ios - 如何在 swift 3 的 tableview 单元格内单击更改按钮标题

Question

我在里面有一个 tableview 单元格，我有 ImageView 、标签和一个 ui 按钮，我需要在单击时更改按钮标题文本和背景颜色。但是当我尝试从多个单元格中执行按钮时，效果相同。请帮帮我!

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: "cell1", for: indexPath) as! subTableViewCell

    cell.catNameLabel.text = categoryNameArray[indexPath.row]

    cell.descLabel.text = descriptionArray[indexPath.row]

    cell.freqLabel.text = frequency[indexPath.row] + " at " + frequencyTime[indexPath.row]

    let url = "http://wiinnova.com/tenly/image/category_image/\(categoryImageArray[indexPath.row])"

    cell.img.imageFromServerURL(urlString: url)
    cell.button.tag = indexPath.row
    return cell 
}

Answer 1

你根本不需要分配button.tag，方法如下:

首先将target 添加到您的按钮。喜欢:

cell.button.addTarget(self, action:#selector(handleRegister(_:)), for: .touchUpInside). 

然后:

//This function will be called for each button click. 

func handleRegister(sender: UIButton) {

let buttonPosition = sender.convert(CGPoint.zero, to: YOUR_TABLE_VIEW)
let indexPath: IndexPath? = YOUR_TABLE_VIEW.indexPathForRow(at: buttonPosition)

let cell = YOUR_TABLE_VIEW.cellForRow(at: indexPath as IndexPath)

//Now change the text and background colour
cell.button.setTitle("Button Title",for: .normal)
cell.button.backgroundColor = UIColor.blueColor()

   //...
}

要跟踪更改后的按钮背景和标题，您需要一个数组，如 @Tofaani Kaanudo 的回答所建议的那样。