[英]Error when copy from CollectionView cell (Swift)
I make Drag and Drop app. 我制作拖放应用程序。
He is work fine, but copy from cell not work. 他工作很好,但是从牢房复制不起作用。
When i tap on collection view cell, i have error. 当我点击集合视图单元格时,我出错了。
My code for copy: 我的复制代码:
let cell = collectionView.cellForItem(at: indexPath) as! TextCollectionViewCell
UIPasteboard.general.string = cell.textLabel?.text
cellForItemAt cellForItemAt
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let item = everitems[indexPath.row]
switch item {
case .text(let content):
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "TextCollectionViewCell", for: indexPath) as! TextCollectionViewCell
cell.configureWithText(content)
cell.layer.cornerRadius = 8.0
cell.layer.masksToBounds = true
return cell
case .image(let content):
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ImageCollectionViewCell", for: indexPath) as! ImageCollectionViewCell
cell.layer.cornerRadius = 8.0
cell.layer.masksToBounds = true
cell.configureWithImage(content)
return cell
}
}
Error - Thread 1: signal SIGABRT 错误-线程1:信号SIGABRT
2018-04-02 19:54:35.520913+0500 DragBook[6891:189120] [MC] Reading
2018-04-02 19:54:35.520913 + 0500 DragBook [6891:189120] [MC]阅读
from private effective user settings.来自私人有效用户设置。 Could not cast value of type
无法转换类型的值
'DragBook.ImageCollectionViewCell' (0x10e67e0e0) to'DragBook.ImageCollectionViewCell'(0x10e67e0e0)至
'DragBook.TextCollectionViewCell' (0x10e67e4e0).'DragBook.TextCollectionViewCell'(0x10e67e4e0)。 2018-04-02
2018年4月2日
19:54:48.631190+0500 DragBook[6891:189120] Could not cast value of19:54:48.631190 + 0500 DragBook [6891:189120]无法强制转换为
type 'DragBook.ImageCollectionViewCell' (0x10e67e0e0) to键入'DragBook.ImageCollectionViewCell'(0x10e67e0e0)来
'DragBook.TextCollectionViewCell' (0x10e67e4e0).'DragBook.TextCollectionViewCell'(0x10e67e4e0)。 (lldb)
(LLDB)
Solution: 解:
if let cell = collectionView.cellForItem(at: indexPath) as? ImageCollectionViewCell{
UIPasteboard.general.image = cell.imageView?.image
print("Image")
} else if let cell = collectionView.cellForItem(at: indexPath) as? TextCollectionViewCell{
UIPasteboard.general.string = cell.textLabel?.text
print("Text")
}
The problem is that the cell may be imageCell and you force cast it as textCell 问题在于该单元格可能是imageCell,并且您强制将其强制转换为textCell
if let cell = collectionView.cellForItem(at: indexPath) as? TextCollectionViewCell{
}
else
{
/// it's image cell
let cell = collectionView.cellForItem(at: indexPath) as! ImageCollectionViewCell
}
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