UICollectionView 在 prepareForSegue 中获取 indexPath

Question

对于我的集合视图，我使用 didSelectItemAt 调用 performSegue。我的问题是发件人是我的 vc 而不是单元格本身。所以在 prepareForSegue 中，我收到一个错误，因为我无法将 vc 转换为我的单元格类型。

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
   performSegue(withIdentifier: "collectionSegue", sender: self)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
   if let destinationVC = segue.destination as? ImageViewController {
      let cell = sender as! ImageCollectionViewCell 
      let indexPath = imageCollectionView.indexPath(for: cell)
      destinationVC.buttonTag = indexPath?.row
   }
}

Answer 1

您可以将发件人设置为任何您想要的。这可能有帮助：

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
       let cell = collectionView!.cellForItemAtIndexPath(indexPath) as! ImageCollectionViewCell
       performSegue(withIdentifier: "collectionSegue", sender: cell)
    }

Answer 2

试试这个

var currentIndex = 0
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
   self.currentIndex = indexPath.row
   performSegue(withIdentifier: "collectionSegue", sender: self)
   //let cell = sender as! ImageCollectionViewCell
   //performSegue(withIdentifier: "collectionSegue", sender: cell)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
   if segue.identifier == "collectionSegue" {
    if let destinationVC = segue.destination as? ImageViewController {
        //let indexPath = imageCollectionView.indexPath(for: cell)
        //let indexPath = imageCollectionView.indexPath(for: sender as! ImageCollectionViewCell)
        destinationVC.buttonTag = self.currentIndex
    }
  }
}

UICollectionView 在 prepareForSegue 中获取 indexPath

UICollectionView Getting indexPath in prepareForSegue

ios

uicollectionview

swift

indexpath