如何在表格视图中增加所选索引的字体颜色和字体大小？

Question

在这里，我需要实现此页面，如图所示，为此我放置了一个表视图和集合视图，但是如果我选择特定的类别，那么如何使选定的字体大小更大，字体颜色需要如图所示进行更改在图像，但运行应用程序后，如果我选择屏幕打开当时第一次默认它应该被选择是What's New后来它需要更改为我选择的任何人可以帮助我如何解决这个问题？

这是我的屏幕，设计如下：

这是我设计的屏幕，其中包含以下问题：

这是我已经尝试过的代码

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "categoriesTableCell", for: indexPath)  as! categoriesTableViewCell
    if indexPath.row == currentSelection {
    let item = categoriesModelClass?.childrenData[indexPath.row]
    cell.categoriesProductsLabel.font = UIFont(name:"Bold", size:17)
    cell.categoriesProductsLabel.textColor = UIColor.black
    let underlineAttribute = [NSUnderlineStyleAttributeName: NSUnderlineStyle.styleSingle.rawValue]
    let underlineAttributedString = NSMutableAttributedString(string: (item?.name)! , attributes: underlineAttribute)
            underlineAttributedString.addAttribute(NSUnderlineColorAttributeName, value: UIColor.cyan, range: NSRange(location: 0, length: (item?.name?.characters.count)!))
            cell.categoriesProductsLabel.attributedText = underlineAttributedString
    }
    else {
          let item = categoriesModelClass?.childrenData[indexPath.row]
          print(item?.name)
          cell.categoriesProductsLabel.textColor = UIColor.darkGray
          //cell.categoriesProductsLabel.font = UIFont.init(name: "Regular", size: 12)
          cell.categoriesProductsLabel.text = item?.name
    }
    return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let previousSelection = self.currentSelection
    self.currentSelection = indexPath.row
    self.categoriesCollectionView.reloadData()
    print(indexPath.row)
    if previousSelection == 0 {
        sideTableView.reloadRows(at: [indexPath], with: .none)
    }
    else {
        let prevIndexPath = IndexPath(row: previousSelection, section: 0)
        self.sideTableView.reloadRows(at: [prevIndexPath,indexPath], with: .none)
    }
}

Answer 1

覆盖您的categoriesTableViewCell类中的setSelected方法，不要在cellForRowAt或didSelectRowAt中更新

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)
    if selected{
        categoriesProductsLabel.font = UIFont(name:"Bold", size:17)
        categoriesProductsLabel.textColor = UIColor.black

     }else{
        categoriesProductsLabel.textColor = UIColor.darkGray
        categoriesProductsLabel.font = UIFont.init(name: "Regular", size: 12)

     }
}

Answer 2

覆盖didSelectRowAtIndexPath和didselectRowAtIndexPath两种方法来更改和恢复原始字体大小和颜色

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
          //get cell with indexpath
  cell.categoriesProductsLabel.font = UIFont(name:"Bold", size:17)
    cell.categoriesProductsLabel.textColor = UIColor.black

}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
     //get cell with indexpath
     cell.categoriesProductsLabel.textColor = UIColor.darkGray
    cell.categoriesProductsLabel.font = UIFont.init(name: "Regular", size: 12)

}    

Answer 3

你必须更新条件，你的代码也可以按你的意愿工作： -

替换这个： -

if previousSelection == 0 {
    sideTableView.reloadRows(at: [indexPath], with: .none)
}
else {
    let prevIndexPath = IndexPath(row: previousSelection, section: 0)
    self.sideTableView.reloadRows(at: [prevIndexPath,indexPath], with: .none)
}

这一个： -

    let prevIndexPath = IndexPath(row: previousSelection, section: 0)
    self.sideTableView.reloadRows(at: [prevIndexPath,indexPath], with: .none)