 1

试试下面的代码：

open class ButtonWithBadge: UIButton {

  open func addBadgeIcon(badgeNumber: Int, color: UIColor) {
  let sizeThatFits = self.sizeThatFits(CGSize(width: bounds.width, height: CGFloat.greatestFiniteMagnitude))
  let badgeCount = UILabel(frame: CGRect(x: sizeThatFits.width - 15, y: -07, width: 18, height: 18))
  badgeCount.layer.borderColor = UIColor.clear.cgColor
  badgeCount.layer.borderWidth = 2
  badgeCount.layer.cornerRadius = badgeCount.bounds.size.height / 2
  badgeCount.textAlignment = .center
  badgeCount.layer.masksToBounds = true
  badgeCount.textColor = .white
  badgeCount.font = badgeCount.font.withSize(9)
  badgeCount.backgroundColor = badgeNumber == 0 ? .clear : color
  badgeCount.text = badgeNumber == 0 ? "" : "\(badgeNumber)"
  if(badgeNumber != 0){
  addSubview(badgeCount)
  }
}

重新加载 UIButton 以更改自定义徽章

Reload UIButton for changing custom badge

uibutton

swift