我有 Collection View 。 This collectionview is multi selected when selected one item enable a button to send request, this part is working perfectly but when deselect one item disable button.我想要取消选择 Collection View 中的所有项目禁用按钮。 这是我的代码: 所选项目的此功能:
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let selectedCell = requestCollectionView.cellForItem(at: indexPath) as! RequestCollectionViewCell
selectedCell.imageCell.image = (imageNotDimmed[indexPath.row])
if selectedCell.isSelected == true{
btnRequestInRequest.isEnabled = true
btnRequestInRequest.setImage(#imageLiteral(resourceName: "SOS_Sending_Btn"), for: .normal)
imageRingRequest.image = UIImage(named: "TheRing.png")
}
else if selectedCell.isHighlighted == false{
btnRequestInRequest.setImage(#imageLiteral(resourceName: "TheRing_Dimmed"), for: .normal)
imageRingRequest.image = UIImage(named: "SOS_Dimmed_Btn.png")
}
}
以及取消选择的这个函数:
func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
let deselected = requestCollectionView.cellForItem(at: indexPath) as! RequestCollectionViewCell
deselected.imageCell.image = (imageDimmed[indexPath.row])
}
我想要当集合中的所有项目取消选择按钮禁用时
最佳答案
将所有选定的项目保存在一个数组中让我们说 var selectedItems = [Int()] 选择时将索引路径放入此数组:
func collectionView(_ collectionView: UICollectionView,didSelectItemAt indexPath: IndexPath) {
let selectedCell = requestCollectionView.cellForItem(at: indexPath) as! RequestCollectionViewCell
selectedItems.append(indexPath.row) // here you save the selected item index path
selectedCell.imageCell.image = (imageNotDimmed[indexPath.row])
if selectedCell.isSelected == true{
btnRequestInRequest.isEnabled = true
btnRequestInRequest.setImage(#imageLiteral(resourceName:"SOS_Sending_Btn"), for: .normal)
imageRingRequest.image = UIImage(named: "TheRing.png")
}
else if selectedCell.isHighlighted == false{
btnRequestInRequest.setImage(#imageLiteral(resourceName: "TheRing_Dimmed"), for: .normal)
imageRingRequest.image = UIImage(named: "SOS_Dimmed_Btn.png")
}
}
在取消选择函数中，只需将它们从数组中删除并检查数组是否包含任何数字
func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
let deselected = requestCollectionView.cellForItem(at: indexPath) as! RequestCollectionViewCell
// check if there anything selected and then check if the user deselected any of them and then remove it from the array if the array was empty so you have no selected cell then you can disable you button
if selectedItems.count > 1 {
for indexes in selectedItems{
if indexpath.row == selectedItems[indexes]{
selectedItems.remove(at : indexes)
}
}
}
else {
selectedItems.remove(at : 0 )
myButton.isEnabled = false
}
deselected.imageCell.image = (imageDimmed[indexPath.row])
}
P.S: 我没有检查语法，所以它可能有问题，但想法是一样的
关于swift - 选择和取消选择 UICollectionview 以启用按钮，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49872029/