允许在数组中选择一个 UIButton 并取消选择其他 UIButton

Question

应用从 API 产品选项(如电子商务应用的颜色和大小(加载。现在，我有点卡在代码中。

如果选择一个按钮，让我们说出它的颜色，则应取消选择另一个按钮，因为您一次只能使用一种颜色。请看一下下面的代码。下面的代码是点击按钮时的目标操作。

func imgSelected(_ sender: RadioButton) {
guard let currentButton = sender as? UIButton else { return }
if ((currentButton.isSelected) != nil){
currentButton.isSelected = true
var dict = JSON(self.catalogProductViewModel.getOption[(sender.superview?.tag)!]);
let productOptionArray : JSON = JSON(dict["product_option_value"].arrayObject!)
imageId[(sender.superview?.tag)!] = productOptionArray[sender.tag]["product_option_value_id"].stringValue
currentButton.layer.borderWidth = 3.0
currentButton.layer.borderColor = UIColor.red.cgColor
print("Button Not Clicked ((sender as? RadioButton)?.tag)")
} else {
currentButton.layer.borderWidth = 0
currentButton.layer.borderColor = UIColor.clear.cgColor
print("Button Removed ((sender as? RadioButton)?.tag)")
}
}

然而，我可以看到所有选项都是可选的，我在论坛中尝试了所有可能的例子，而不是与我一起工作。我将产品选项投射到购物车时我面临的另一个问题，它返回选项标题而不是所选值，例如它投射为"颜色"而不是"红色"。

else if dict["type"].stringValue == "image" {
if dict["required"].intValue == 1{
if imageId[i] == ""{
isValid = 1;
errorMessage = errorMessage+dict["name"].stringValue
print("Error Message", errorMessage)
}else{
optionDictionary[dict["product_option_id"].stringValue] = imageId[i] as AnyObject
print("Else is Valid 0", optionDictionary[dict["product_option_id"].stringValue] )
}
}else{
optionDictionary[dict["product_option_id"].stringValue] = imageId[i] as AnyObject
print("Stand Alone", optionDictionary[dict["product_option_id"].stringValue])
}
}

Answer 1

对于效果等单选按钮，您可以执行以下操作

//This is the implementation of my custom button
class RadioButton: UIButton {
override var isSelected: Bool {
didSet {
refresh()
}
}
private func refresh() {
//Here We will do when button state changed to selected (maybe radion image selected/ unselected)
if isSelected {
//do the selection
layer.borderWidth = 1.0
layer.borderColor = UIColor.red.cgColor
} else {
//clear the selection
layer.borderWidth = 0.0
layer.borderColor = UIColor.clear.cgColor
}
}
}

class MyViewController: UIViewController {
@IBOutlet var radioButtons: [RadioButton]!

//let say when buttons is clicked we get the call to this function'
@IBAction private func radioButtonTapped(_ sender: RadioButton) {
//first clear the buttons selected state
clearAllSelection()
//now select the one that triggered this function
sender.isSelected = true
}
//clears selected state for all buttons
private func clearAllSelection() {
radioButtons.forEach {
$0.isSelected = false
}
}
}

好的，最后我有时间查看RadioButton库，我想您可能忘记对按钮进行分组，以便它们都属于同一组，因此只会从该组中选择一个。我使用库createButtonMethod创建了一个小示例。请检查并让我知道这是否是您所追求的。

func createButtons() {
let xpos: CGFloat = 50
var ypos: CGFloat = 100
for i in 1...3 {
//create the button with frame
let frame = CGRect(x: xpos, y: ypos, width: 60, height: 50) //frame for the button
let radioButton = RadioButton(frame: frame)
radioButton.backgroundColor = UIColor.red
//append that button
buttonArray.append(radioButton)
//increase the ypos
ypos += 65
//set the tag
radioButton.tag = i
//add the target
radioButton.addTarget(self, action: #selector(radioButtonSelected(_:)), for: .touchUpInside)
//set the selected and unselected state image of radio button
radioButton.setImage(#imageLiteral(resourceName: "checked"), for: .selected)
radioButton.setImage(#imageLiteral(resourceName: "unchecked"), for: .normal)
//finally add that button to the view
view.addSubview(radioButton)
}
//set the group
buttonArray.first!.groupButtons = buttonArray
//set first one slected
buttonArray.first!.isSelected = true

debugPrint(buttonArray)
}


@objc func radioButtonSelected(_ sender: RadioButton) {
debugPrint("TAG : (sender.tag)")
}

这里的buttonArray是可变的var buttonArray = [RadioButton]()