ios - 如何找到选定的 Collection View Cell 的索引路径？

Question

如何在不使用 didSelectItemAtIndexPath 和 prepareForSegue 的情况下为选定的 Collection View Cell 查找索引路径？

我在 AlertViewController 中使用这个 indexPath。我不知道如何在 AlertView Controller 中获取此 indexPath。

//Edit Selected Category
        let alertController = UIAlertController(title: "Alert", message: "Rename your ", preferredStyle: .alert)
        let actionOK = UIAlertAction(title: "OK", style: .default)

        alertController.addTextField(configurationHandler: {(textField: UITextField) -> Void in

            if let iP: IndexPath = self.collCategory.indexPath(for: CategoryCollectionCell) {

                print("IP \(iP)")
            }

        })

        alertController.addAction(actionOK)
        self.present(alertController, animated: true, completion: nil)

Answer 1

使用这个:

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        collectionView.selectItem(at: indexPath, animated: false, scrollPosition: .bottom)
}

然后你将从 collectionView.indexPathsForSelectedItems 获取路径

if let collectionView = self.YourCollectionView,
    let indexPath = collectionView.indexPathsForSelectedItems?.first,
    let cell = collectionView.cellForItem(at: indexPath) as? YourCell {
}