如何将UITolViewViewCell中的UITolViewViewCell的选定索引路径保存到数组中？

Question

我有UITableView内的UICollectionViewCells。我试图突出显示所选UICollectionViewCell为每行UITableView。当UITableView重新加载选中的单元格时应该突出显示。下面是示例代码：

var selectedIndexes = [IndexPath]() 
var familyAModelArray : [[Child1]] = [] 
var childAModelArray : [Child1] = [] 

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { 

     return familyAModelArray[collectionView.tag].count 

} 

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


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

     cell.nameLabel.text = childAModelArray[indexPath.row].person! // or childArray 

     cell.profilePicture.sd_setImage(with: URL(string: "\(baseUrl)\(childAModelArray[indexPath.row].image!)"), placeholderImage: #imageLiteral(resourceName: "avatar.png"), options: [.continueInBackground,.progressiveDownload]) 

    return cell 
     } 

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

     selectedIndexes.append(indexPath) 

     let i = selectedIndexes[collectionView.tag][indexPath.row] 

} 

在这里，我得到了超出范围的索引：let i = selectedIndexes[collectionView.tag][indexPath.row]

如何做到这一点任何想法在此先感谢？。

Answer 1

一个好方法，以检查是否正在选择你的细胞是改变细胞

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { 
    let cell = collectionView.cellForItemAt(indexPath) 
    cell.backgroundColor = .red 

    // append the selected red cells to an array like such 
    selectedIndices.append(indexPath) 


} 

的背景颜色一旦重新加载的tableView你可以检查你的阵列选定的指标，改变背景颜色。现在

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


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

    if selectedIndices.contains(indexPath) { 
     cell.backgroundColor = .red 
     // check if the index matches a selectedIndex and change it to the selected color. 
    } 
    cell.nameLabel.text = childAModelArray[indexPath.row].person! // or childArray 

    cell.profilePicture.sd_setImage(with: URL(string: "\(baseUrl)\(childAModelArray[indexPath.row].image!)"), placeholderImage: #imageLiteral(resourceName: "avatar.png"), options: [.continueInBackground,.progressiveDownload]) 

return cell 
} 

一旦它重新加载，该cellForItemAt函数被再次调用，并在选定的指数路径的指数将再次为红色。