Question

我有一个带有按钮的自定义单元格的表格视图..如果我点击按钮，则应该执行操作..

问题是按钮没有被按下，整个单元格被点击，我想要的动作永远不会发生！

如何解决？我想点击按钮而不是单元格，并在点击时执行特定操作..

这里我正在做什么，但没有工作..

自定义单元格：

 class CustomViewCell8: UITableViewCell {

var onButtonTapped : (() -> Void)? = nil
@IBOutlet weak var servicebtn: UIButton!

@IBAction func Clicked(_ sender: UIButton) {
    if let onButtonTapped = self.onButtonTapped{
        onButtonTapped()
    }
}

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
}

}

并在视图控制器中：

      func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableview.dequeueReusableCell(withIdentifier: "CustomCell8") as! CustomViewCell8
    cell.servicebtn.setBackgroundImage(UIImage(named: serviceimage[indexPath.row]) as UIImage?, for: UIControlState.normal)

    cell.onButtonTapped = {
        if self.number == 1 {
            if indexPath.row == 0{
                let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
                let vc: UIViewController = storyboard.instantiateViewController(withIdentifier: " ") as UIViewController
                self.present(vc, animated: true, completion: nil)
                let userDefaults = UserDefaults.standard
                let decoded  = userDefaults.object(forKey: "services") as! Data
                let decodedService = NSKeyedUnarchiver.unarchiveObject(with: decoded) as! [Service]

                for service in decodedService {
                    if service.name == " "{
                        GetShiftsAndPrices(id: service.id)
                    }
                }
            }else if indexPath.row == 1{
                let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
                let vc: UIViewController = storyboard.instantiateViewController(withIdentifier: " ") as UIViewController
                self.present(vc, animated: true, completion: nil)
                let userDefaults = UserDefaults.standard
                let decoded  = userDefaults.object(forKey: "services") as! Data
                let decodedService = NSKeyedUnarchiver.unarchiveObject(with: decoded) as! [Service]

                for service in decodedService {
                    if service.name == " "{
                        GetShiftsAndPrices(id: service.id)

                    }
                }
            }else if indexPath.row == 2{
                let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
                let vc: UIViewController = storyboard.instantiateViewController(withIdentifier: " ") as UIViewController
                self.present(vc, animated: true, completion: nil)
                let userDefaults = UserDefaults.standard
                let decoded  = userDefaults.object(forKey: "services") as! Data
                let decodedService = NSKeyedUnarchiver.unarchiveObject(with: decoded) as! [Service]

                for service in decodedService {
                    if service.name == " "{
                        GetShiftsAndPrices(id: service.id)


                    }
                }
            }

       ......
    return cell
}

这之前和我一起工作..但现在不行！我不知道出了什么问题。我做错了吗？

Answer 1

您表示即使您的print("here")按钮中的@IBAction也无法打印。您还表示您的@IBAction已正确连线。这意味着您的原型单元存在问题。如果包含按钮的视图小于按钮，则您无法单击它。检查原型单元的布局。

原始答案

看起来它应该有效。

三条评论：

您应该在关闭声明中添加[unowned self]以避免强引用循环，这将阻止UITableView被释放。由于该单元格不会比其包含的UITableView更长，因此无需对self进行强有力的引用。
```
cell.onButtonTapped = { [unowned self]
    if self.number == 1 {
    ...
```

您可以使用可选链接替换：

if let onButtonTapped = self.onButtonTapped{
   onButtonTapped()
}

简单地说：

self.onButtonTapped?()

您的代码非常重复。如果行之间的唯一区别是下一个ViewController的标识符，那么你可以这样做：

let nextvcid = ["foo", "bar", "baz"][indexPath.row]

cell.onButtonTapped = { [unowned self]
    if self.number == 1 {
        let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let vc: UIViewController = storyboard.instantiateViewController(withIdentifier: nextvcid)
        self.present(vc, animated: true, completion: nil)
        let userDefaults = UserDefaults.standard
        let decoded  = userDefaults.object(forKey: "services") as! Data
        let decodedService = NSKeyedUnarchiver.unarchiveObject(with: decoded) as! [Service]

        for service in decodedService {
            if service.name == " "{
                GetShiftsAndPrices(id: service.id)
            }
        }

单击表格视图中的按钮

1 个答案: