調用reloadData時didDeselectItemAtIndexPath不起作用

Question

當我嘗試選擇時，didDeselectItemAtIndexPath方法未觸發。 如果我的代碼中有任何設置錯誤，請告訴我。

我試圖顯示勾選的圖標，如果選擇了圖像，如果取消選擇則消失了圖像。

謝謝您的幫助。

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
{
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! CollectionViewCell
    cell.imageView.image = UIImage(contentsOfFile: self.getMediaFilePath(self.mediaModels[indexPath.row].pathToMedia))
    if self.mediaModels[indexPath.row].isSelected {
        cell.imageTicked.hidden = false
        cell.selected = true
    } else {
        cell.imageTicked.hidden = true
        cell.selected = false
    }
    return cell

}

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath){

    var cell : UICollectionViewCell = collectionView.cellForItemAtIndexPath(indexPath)!
    cell.backgroundColor = UIColor.magentaColor()
    self.mediaModels[indexPath.row].isSelected  = true
    cell.selected = true
    collectionView.reloadData()
}
func collectionView(collectionView: UICollectionView, didDeselectItemAtIndexPath indexPath: NSIndexPath){

    var cell : UICollectionViewCell = collectionView.cellForItemAtIndexPath(indexPath)!
    cell.backgroundColor = UIColor.whiteColor()
    self.mediaModels[indexPath.row].isSelected  = false
    cell.selected = false
    collectionView.reloadData()
}
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {

    let cellSize = (collectionView.frame.width / 4) - 4

    return CGSizeMake(cellSize, cellSize)
}

Answer 1

嘗試這個

使用cell.userInteractionEnabled = YES; 在cellForRowAtIndexPath方法中。

Answer 2

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath){

    var cell : CollectionViewCell = collectionView.cellForItemAtIndexPath(indexPath) as! CollectionViewCell
    cell.backgroundColor = UIColor.magentaColor()
    self.mediaModels[indexPath.row].isSelected  = true
    cell.selected = true
    cell.imageTicked.hidden = false
}
func collectionView(collectionView: UICollectionView, didDeselectItemAtIndexPath indexPath: NSIndexPath){

    var cell : CollectionViewCell = collectionView.cellForItemAtIndexPath(indexPath) as! CollectionViewCell
    cell.backgroundColor = UIColor.whiteColor()
    self.mediaModels[indexPath.row].isSelected  = false
    cell.selected = false
    cell.imageTicked.hidden = true
}

我無需重新加載數據即可正常工作。 只需將imageTicked設置為隱藏在didSelectItemAtIndexPath和didDeselectItemAtIndexPath方法中即可。 謝謝。