问题描述

我有一个 tableview 单元格，里面有图像视图、标签和一个 ui 按钮，我需要在点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做按钮时，效果是一样的.请帮帮我！

I got a tableview cell inside that i have image view , label and a ui button , i need to change the button title text and background colour on click . But when i try to do button from multiple cell is having the same effect . Please do help me !

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 
}

推荐答案

首先你应该用一个 Array 来管理点击/改变 UIButton for reusableCell 否则，如果你上下滚动你的 tableView 那么它将被删除效果

First of all you should take one Array for manage clicked/changed UIButton for reusableCell otherwise if you scroll your tableView Up-Down then It will be remove effect

我正在给出我的逻辑.

1) 取一个可变数组名称为 temArray (大小等于您的 tableView 的行) 并且每个索引都有 0 值.你可以做到通过简单的重复值0.

1) Take one mutable Array name is temArray (Size equal to your tableView's Row) and it has 0 value for each index. you can do it by easy repeat value 0.

2) 在你的 cellForRowAtIndexPath 数据源方法检查

2) in you cellForRowAtIndexPath datasource method check

if temArray[indexPath.row] == 0 {
   /// Write code for default UIButton - That has normal behavior means not changed title and no set background color
}
else {
  /// Write code for What you want to keep UIButton title and background color
}

cell.yourButtonObject.tag = indexPath.row
cell.yourButtonObject.addTarget(self, action:#selector(handleButtonClicked(_:)), for: .touchUpInside). 

3) 并添加 handleButtonClicked 方法并更改 temArray 值

3) And add handleButtonClicked method and change temArray value

func handleButtonClicked(_ sender: UIButton) {
        let myIndexPath = NSIndexPath(row: sender.tag, section: 0)
        let cell = tblViewPref.cellForRow(at: myIndexPath as IndexPath)
        if temArray[sender.tag] == 0 {
        /// You can access your button by
        // cell.myButton..... change here text and background color
        // And change "temArray"

        temArray[sender.tag] = 1
       }
       else {

           /// You can access your button by
          // cell.myButton..... change here text and background color
          // And change "temArray"

         // SET DEFULT BUTTON TITLE AND BACKGROUND COLOR

         temArray[sender.tag] = 0
       }
    }

因此，当您向上滚动表格时，temArray 将由 cellForRowAtIndexPath 数据源方法中 indexPath 处的值管理.

So when you scroll your table Up-down temArray will be managed by it's value at indexPath in cellForRowAtIndexPath Datasource method.

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