Arrays 如何从集合视图中删除多个选定单元格？（swift）

我在集合视图中的所有单元格中都有5个数组

如何从集合视图中删除多个选定单元格

var _selectedCells : NSMutableArray = []

删除按钮

@IBAction func DeleteButton(_ sender: UIBarButtonItem) {
       // How delete multiple selected cells from collection view
}

添加单元格索引

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
     if self.EditToolBar.isHidden == true {
          self.performSegue(withIdentifier: "DetailVC", sender: indexPath.item)
     } else {
          print("EditMode")
          _selectedCells.add(indexPath)
          print("selectedCells - \(_selectedCells)")
     }
}

删除单元格索引

func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
     if self.EditToolBar.isHidden == true {
     } else {
          print("EditMode")
          _selectedCells.remove(indexPath)
          print("unselectedCells - \(_selectedCells)")
     }
}

崩溃

***由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因：“无效更新：节0中的项数无效。”。更新（5）后现有节中包含的项目数必须等于更新（5）前该节中包含的项目数，加上或减去从该节插入或删除的项目数（0插入，2删除），加上或减去移入或移出该节的项目数（0迁入，0迁出）。'

添加单元格索引

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
     if self.EditToolBar.isHidden == true {
          self.performSegue(withIdentifier: "DetailVC", sender: indexPath.item)
     } else {
          print("EditMode")
         if !(_selectedCells.contains(indexPath)) {
              _selectedCells.add(indexPath)
              print("selectedCells - \(_selectedCells)")
         }

     }
}

删除单元格索引

func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
     if self.EditToolBar.isHidden == true {
     } else {
          print("EditMode")

        if let index = _selectedCells.index(where: { $0 == indexPath }) {
       _selectedCells.remove(at: index)
        print("unselectedCells - \(_selectedCells)")

         }   
     }
}

删除按钮操作

@IBAction func DeleteButton(_ sender: UIBarButtonItem) {
       // Two Things To make sure of 
       // 1. Never call reloadData() right after insert/move/deleteRows..., the insert/move/delete operation reorders the table and does the animation
       // 2. Call insert/move/deleteRows... always after changing the data source array.


       // remove the data from data Source Array you passed ,of selected cells you're trying to delete .

     self.collectionView.performBatchUpdates({
         self.collectionView.deleteItems(at indexPaths: _selectedCells)
     }){
              // optional closure
            print(“finished deleting cell”)
      }



}

---

您不能仅从集合的数据源中删除项，还必须告诉集合视图这些项已被删除。为此，请使用

deleteems（在IndexPath:[IndexPath]）

。如该方法的文档中所述，您还可以从

performBatchUpdates（…）调用它

如果您想同时进行多个更改，例如，如果您想同时添加项目和删除项目。

在

numberOfRowsInSection

方法中，返回

\u selectedCells.count

然后在每个

方法中删除
和
取消选择
方法，relod.tableview对不起，我不需要他转到collectionview。我正在尝试更改self.collectionview.deleteItems（在：self.selectedCells）并在按下Delete按钮时应用程序崩溃。更新了我的答案
@IBAction func DeleteButton(_ sender: UIBarButtonItem) {
       // Two Things To make sure of 
       // 1. Never call reloadData() right after insert/move/deleteRows..., the insert/move/delete operation reorders the table and does the animation
       // 2. Call insert/move/deleteRows... always after changing the data source array.


       // remove the data from data Source Array you passed ,of selected cells you're trying to delete .

     self.collectionView.performBatchUpdates({
         self.collectionView.deleteItems(at indexPaths: _selectedCells)
     }){
              // optional closure
            print(“finished deleting cell”)
      }



}