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我遇到了很大的麻烦，因为当我在我的单元格中选择一个单元格collectionView并更改我的数组数据时，我收到了以下错误消息：

'无效更新：第0节中的项目数无效。更新后现有节中包含的项目数（2）必须等于更新前该节中包含的项目数（2），加上或减去从该部分插入或删除的项目数（1 插入，0 删除）加上或减去移入或移出该部分的项目数（0 移入，0 移出）。

它发生在 iOS 13 之前。在 iOS 13 和更高版本中运行良好。有我的代码：

import UIKit
import ReactiveKit
import Bond

//Its in my viewModel

var arrayOfObjects = MutableObservableArray<MyObject>([])


  actionCollectionViewDidSelect.observeNext { [weak self] indexPath in
        guard indexPath.row != 0 else { return }
        guard let object = self?.arrayOfPhotoObjects[indexPath.row] else { return }
        photoObject.isSelected = !photoObject.isSelected
        if let value = self?.arrayOfObjects.value { self?.arrayOfPhotoObjects.value = value } // Gives error because there but I can't find solution.
    }.dispose(in: disposeBag)

//Its in my ViewController


collectionView.reactive.selectedItemIndexPath.observe(with: viewModel.actionCollectionViewDidSelect).dispose(in: disposeBag)

    viewModel.arrayOfObjects.bind(to: collectionView) { object, indexPath, collectionView in
        
        let objectForIndex = arrayObjects[indexPath.row]
       
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "photoBoxCollectionViewCell", for: indexPath) as! MYCEll
             cell.data = objectForIndex
            return cell
        }
    }
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1 回答 1

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当我尝试更改阵列时，我发现了问题，它遇到了麻烦。我的解决方案是：

  actionCollectionViewDidSelect.observeNext { [weak self] indexPath in
    guard indexPath.row != 0 else { return }
    guard let object = self?.arrayOfPhotoObjects[indexPath.row] else { return }
    photoObject.isSelected = !photoObject.isSelected
    if let value = self?.arrayOfObjects.value {                     
            let collection = value.collection
            let newArrayObject = MutableObservableArray<PhotoObject(collection)
            self?.arrayOfPhotoObjects.value = newArrayObject.value }
   }.dispose(in: disposeBag)
于 2021-01-04T21:05:51.267 回答