EDITED

Question

我有一个类似测验应用的应用。在tableViewCell中，有4个按钮用于任务的变体。当用户按下按钮时我需要改变颜色，当我尝试在按钮的动作中改变颜色时，按钮的颜色在所有表视图单元格中都会改变。但是我需要改变，只有在我按下的地方。我已经尝试过编写委托了，但它给出了相同的结果，这就是我编写代理的代码：

class CustomButton: UIButton {

override var isHighlighted: Bool {
    didSet {
        if isHighlighted {
            backgroundColor = UIColor.lightGray
        } else {
            backgroundColor = UIColor.init(red: 34/255, green: 89/255, blue: 128/255, alpha: 1.0)
        }
    }
}

}

我已经为按钮添加了目标操作。

var variant1 = UIButton()
var variant2 = UIButton()
var variant3 = UIButton()
var variant4 = UIButton()

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "finalCell")!
    variant1 = cell.contentView.viewWithTag(1) as! UIButton
    variant2 = cell.contentView.viewWithTag(2) as! UIButton
    variant3 = cell.contentView.viewWithTag(3) as! UIButton
    variant4 = cell.contentView.viewWithTag(4) as! UIButton


    if (numberOfVariants.count != 0) {
        let questionTextView = cell.contentView.viewWithTag(5) as! UITextView
        questionTextView.text = "\(Questions[indexPath.row].content!)"
        variant1.addTarget(self, action: #selector(self.variant1ButtonPressed), for: .touchUpInside)
        variant2.addTarget(self, action: #selector(self.variant2ButtonPressed), for: .touchUpInside)
        variant3.addTarget(self, action: #selector(self.variant3ButtonPressed), for: .touchUpInside)
        variant4.addTarget(self, action: #selector(self.variant4ButtonPressed), for: .touchUpInside)
          }
        return cell
    }

当用户点击按钮时，我已经识别了表视图的indexPath（如果它有用）：

    func variant1ButtonPressed(_ sender:AnyObject) {
    print("Variant1")
    let buttonPosition:CGPoint = sender.convert(CGPoint.zero, to:self.tableView)
    let indexPath = self.tableView.indexPathForRow(at: buttonPosition)
    let intIndexpath = Int((indexPath?.row)!)
    globalIndexPath = intIndexpath
}
func variant2ButtonPressed(_ sender:AnyObject) {
    let buttonPosition:CGPoint = sender.convert(CGPoint.zero, to:self.tableView)
    let indexPath = self.tableView.indexPathForRow(at: buttonPosition)
    let intIndexpath = Int((indexPath?.row)!)
    globalIndexPath = intIndexpath

}
func variant3ButtonPressed(_ sender:AnyObject) {
    let buttonPosition:CGPoint = sender.convert(CGPoint.zero, to:self.tableView)
    let indexPath = self.tableView.indexPathForRow(at: buttonPosition)
    let intIndexpath = Int((indexPath?.row)!)
    globalIndexPath = intIndexpath


}
func variant4ButtonPressed(_ sender:AnyObject) {
    let buttonPosition:CGPoint = sender.convert(CGPoint.zero, to:self.tableView)
    let indexPath = self.tableView.indexPathForRow(at: buttonPosition)
    let intIndexpath = Int((indexPath?.row)!)
    globalIndexPath = intIndexpath


}

这在故事板中看起来如何（如果有帮助的话）

Answer 1

我认为你使用的代码比实际需要的代码多得多，所以这是使用closures的另一种方法，我的故事板中只有一个viewController，内部添加了一个UITableView，一个名为{的customCell {1}}然后我将一个普通的UIButton链接到那个单元格作为@IBOutlet，就是这样，完整的实现就在这里

https://github.com/rmelian2014/SOButtonsTableViewCellQuestion

EDITED

ButtonTableViewCell

ButtonTableViewCell

的ViewController

    import UIKit

@IBDesignable
class ButtonTableViewCell: UITableViewCell {

    @IBInspectable var selectedColor : UIColor = UIColor.red
    @IBInspectable var normalColor : UIColor = UIColor.blue

    static let cellHeigth : CGFloat = 360

    @IBOutlet var buttonsArray: [UIButton]!
    var selectedText : String?{
        willSet{
            guard newValue != nil else{
                return
            }

            var foundedIndex = -1
            for (index,text) in self.texts.enumerated() {
                if(text == newValue!){
                    foundedIndex = index
                    break
                }
            }

            guard foundedIndex != -1 else
            {
                return
            }

            self.buttonsArray[foundedIndex].backgroundColor = selectedColor
        }
    }
    var texts : [String] = []

    var buttonActionClosure : ((_ selectedText:String?)->Void)?

    func setupWithClosure(texts:[String],textSelected:String?,closure:((_ selectedText:String?)->Void)?)
    {
        self.texts = texts

        for (index,button) in self.buttonsArray.enumerated(){
            if(self.texts.count > index)
            {
                button.setTitle(self.texts[index], for: .normal)
            }
            button.tag = index
            button.backgroundColor = self.normalColor
        }


        self.selectedText = textSelected
        if(closure != nil)
        {
            self.buttonActionClosure = closure
        }


    }

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

    @IBAction func buttonAction(sender:UIButton)
    {
        if(self.texts.count > sender.tag){
            let newSelectedText = self.texts[sender.tag]

            if(newSelectedText != self.selectedText){
                self.selectedText = newSelectedText
            }else
            {
                self.selectedText = nil
            }
        }
        if(self.buttonActionClosure != nil)
        {
            self.buttonActionClosure!(self.selectedText)
        }
    }

    override func prepareForReuse() {
        super.prepareForReuse()
        self.buttonActionClosure = nil
    }

}

希望这有助于你

Answer 2

在 cellForRowAt indexPath：方法中，您需要检查行的索引路径是否与所选按钮的索引路径相同。如果相同则需要显示突出显示的颜色，否则显示正常颜色。

所以保存buttonpressedmethod中全局变量中按下的按钮的索引路径。让valiable成为selectButtonIndexPath。

在 cellForRowAt indexPath：方法

中添加以下代码

 if indexPath.row==selectedButtonIndexPath.row {
        backgroundColor = UIColor.lightGray
    } else {
        backgroundColor = UIColor.init(red: 34/255, green: 89/255, blue: 128/255, alpha: 1.0)
    }

当单击按钮以反映颜色的变化时，当然会重新加载您的tableview。

更新1：

您是否可以通过获取sender.tag然后更改if条件来尝试保存按钮按钮的标签

if indexPath.row==selectedButtonIndexPath.row  {
    if buttonTag == 1{
        variant1.backgroundcolor = UIColor.lightGray
        variant2.backgroundColor = UIColor.init(red: 34/255, green: 89/255, blue: 128/255, alpha: 1.0)
        // and so on for all buttons.
    }else if buttonTag == 2{
        // same as above but for variant2
    }
} else {

}

如何更改特定TableViewCell中的Button颜色

2 个答案:

EDITED

ButtonTableViewCell

的ViewController