如何在swift 3中的tableview单元格内单击更改按钮标题 [英] how to change the button title on click inside a tableview cell in swift 3

问题描述

我在里面有一个tableview单元格，我有图像视图，标签和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做按钮具有相同的效果。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

首先你应该拿一个数组用于管理点击/更改 UIButton 用于 reusableCell 否则如果你滚动你的tableView Up-Down然后它将被移除效果

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

我给出了我的逻辑。

1）Take一个可变数组名称是 temArray （大小等于tableView的行），并且每个索引的值都为 0 。 你可以做到通过轻松重复值 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 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 value

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
       }
    }

所以滚动你的桌子时上下 temArray 将通过 indexPath 中的值在 cellForRowAtIndexPath 数据源方法。

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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