在 UICollectionview 中选择任何其他单元格时取消选择默认选定单元格答案

【问题标题】：Deselect default selected cell on selecting any other cell in UICollectionview在 UICollectionview 中选择任何其他单元格时取消选择默认选定单元格
【发布时间】：2021-08-24 07:11:21
【问题描述】：

使用 UICollectionView 显示日历，我已默认选择今天的日期，并希望在选择任何其他日期时取消选择该日期。以下是我的代码：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CalenderCell", for: indexPath) as! CalenderCollectionViewCell
    
    cell.lblDayName.text = arrCalendarDays[indexPath.item]
    cell.lblDate.text = arrCalendarOnlyDate[indexPath.item]
    
    if indexPath.item == 0 {
        if !isTodayDate {
        cell.isSelected = true
        } else {
            cell.isSelected = false
        }
    }
    
    return cell
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    isTodayDate = true

// Tried below code but not working
   /* collectionViewWeekCalendar.indexPathsForSelectedItems?
        .forEach {
            self.collectionViewWeekCalendar.deselectItem(at: $0, animated: false) }
    */
    let selectedCell:UICollectionViewCell = collectionViewWeekCalendar.cellForItem(at: indexPath)!
    selectedCell.isSelected = true
}

func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
    let selectedCell:UICollectionViewCell = collectionViewWeekCalendar.cellForItem(at: indexPath as IndexPath)!
    selectedCell.isSelected = false
}

问题是，在选择任何其他日期时，今天的选定日期不会取消选择。请指导。

【问题讨论】：

标签： ios swift uicollectionview calendar uicollectionviewcell

【解决方案1】：

hacky 和最简单的方法（我认为）使用选定的索引

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

  let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CalenderCell", for: indexPath) as! CalenderCollectionViewCell

  cell.lblDayName.text = arrCalendarDays[indexPath.item]
  cell.lblDate.text = arrCalendarOnlyDate[indexPath.item]

  if sellectedIndex == indexPath {
    cell.isSelected = true
  } else {
    cell.isSelected = false
  }

  return cell 
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    selectedIndex = indexPath
    collectionView.reloadData()
}

一开始，

set selectedIndex = today date Index

【讨论】：