Ios 索引还是标签？用于IBOutletCollection中作为按钮的多个复选框

我对swift有点陌生，但有人提到我应该在IBMoutletCollection中为按钮使用索引或标记

我不知道如何索引或标记特定按钮，然后在下列情况下引用它们：

// images of checked and unchecked boxes for the button to switch between
var BoxON = UIImage(named: "CheckBox")
var BoxOFF = UIImage(named:"UnCheckBox")

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    boxes.forEach {
        $0.setImage(BoxOFF, for: .normal)
        $0.setImage(BoxON, for: .selected)
    }

}

@IBOutlet var boxes : [UIButton]!

@IBAction func boxTouched(_ sender: UIButton) {
    sender.isSelected = !sender.isSelected
    let index = boxes.index(of: sender)!
    switch index {

        case 0:
            sender.isSelected = !sender.isSelected
        case 1:
            sender.isSelected = !sender.isSelected
        case 2:
            sender.isSelected = !sender.isSelected
        case 3:
            sender.isSelected = !sender.isSelected
        case 4:
            sender.isSelected = !sender.isSelected
        default:
            sender.isSelected = !sender.isSelected

    }
}

提前感谢！：）

编辑： 卸下开关并替换为if语句（它可以工作！）

---

单击故事板中的每个按钮，然后在属性检查器中设置标记。这是您应该做的，因为IBOutletCollections不能保证维护订单

然后在代码中，您只需像这样访问标记：sender.tag

@IBAction func clickedButton(_ sender: UIButton) {

    switch sender.tag {
    case 0:
        print("this is button 0")
    case 1:
        print("this is button 1")
    case 2:
        print("this is button 2")
    default:
        print("unknown button")
    }
}

---

在按住ctrl键并将每个按钮拖动到该方法后，这对我有效。

在情节提要上，您可以在属性检查器中为每个按钮设置标记。以下是更改后的代码：

@IBAction func boxTouched(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
let buttonTag = sender.tag
switch tag {

    case 0:
        //code you want to write for case 0
    case 1:
        //code you want to write for case 1
    case 2:
        //code you want to write for case 2
    case 3:
        //code you want to write for case 3
    case 4:
        //code you want to write for case 4
    default:
        //code you want to write for default case

}

---

}

谢谢！因此，我更改了标记#，并将switch语句条件更改为sender.tag。不太清楚为什么我的代码不起作用。请确保按住ctrl键并单击所有按钮并将其拖动到iAction方法。是否已正确连接iAction？如果在

boxTouched

方法中放置断点，是否会被击中？此外，将按钮设置为“选中”可能并没有达到预期效果。当可访问性功能打开时，“选中”按钮将使该按钮成为选中按钮，以便向有视觉障碍的iOS用户读取该按钮。是！my sender.isselected处理的案例有误您可能应该演示如何将按钮连接到iAction。您的

开关有什么意义？每个案例都会执行相同的操作，实际上会撤消在
boxTouched
函数的第一行中所做的更改。是的！谢谢，我刚刚意识到这一点，并通过移除开关并替换为：if sender.isSelected{sender.setImage（BoxOFF，表示：.normal）sender.setImage（BoxON，表示：.selected）}
@IBAction func boxTouched(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
let buttonTag = sender.tag
switch tag {

    case 0:
        //code you want to write for case 0
    case 1:
        //code you want to write for case 1
    case 2:
        //code you want to write for case 2
    case 3:
        //code you want to write for case 3
    case 4:
        //code you want to write for case 4
    default:
        //code you want to write for default case

}