如何使用单元格中的按钮删除集合视图中的项目?

问题描述

看起来应该很容易做到，但是当X"被删除时，如何删除 indexPath 处的项目.单元格中的按钮被点击?

It seems like it should be easy to do, but how do I delete the item at the indexPath when the "X" button in the cell is tapped?

我是否在 Cell 类中创建了一个 IBAction?如果是这样，我如何传入 indexPath.item?

Do I create an IBAction in the Cell class? If so, how do I pass in the indexPath.item?

在我所做的一些研究中，我看到人们使用通知和观察者，但这似乎过于复杂.

In some research I have done, I've seen people use notifications and observers, but it seems to be overcomplicated.

有人可以提供使用删除按钮删除 indexPath 处的单元格的基本解决方案吗?

Can someone provide a basic solution for deleting a cell at the indexPath with a delete button?

我正在使用 Realm 来持久化这些项目，但我不知道该把 try! 放在哪里！realm.write 和 realm.delete(category) 代码.

I am using Realm to persist the items, but I'm having trouble knowing where to put the try! realm.write and realm.delete(category) code.

谢谢.

推荐答案

闭包并不过分复杂.尝试这样的事情:

Closures aren't overcomplicated. Try something like this:

/// the cell
class CollectionCell: UICollectionViewCell {
    var deleteThisCell: (() -> Void)?
    @IBAction func deletePressed(_ sender: Any) {
       deleteThisCell?()
    }
}

/// the view controller

class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "yourReuseID", for: indexPath) as! CollectionCell
        cell.deleteThisCell = { [weak self] in

        /// your deletion code here
        /// for example:

        self?.yourDataSource.remove(at: indexPath.item)

        do {
            try self?.realm.write {
                self?.realm.delete(projects[indexPath.item]) /// or whatever realm array you have
            }
            self?.collectionView.performBatchUpdates({
                self?.collectionView.deleteItems(at: [indexPath])
            }, completion: nil)
        } catch {
            print("Error deleting project from realm: \(error)")
        }
    }
}

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