我有 UICollectionView 2 行 10+ 个单元格。 默认取消选择。当我点击它时它会被选中,但当我再次点击时不会取消选择。
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print(indexPath)
let cell = collectionView.cellForItem(at: indexPath)
let collectionActive: UIImageView = {
let image=UIImageView(image: #imageLiteral(resourceName: "collectionActive"))
image.contentMode = .scaleAspectFill
return image
}()
let collectionInactive: UIImageView = {
let image=UIImageView(image: #imageLiteral(resourceName: "collectionInactive"))
image.contentMode = .scaleAspectFill
return image
}()
if cell?.isSelected == true {
cell?.backgroundView = collectionActive
}else{
cell?.backgroundView = collectionInactive
}
}
如何解决这个问题?
最佳答案
在viewDidLoad()中
collectionView.allowsMultipleSelection = true;
后记我实现了这些方法
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCell
cell.toggleSelected()
}
func collectionView(collectionView: UICollectionView, didDeselectItemAtIndexPath indexPath: NSIndexPath) {
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCell
cell.toggleSelected()
}
终于上课了
class MyCell : UICollectionViewCell {
func toggleSelected ()
{
if (selected){
backgroundColor = UIColor.redColor()
}else {
backgroundColor = UIColor.whiteColor()
}
}
}
关于ios - UICollectionView 选择和取消选择,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49303123/